阅读说明：本技术 一种两级调节式烟纸爆墨极限测试装置及其调节方法 (Two-stage adjusting type cigarette paper ink burst limit testing device and adjusting method thereof ) 是由 傅佩周 蔡利 李朝荣 赵朋贤 谢飞 陶文生 于 2021-07-20 设计创作，主要内容包括：本发明属于香烟生产检测技术领域,涉及一种两级调节式烟纸爆墨极限测试装置及其调节方法,包括基架,基架上设有安装架,安装架上滑动安装有载台,安装架上安装有辊轴架,辊轴架上开设有第一滑槽,第一滑槽内滑动安装有滚压件,滚压件包括第一U形架和第二U形架,第一U形架上安装有压辊,第二U形架上安装有承接辊,第一U形架上安装有滑块,安装架上安装有耳板,滑块与耳板之间安装有弹簧,安装架上固定安装有安装轴,安装轴上滑动安装有可调楔体,安装轴一端连接有螺杆,螺杆上螺接有调节件,可调楔体上固定安装有连杆,连杆滑动卡接于调节件上,用于解决目前在调节时仅能定量调节,导致测试结果误差较大的问题。(The invention belongs to the technical field of cigarette production detection, and relates to a two-stage adjustment type cigarette paper ink burst limit testing device and an adjustment method thereof, wherein the two-stage adjustment type cigarette paper ink burst limit testing device comprises a base frame, a mounting frame is arranged on the base frame, a carrying platform is slidably arranged on the mounting frame, a roller frame is arranged on the mounting frame, a first sliding groove is formed in the roller frame, a rolling piece is slidably arranged in the first sliding groove and comprises a first U-shaped frame and a second U-shaped frame, a press roller is arranged on the first U-shaped frame, a carrying roller is arranged on the second U-shaped frame, a sliding block is arranged on the first U-shaped frame, an ear plate is arranged on the mounting frame, a spring is arranged between the sliding block and the ear plate, a mounting shaft is fixedly arranged on the mounting frame, an adjustable wedge body is slidably arranged on the mounting shaft, one end of the mounting shaft is connected with a screw rod, the screw rod is screwed with an adjusting piece, a connecting rod is fixedly arranged on the adjustable wedge body, the connecting rod is slidably clamped on the adjusting piece, and is used for solving the problem that only quantitative adjustment can be carried out at present time when in adjustment, leading to the problem of large error of the test result.)

1. The utility model provides a black limit testing arrangement is exploded to two-stage regulation formula cigarette paper, includes bed frame (1), its characterized in that: the roller press is characterized in that a base frame (1) is provided with a mounting frame (2), a carrier (3) is slidably mounted on the mounting frame (2), a roller frame (22) is mounted on the mounting frame (2), a first sliding groove (221) is formed in the roller frame (22), a rolling piece (4) is slidably mounted in the first sliding groove (221), the rolling piece (4) comprises a first U-shaped frame (41) and a second U-shaped frame (44) which are integrally formed, a press roller (43) and a receiving roller (45) are respectively mounted on the first U-shaped frame (41) and the second U-shaped frame (44), a mounting shaft (27) is fixedly mounted on the mounting frame (2), an adjustable wedge body (5) is slidably mounted on the mounting shaft (27), one end of the mounting shaft (27) is connected with a screw rod (28), an adjusting piece is screwed on the screw rod (28), and a connecting rod (57) is fixedly mounted on the adjustable wedge body (5), the connecting rod (57) penetrates through the roller frame (22) in a sliding mode, the connecting rod (57) is connected to the adjusting piece in a sliding mode in a clamping mode, the adjustable wedge body (5) comprises a first mounting disc (51) and a second mounting disc (52) which are mounted on a mounting shaft (27) in a sliding mode, the outer diameter of the first mounting disc (51) is smaller than that of the second mounting disc (52), a first mounting groove (511) is formed in the outer circumference of the first mounting disc (51), a second mounting groove (521) is formed in the outer circumference of the second mounting disc (52), an adjusting plate (53) is mounted on the first mounting disc (51), hinged columns (531) and adjusting columns (532) are arranged at two ends of the adjusting plate (53) respectively, an adjusting groove (533) is formed in the adjusting column (532), clamping columns are arranged in the second mounting groove (521), and are located in the second mounting groove (521), the adjustable-type spring support is characterized in that a first mounting seat (512) and a second mounting seat (513) are arranged on the first mounting plate (51), an adjusting rod (54) is installed in a penetrating mode in the first mounting seat (512), limiting rings (543) are fixedly installed on the two sides of the first mounting seat (512) in the adjusting rod (54), threads (541) are arranged on the adjusting rod (54), the adjusting rod (54) is connected onto the second mounting plate (52) in a threaded mode, a first adjusting wheel (542) is installed at the end portion of the adjusting rod (54), a first scale (55) is installed on the second mounting seat (513), the first scale (55) penetrates the second mounting plate (52) in a sliding mode, a sliding block (42) is installed on the first U-shaped frame (41), the sliding block (42) is located in a first sliding groove (221), an ear plate (23) is installed on the mounting frame (2), and a spring (25) is installed between the sliding block (42) and the ear plate (23), the adjusting plate (53) is in tangential contact with the take-up roller (45).

2. The two-stage adjustable cigarette paper burst ink limit testing device according to claim 1, wherein: the adjusting piece comprises an integrally formed adjusting sleeve (561) and a second adjusting wheel (562), the adjusting sleeve (561) is in threaded connection with the screw rod (28), a linkage groove (563) is formed in the adjusting sleeve (561), a linkage block (571) is fixedly mounted at the end of the connecting rod (57), and the linkage block (571) is clamped in the linkage groove (563).

3. The two-stage adjustable cigarette paper burst ink limit testing device according to claim 2, wherein: the paper clamping mechanism is characterized in that a positioning plate (31) is arranged on the carrying platform (3), a hinged base (321) is installed on the carrying platform (3), a mounting column (322) penetrates through the hinged base (321), a paper clamping frame (323) is fixedly installed on the mounting column (322), a torsion spring (324) is connected between the paper clamping frame (323) and the hinged base (321), and the mounting column (322) is sleeved with the torsion spring (324).

4. The two-stage adjustable cigarette paper burst ink limit testing device according to claim 3, wherein: the roller shaft frame (22) is provided with a reserved groove matched with the ruler plate (58), the ruler plate (58) is located in the reserved groove, and the ruler plate (58) is provided with adjusting scales in a carved mode.

5. An adjustment method of adjustment accuracy, characterized in that: the adjusting method of the adjusting precision is based on the electrodeless adjusting cigarette paper ink explosion limit testing device of claim 4, and comprises the following steps:

length scale production: measuring the maximum distance and the minimum distance between the first mounting disc (51) and the second mounting disc (52), marking the maximum value on the first scale (55) at one end position of the second mounting disc (52) close to the first mounting disc (51) at the maximum distance, marking the minimum value on the first scale (55) at one end position of the second mounting disc (52) close to the first mounting disc (51) at the minimum distance, and marking length scales in millimeter units between the maximum value mark and the minimum value mark;

and (3) adjusting scale manufacturing: when the end part of the hinged column (531) is contacted with the outer circumference of the bearing column (4), one end of the roller shaft frame (22) close to the adjusting piece is zero scale, and adjusting scale is drawn on the ruler plate (58), and meanwhile, the distance between the pressing roller (43) and the carrying platform (3) is measured, and the adjusting scale is in millimeter unit;

measuring the height adjusting range of the press roller: the outer diameters of the first mounting disc (51) and the second mounting disc (52) are different, the adjusting plate (53) mounted on the first mounting disc (51) and the second mounting disc (52) is necessarily in an inclined state, and the height difference between the end parts of the hinge column (531) and the adjusting column (532) is measured when the distance between the first mounting disc (51) and the second mounting disc (52) is maximum, namely the adjusting range;

identification of an adjustment amount: the reading of the length scale on the first scale (55) is defined as a by taking the end of the second mounting disc (52) close to the first mounting disc (51) as a standard, the adjusting range is defined as b, the reading of the adjusting scale on the scale is defined as c by taking the end of the roller frame (22) close to the adjusting piece when the end of the hinge column (531) is in contact with the outer circumference of the bearing column (4), and the adjusting quantity is the product of L and c by defining L as the height change of the inner pressing roller (43) per unit length, namely L is b/a.

Technical Field

The invention belongs to the technical field of cigarette production detection, and particularly relates to a two-stage adjusting type cigarette paper ink burst limit testing device and an adjusting method thereof.

Background

With the wider and wider application of paper such as base paper, composite paper and transfer paper in packaging, whether the paper can meet the printing requirements of the packaging in specific applications is also an important performance requirement. The surface strength of the printing surface of the paper is generally tested by adopting a dyne pen and a dyne liquid to represent whether the paper is suitable for printing or not, so that the quality is controlled, and the loss caused by unqualified materials is reduced. However, the method has poor quality detection effect on the cigarette paper, the ink explosion limit of the cigarette paper is difficult to obtain, and in order to obtain the ink explosion limit of the cigarette paper better, some testing devices currently set multi-stage steps with different outer diameters on a press roller roll the cigarette paper through the steps with different outer diameters to change the rolling force, however, because the outer diameters of the steps are fixed and can only be adjusted quantitatively, some testing devices adopting a conical roller to perform extrusion adjustment can make up the defect of the step roller though the adjustment amount changes gently, but the adjustment precision cannot be changed, so that the error of the testing result is larger.

Disclosure of Invention

Based on the problems mentioned in the background technology, the invention provides a two-stage adjusting type cigarette paper ink explosion limit testing device and an adjusting method thereof, which are used for solving the problem that the error of a testing result is large because only quantitative adjustment can be carried out during adjustment at present. The technical scheme adopted by the invention is as follows:

a two-stage adjusting type cigarette paper ink explosion limit testing device and an adjusting method thereof comprise a base frame, wherein a mounting frame is arranged on the base frame, a carrying platform is slidably mounted on the mounting frame, a roller frame is mounted on the mounting frame, a first sliding groove is formed in the roller frame, a rolling piece is slidably mounted in the first sliding groove and comprises a first U-shaped frame and a second U-shaped frame which are integrally formed, a press roller and a receiving roller are respectively mounted on the first U-shaped frame and the second U-shaped frame, a mounting shaft is fixedly mounted on the mounting frame, an adjustable wedge body is slidably mounted on the mounting shaft, one end of the mounting shaft is connected with a screw rod, an adjusting piece is screwed on the screw rod, a connecting rod is fixedly mounted on the adjustable wedge body, the connecting rod is slidably arranged on the roller frame in a penetrating manner, the connecting rod is slidably clamped on the adjusting piece, the adjustable wedge body comprises a first mounting disc and a second mounting disc which are slidably mounted on the mounting shaft, the outer diameter of the first mounting disc is smaller than that of the second mounting disc, a first mounting groove is formed in the outer circumference of the first mounting disc, a second mounting groove is formed in the outer circumference of the second mounting disc, a regulating plate is mounted on the first mounting disc, hinge columns and regulating columns are arranged at two ends of the regulating plate respectively, a regulating groove is formed in each regulating column, a clamping column is arranged in each second mounting groove and is located in each second mounting groove, a first mounting seat and a second mounting seat are arranged on the first mounting disc, a regulating rod is mounted on the first mounting seat in a penetrating mode, limiting rings are fixedly mounted on two sides of the first mounting seat in a regulating mode, threads are arranged on the regulating rod, the regulating rod is in a threaded mode and is connected to the second mounting disc, a first regulating wheel is mounted at the end portion of the regulating rod, a first scale is mounted on the second mounting seat, and is slidably arranged on the second mounting disc in a penetrating mode, install the slider on the first U-shaped frame, the slider is located first spout, install the otic placode on the mounting bracket, install the spring between slider and the otic placode, the regulating plate contacts with accepting the roller is tangent.

On the basis of the scheme, the invention also improves the following steps:

furthermore, the slider is provided with a guide hole, the ear plate is provided with a guide post, the guide post is arranged in the guide hole in a penetrating manner, and the spring is sleeved on the guide post.

Further, the regulating part includes integrated into one piece adjusting sleeve and second regulating wheel, adjusting sleeve spiro union is on the screw rod, the linkage groove has been seted up on the adjusting sleeve, connecting rod tip fixed mounting has the linkage piece, the linkage piece card is located in the linkage groove.

Further, the carrying platform is provided with a roller, the mounting frame is provided with a second sliding groove corresponding to the roller, the roller is located in the second sliding groove, one end of the mounting frame is provided with a limiting plate, and the carrying platform is provided with a handle.

Further, the carrying platform is provided with a positioning plate, the carrying platform is provided with a hinged base, the hinged base is provided with a mounting column in a penetrating mode, a paper clamping frame is fixedly mounted on the mounting column, a torsion spring is connected between the paper clamping frame and the hinged base, and the mounting column is sleeved with the torsion spring.

Further, a ruler plate is installed on the connecting rod, a preformed groove matched with the ruler plate is formed in the roller shaft frame, the ruler plate is located in the preformed groove, and adjusting scales are carved on the ruler plate.

The invention also discloses a precision adjusting method: the method comprises the following steps:

length scale production: measuring the maximum distance and the minimum distance between the first mounting disc and the second mounting disc, marking the maximum value at one end of the second mounting disc close to the first mounting disc on the first scale at the maximum distance, marking the minimum value at one end of the second mounting disc close to the first mounting disc on the first scale at the minimum distance, and carving length scales in millimeter units between the maximum value mark and the minimum value mark;

and (3) adjusting scale manufacturing: when the end part of the hinged column is contacted with the outer circumference of the receiving column, one end of the roller shaft frame close to the adjusting piece is zero scale, and an adjusting scale is drawn on the ruler plate, and meanwhile, the distance between the pressing roller and the carrying platform is measured, and the adjusting scale is in millimeter units;

measuring the height adjusting range of the press roller: the adjusting plates arranged on the first mounting disc and the second mounting disc are necessarily in an inclined state due to different outer diameters of the first mounting disc and the second mounting disc, and the height difference between the end parts of the hinge column and the adjusting column when the distance between the first mounting disc and the second mounting disc is the largest is measured to be the adjusting range;

identification of an adjustment amount: the one end that uses the second mounting disc to be close to first mounting disc is with the reading that defines the length scale on the first scale as the standard as an a, and definition control range is b, and the one end that the roller frame is close to the regulating part when accepting the contact of post outer circumference with articulated post tip is as the reading that the scale was adjusted on the standard definition scale as c, and definition regulation precision is L, and wherein L is the change in height of compression roller in the unit length, and L is b/a promptly, then the regulating variable is the product of L and c, can change the regulation precision through the size that changes regulating variable L.

The invention has the beneficial effects that:

1. the roller pressing piece is supported by the spring, then the adjustable wedge body is moved to extrude the roller pressing piece, the height of the contact part of the adjusting plate and the receiving roller is changed after the adjusting plate is inclined and moved, and then the roller pressing piece can be extruded to change the distance between the pressing roller and the carrying platform, so that the ink explosion limit of the cigarette paper can be better reached;

2. the distance between the first mounting disc and the second mounting disc is adjustable, so that the inclination of an adjusting plate arranged on the first mounting disc and the second mounting disc can be adjusted, and the adjustment precision can be adjusted;

3. the roller pressing piece is adjusted through the adjustable wedge body, adjustment is convenient, adjustment amount can be changed at will, stepless adjustment of the distance between the pressing roller and the carrying platform can be achieved, the ink explosion limit of the cigarette paper can be better tested, and the error of a test result is small.

Drawings

The invention is further illustrated by the non-limiting examples given in the accompanying drawings;

FIG. 1 is a schematic structural diagram of a two-stage adjustable type cigarette paper ink burst limit testing device and an adjusting method thereof in the embodiment of the invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

FIG. 3 is an enlarged view of the structure at B in FIG. 2;

FIG. 4 is a schematic structural diagram of a carrier in an embodiment of the present disclosure;

FIG. 5 is an enlarged view of the structure at C in FIG. 4;

FIG. 6 is a first schematic structural diagram of an adjustable wedge according to an embodiment of the present invention;

FIG. 7 is an enlarged view of the structure of FIG. 6 at D;

FIG. 8 is a second schematic structural diagram of an adjustable wedge according to an embodiment of the present invention;

the main element symbols are as follows:

the base frame 1, the screw knob 11, the mounting frame 2, the second sliding slot 21, the roller frame 22, the first sliding slot 221, the ear plate 23, the guide post 24, the spring 25, the limit plate 26, the mounting shaft 27, the screw 28, the carrier 3, the positioning plate 31, the hinge base 321, the mounting post 322, the paper clamping frame 323, the torsion spring 324, the handle 33, the roller 34, the rolling member 4, the first U-shaped frame 41, the sliding block 42, the guide hole 421 and the press roller 43, the cigarette paper cutting machine comprises a second U-shaped frame 44, a receiving roller 45, an adjustable wedge 5, a first mounting disc 51, a first mounting groove 511, a first mounting seat 512, a second mounting seat 513, a second mounting disc 52, a second mounting groove 521, a hinge column 531, an adjusting column 532, an adjusting groove 533, an adjusting 54, a thread 541, a first adjusting wheel 542, a limiting ring 543, a first scale 55, an adjusting sleeve 561, a second adjusting wheel 562, a linkage groove 563, a connecting rod 57, a linkage block 571, a scale plate 58 and cigarette paper 6.

Detailed Description

In order that those skilled in the art can better understand the present invention, the following technical solutions are further described with reference to the accompanying drawings and examples.

Examples

As shown in fig. 1 to 8, a two-stage adjusting type cigarette paper ink explosion limit testing device and an adjusting method thereof include a base frame 1, wherein a mounting frame 2 is arranged on the base frame 1, a carrying platform 3 is slidably arranged on the mounting frame 2, a roller frame 22 is arranged on the mounting frame 2, a first sliding groove 221 is arranged on the roller frame 22, a rolling part 4 is slidably arranged in the first sliding groove 221, the rolling part 4 includes a first U-shaped frame 41 and a second U-shaped frame 44 which are integrally formed, a press roller 43 is arranged on the first U-shaped frame 41, a receiving roller 45 is arranged on the second U-shaped frame 44, a sliding block 42 is arranged on the first U-shaped frame 41, the sliding block 42 is positioned in the first sliding groove 221, an ear plate 23 is arranged on the mounting frame 2, a spring 25 is arranged between the sliding block 42 and the ear plate 23, a mounting shaft 27 is fixedly arranged on the mounting frame 2, an adjustable wedge 5 is slidably arranged on the mounting shaft 27, one end of the mounting shaft 27 is connected with a screw 28, the screw 28 is screwed with an adjusting member, the adjustable wedge 5 is fixedly provided with a connecting rod 57, the connecting rod 57 is slidably arranged on the roller frame 22, the connecting rod 57 is slidably clamped on the adjusting member, the adjustable wedge 5 comprises a first mounting disc 51 and a second mounting disc 52 which are slidably arranged on the mounting shaft 27, the outer diameter of the first mounting disc 51 is smaller than that of the second mounting disc 52, the outer circumference of the first mounting disc 51 is provided with a first mounting groove 511, the outer circumference of the second mounting disc 52 is provided with a second mounting groove 521, the first mounting disc 51 is provided with an adjusting plate 53, two ends of the adjusting plate 53 are respectively provided with a hinge column 531 and an adjusting column 532, the adjusting column 532 is provided with an adjusting groove 533, a clamping column is arranged in the second mounting groove 521, the first mounting seat 512 and a second mounting seat 513 are arranged on the first mounting disc 51, the first mounting seat 512 is provided with an adjusting rod 54, the adjusting rod 54 is fixedly provided with a limiting ring 543 at two sides of the first mounting seat 512, the adjusting rod 54 is provided with a thread 541, the adjusting rod 54 is screwed on the second mounting plate 52, the end of the adjusting rod 54 is provided with a first adjusting wheel 542, the second mounting seat 513 is provided with a first scale 55, and the first scale 55 is slidably arranged on the second mounting plate 52.

When the scale of the first scale is set, firstly, the maximum distance and the minimum distance between the first mounting disc 51 and the second mounting disc 52 are measured, the maximum value is marked on the first scale 55 at the position of one end, close to the first mounting disc 51, of the second mounting disc 52 at the maximum distance, the minimum value is marked on the first scale 55 at the position of one end, close to the first mounting disc 51, of the second mounting disc 52 at the minimum distance, and length scales are marked between the maximum value mark and the minimum value mark in millimeter;

specifically, the slider 42 is provided with a guide hole 421, the ear plate 23 is provided with a guide post 24, the guide post 24 is arranged in the guide hole 421 in a penetrating manner, the spring 25 is sleeved on the guide post 24, and the influence on rolling of the cigarette paper 6 caused by the inclination of the press roller 43 is avoided through the matching of the guide post 24 and the guide hole 421.

Specifically, the adjusting part comprises an integrally formed adjusting sleeve 561 and a second adjusting wheel 562, the adjusting sleeve 561 is in threaded connection with the screw 28, a linkage groove 563 is formed in the adjusting sleeve 561, a linkage block 571 is fixedly mounted at the end of the connecting rod 57, the linkage block 571 is clamped in the linkage groove 563, the linkage groove 563 can drive the connecting rod 57 to slide through the linkage block 571 when the second adjusting wheel 562 drives the adjusting sleeve 561 to rotate, and the connecting rod 57 drives the adjustable wedge 5 to slide, so that the height of the rolling part 4 can be adjusted.

Specifically, a roller 34 is installed on the stage 3, a second chute 21 corresponding to the roller 34 is formed in the mounting frame 2, the roller 34 is located in the second chute 21, a limiting plate 26 is installed at one end of the mounting frame 2, a handle 33 is installed on the stage 3, and friction resistance between the stage 3 and the mounting frame 2 is reduced through the roller 34, so that the stage 3 can slide better, and meanwhile the stage 3 is prevented from sliding out of the second chute 21 under the action of the limiting plate 26.

Specifically, be equipped with locating plate 31 on the microscope carrier 3, install articulated seat 321 on the microscope carrier 3, wear to be equipped with erection column 322 on the articulated seat 321, fixed mounting has paper clamping frame 323 on the erection column 322, is connected with torsional spring 324 between paper clamping frame 323 and the articulated seat 321, and torsional spring 324 cover is located on the erection column 322, and paper clamping frame 323 provides torsion through torsional spring 324 and carries out the centre gripping to cigarette 6, avoids appearing the skew in cigarette 6 before the compression roller 43 rolls over the roll extrusion to cigarette 6.

Specifically, a ruler plate 58 is installed on the connecting rod 57, a preformed groove matched with the ruler plate 58 is formed in the roller frame 22, the ruler plate 58 is located in the preformed groove, an adjusting scale is carved on the ruler plate 58, the height adjusting amount of the adjustable wedge 5 to the rolling piece 4 can be known through the length of the adjusting scale which is immersed in the preformed groove, and when the scale of the ruler plate 58 is set, the adjusting scale is carved on the ruler plate 58 by taking the end of the hinged column 531 as zero scale when the end of the hinged column contacts with the outer circumference of the bearing column 4 and the end, close to the adjusting piece, of the roller frame 22.

In the test, firstly, the value of the adjustment precision L is determined according to the requirement, since L is b/a, and the adjustment range b is a fixed value, the value of the length scale a on the first scale 55 can be calculated, then the first adjustment wheel 542 is rotated according to the value of a to adjust the distance between the first mounting plate 51 and the second mounting plate 52, so that the second mounting plate 52 is close to one end a of the first mounting plate 51, the cigarette paper 6 is folded and placed on the stage 3, then the paper clamping frame 323 is pulled to push one end of the cigarette paper 6 to the positioning plate 31 and then the paper clamping frame 323 is released, the cigarette paper 6 is clamped by the paper clamping frame 323 under the action of the torsion spring 324, then the adjustment quantity N required for the distance between the compression roller 43 and the stage 3 is determined, the horizontal position of the adjustable wedge 5 is adjusted according to the value of N, since the adjustment precision L is determined, the adjustment quantity c is N/L, then the second adjustment wheel 562 is rotated to drive the adjustment sleeve 561 to rotate, the adjusting sleeve 561 moves on the screw 28 and simultaneously drives the linkage block 571 to move through the linkage groove 563, the adjustable wedge 5 is driven to slide under the action of the connecting rod 57 until one end of the roller frame 22 close to the adjusting piece is located at the value c on the ruler plate 58, then the carrying platform 3 is pulled to move through the handle 33, and the cigarette paper 6 is rolled through the pressing roller 43 to perform an ink explosion test.

The two-stage adjustable cigarette paper ink explosion limit testing device and the adjusting method thereof provided by the invention are described in detail above. The description of the specific embodiments is only intended to facilitate an understanding of the method of the invention and its core ideas. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.