JPS59118396A - Paper cutter - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a paper cutting device.

Paper cutting devices are widely used in industries such as the printing industry, and rotary paper cutting devices are common for cutting paper strips or paper webs of desired dimensions. Generally, rotary paper cutting devices include two cooperating rollers, one roller carrying a knife and the other roller being an anvil against which the paper is pressed and cut. It is desirable to cut paper cleanly and accurately, and numerous patents have been previously filed for this purpose. However, various problems exist in the industry today, including excessive noise and vibration of the device due to the knife repeatedly plunging into the anvil and creating a wound in the anvil, and the time required to replace the metal roller anvil. Costs will be listed. Therefore, the main object of the present invention is to provide a rotary paper cutting device that solves such color problems.

The main object of the present invention is to provide a rotary paper cutting device with reduced 5a noise during operation.

Another object of the present invention is to provide a rotary paper cutting device with reduced mechanical vibration during operation.

Yet another object of the present invention is to provide an anvil surface for a cutting knife of a rotary paper cutting device that has an increased useful life.

Another object of the present invention is to provide a cutting surface for a cutting knife of a rotary paper cutting device that can be easily repositioned to provide a fresh surface for the cutting operation.

Yet another object of the invention is to provide a cutting surface for a rotary paper cutting device that is easy to replace.

These and other objects are achieved in accordance with the invention by forming the surface against which the cutting knife strikes during a cutting operation from a resilient material. By forming the anvil cutting surface against which the cutting knife impinges from a resilient material, the noise and vibrations generated by the paper cutting device during operation are significantly reduced.

Furthermore, such a resilient surface is less likely to damage the cutting edge of the cutting knife, increasing the useful life of the cutting knife. The present invention is generally applied to rotary paper cutting devices.

The rotary paper cutting device comprises two cooperating rollers;
One roller carries the cutting knife, the other roller
back-up surface against which the paper web is cut, fi
I'm on the anvil. Such rotary paper cutting devices are well known in the art and therefore will not be described in detail in this t'JJ specification. For a rotary paper cutting device, see U.S. Patent No. 2.660. '242, No. 2.682.506
No. 3.709.0 '77, No. 3.857.13
See No. 4 and No. 3.893.359.

The benefits of the present invention will be further understood from the following description.

In more detail with reference to the drawings, reference numeral 10 designates a cutting roller having diametrically opposed, radially projecting and longitudinally extending knives 12 and 14. It is attached via mounts 15 and 16. Two cut r1 surface blood 2 formed of elastic material
2 and 24 are mounted on the backup roller 20 by mounts 23 and 25 at diametrically opposed positions on the backup roller 20.
Attached to 0. The knife 12 cuts the paper web 27 by cutting into the q-surface 24 and the knife 14
cuts the paper web by cutting into the resilient cutting surface 22. The rotational speeds of rollers 10 and 20 are synchronized to effect cutting in a slurping manner.

The cutting surface according to the invention is made of an elastomeric elastic material having a high tensile strength to withstand repeated blows by the cutting knife and returning substantially completely to its original dimensions at the ridge of the blow by the cutting knife. It is formed. Therefore, from Mobay Chemical Company under the trade name [Tex1nJ or Bi.
Using a unique elastic material that can be a urethane polymer, such as the urethane polymer commercially available from F. , Upjohn's CPR Vision product name [pHethan]
e J.22 Royal Rubber Company's product name [Royla
r J and Ohio Rubber Co.'s product name [□rtha
neJ wo posting Gf is a monkey.

A particularly preferred elastic material for forming the cut 1b-r'22 surface is a thermoplastic polyurethane material commercially available from B.F. Gutdrich, which has the following properties: und.

It is.

STM Shore hardness D2
240 tensile strength D
412 Tensile strength at 600% elongation
D412 Stretching limit D41
Stiffness at 223℃ l)
747 beaker softening point
D 1525” compression set
D695 6℃, 22 hours 70℃, 22 hours taper wear, C817 wheel 100011 load, reduced i/1000 cycles tear resistance D624 da 1 specific gravity
D792 low temperature 1 offshore! difference
D Rigidity modulus at 105323°C 2 5 IO Freezing point -605- Typical value sample' SI unit Inch-Bond unit 2
45D 45D1
4℃3MPa 46QQpsi1
2℃4MPa 310Dpsi1
450% 450%2 15.
8MPa 2300psi2 107
℃ 225℃2 28%
28%2 73% 73%22,
Cracking'C2113, 8KN/m 650To/in2
1, 22 1222
15.9MPa 2510ps i2
-2℃ 28 below 2 -11℃
12″F2 -16℃
Figure 2 shows that several precisely arranged rectangular elastic cutting surfaces 60, 62, 64 and 36 are provided on the metal mounting block 42 in the longitudinal direction. 37.
3B, 39 and 40 are shown. The mounting block 42 can be attached to the backup roller 45 by screws or bolts received in one or several holes 47 provided in the central portion of the mounting block. Extruded elastic strip 30.32
．． 54 and 66 are preferably, but not necessarily, square in cross-section and are fitted into slot 37 by frictional engagement.
68.39 and 40. For example, the strip can be formed to have a cross section of 7/16 x 7/16 inches. After a number of repeated blows by the cutting knife, an aperture or depression, indicated by number 50 (FIG. 3), may develop in the resilient cutting surface. If, after long-term use, the openings become more than acceptable, the strips 30.32, '54 and 36 with square cross section can be removed and the longitudinal orientation reversed or 90° from the previous position. It can then be re-inserted by turning it into position. Therefore, each strip is G (4'
It is possible to do 2 t+f.

The number of mounting blocks 42 provided around the backup roller 45 can be varied as desired to cut the paper web into strips of desired size. Similarly, the number of resilient cutting strips mounted within the mounting block may vary, with four embodiments being illustrated in FIG.

The arrangement in the cutting line direction of the bank up roller 45 holding the 1 front side 4-1 and the roller carrying the 1st knife 55 is such that the knife 55 can elastically cut at a predetermined setting. The over-adjustment can be made to strike any surface facing 50, 52, 34 or 66.

The radial positioning of the cutting blade 55 is generally determined when the blade is elastic. r table - to the depth of yuzu, for example about [
The plunge depth is determined to be between 1,010 and α080 inches, thereby making a clean and accurate cut of the web. Since the extrusion has an elastic cutting surface compared to a metal cutting anvil, the knife can be shaped like a razor blade. That is, the cutting edge of the knife is at a relatively small angle, for example about 15 degrees, and the knife is cut with a jagged or serrated edge.
Provides a straight cut as opposed to a cut that would be lr.

A suitable means for attaching a cutting knife and a cutting surface arrangement according to the invention is illustrated in FIG. In other words, L
A shaped knife mount 62 is attached to cutting roller 66 by bolts 67 and nuts 68. cutting knife 55
70 and nut 71 to the desired position in the radial direction. i'A will be done. Bolt is knife clamp 5
8 and the slot 59 of the knife 55 to securely secure the knife between the clamp 58 and the knife mount 62. If desired, auxiliary fingers 75 can be configured to cooperate with the knife mount to assist in directing the paper web 76 to a cutting position.

In the same way, the anvil block 78 is attached to the cap screw 81.
It is attached to the roller 80 by. A mounting block 42 carrying the IJ knobs 30, 32, 34 and the filter 6 is attached to the anvil block 78 by cap screws 83 passing through holes 47 in the mounting block 42. Further, in order to assist in guiding the paper web when cutting, the auxiliary finger piece 85 is attached to the roller 8 by means of a retaining screw 87.
You can add "l<" to ゜.

FIG. 5 shows one embodiment of the non-invention,
i? t7. strips or plugs 9o are spaced laterally around the backup roller 92.

Appropriate grooves are formed on the sides of the roller to receive and retain the resilient cutting surface. As shown, cooperating rollers 94 carry four cutting knives 96, but the number of knives could vary depending on the size of the paper being cut. For example, 24-inch repeat mark J1! I
If cutting @ into 6 inch strips, four knives can be provided on the cutting roller 94. Similarly, if a 24 inch repeat pattern is to be cut into 8 inch strips, five cutting knives may be utilized. Other embodiments may be possible as well. paper,
To be exact, it is cut into a size that cannot be divided into 24 inches.
In order to do this, the circumferential spacing of the knives around the rollers is suitably adjusted and the cutting process is carried out with a suitably spaced elastic cutting surface 90. To cut the paper, the cutting table thI90 is used, but to cut the saws of different sizes, another cutting table thI90 is used.
A surface 90 is utilized.

According to another embodiment of the invention illustrated in FIGS. 6 and 7, a back-up roller or cylinder 101 rotated by a bearing drive shaft 102 has, for example, A layer of elastic material 107I, such as Estane J 5740X7, commercially available from Gutdrich Chemical Co., is provided.

Figures 8 and 9 show an embodiment of the present invention, in which segments 110 and 11 are made of elastic material.
2 are attached by adhesive or other means to mounting plates 114 and 116 formed of readily machinable metal, such as aluminum. Mounting plates 114 and 116 are configured with protruding portions 117 and 119 which are clamped by dowel nuts 120. Dovetail YIJ nut 120 cooperates with cap screws 121 and 126 to attach the mounting plate to backup roller or cylinder 125. Preferably, a plurality of segments 110 and 11 of elastic material are used to cover the entire outer surface of cylinder 125.
2 is used. As illustrated in FIG. 9, eight segments are provided, each segment being a 45 degree arc, thereby completely surrounding the roller 125 and providing a substantially continuous, uninterrupted elastic cut. give rise to a surface.

In the embodiment illustrated in FIG. 10, a resilient cutting surface 130 is attached to the outer surface of a convex insert 132. In the embodiment illustrated in FIG. The insert is received in a suitably sized cutout 164 spaced around the periphery of the backup roller 136. Insert 162 is attached to the roller by cap screw 167.

Any number of inserts 132 can be used depending on the desired cutting dimensions. In this embodiment, cooperating cylinders or rollers carry one or more cutting knives to cut the paper to the desired dimensions, and the cutting surface 160 functions as a cutting anvil. .

The elastic cutting surface according to the present invention is preferably designed to compress and melt the extruded granules of elastic resinous material and then to cause the molten material to develop a predetermined contour. Manufactured by extrusion through a die opening. The Shiman extrudate is then passed through a cold water trough so that it has sufficient strength to be pulled out of the die by suitable ejection means. It is then cut to the appropriate length.

From the foregoing, it will be apparent that the present invention provides numerous benefits in paper cutting technology. The present invention provides the economic benefit of extending the useful life of expensive cutting knives. The present invention also significantly reduces paper cutting equipment downtime for maintenance, repair or replacement of metal backup or anvil cylinders. Such cost reductions result in lower costs for the printing industry or other customers. Furthermore, the paper cutting device using the present invention has a 9'1 second operation compared to paper cutting using an electric anvil.
'<It's quiet. This significant reduction in noise is of great benefit to the farmer's health.

In addition, paper-cutting front mounting [6] using the present invention has extremely low vibration [7]
1g, which is extremely effective in reducing wear and deformation of the various parts of the device.

Many modifications may be made within the scope of the invention.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a cutting roller and anvil roller used in a rotary paper cutting device formed in accordance with one embodiment of the present invention. FIG. 2 is an exploded perspective view showing a cutter assembly and cutting surface array according to the present invention attached to a backup roller. Figure 3 is an enlarged section of the cut surface according to the book) It=light! 1
■Figure 1. FIG. 4 is an end-to-end view showing the installation of a cutting knife and a mount for a cutting surface arrangement according to one embodiment of the invention. FIG. 5 is a cross-inside diagram of a cut Mi+ and anvil roller made in accordance with another embodiment of the present invention. FIG. 6 is an enlarged perspective view of a portion of the surface of a cylindrical anvil cut 1 formed according to yet another embodiment of the invention. 7 is a cross-sectional view taken along line 7--7 of FIG. 6. FIG. 8 is a cross-sectional view of another embodiment of a cut Njt surface in accordance with the present invention. FIG. 9 is a section III taken along line 9--9 of FIG. FIG. 10 is a cross-sectional view of another embodiment of a cutting surface according to the invention. 10: Cut 1 10-R 12. 14: Knife 20: Bank up roller 22. 24: Elastic cut N [Front side 27: Unwanted web 60. 62. 34. 66: Elastic strip 67. 38.
39.40 Nice slot 42: Mounting block 55: Cut IL, blade ``) 7 Agent's name Kurauchi Tsuhiro:,'' 7-, toko□

Claims (1)

[Claims] 1) A rotary paper cutting device comprising a roller carrying a cutting knife and a second cooperating reeler against which the paper is brought into contact and cut, wherein the second roller is made of an elastic material. A rotary paper cutting device characterized in that it has a cutting surface. 2) A device according to claim 1, characterized in that at least one longitudinally extending strip made of an elastic material is provided on the surface of the 20th-layer. 3) at least one convex, longitudinally extending mount is carried on the surface of the 20th layer, said mount being made of at least one longitudinally extending resilient material;
2. A device according to claim 1, which carries a tube. 4. The device of claim 3, wherein the longitudinally extending strip of elastic material is square in cross section. 5) The apparatus of claim 6, wherein the mount carries a plurality of longitudinally extending strips of elastic material. 6) at least one longitudinally extending elastic material;
2. The device according to claim 1, wherein the IJ knob is carried by a notch in the outer surface of the 20-l. 7) Elastic material) The device according to claim 6, wherein the IJ tube has a square cross section. 8) The apparatus of claim 6, wherein a plurality of longitudinally extending strips of elastic material are carried in a plurality of cut portions in the outer surface of the 20-l. 9) The device according to claim 1, wherein the outer surface of the 20th layer is completely covered with a layer of elastic material. 10) The apparatus of claim 1, wherein a plurality of segments of elastic material are disposed about the periphery of the 20-ra, the number of segments being sufficient to form a complete circle. 11) A convex, longitudinally extending mount is carried in the notch of the second roller, said mount having a layer of elastic material on its outer surface. equipment. 12) The apparatus described in Patent Item 11, wherein the plurality of mounts are spaced apart from each other around the 20th-ra.