# US 7,744,519 B2 · System and method for crumpling paper substrates

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- Number: US 7,744,519 B2
- Document ID: US7744519B2
- Status: Granted
- Kind: B2
- Application number: 11/811,862
- Filed: 2007-06-12
- Published: 2008-03-20
- Granted: 2010-06-29
- Earliest claimed: 2006-09-14
- Assignees: Pregis Innovative Packaging LLC
- Inventors: Thomas Wetsch; Robert Tegel
- Web page: https://patentgrep.com/patent/US7744519B2

## CPC

- B31D 5/0052: {involving rollers}
- B31D 2205/0023: as web from a roll
- B31D 2205/0047: Feeding, guiding or shaping the material
- B31D 2205/0058: Cutting; Individualising the final products
- Y10S 493/967: Dunnage, wadding, stuffing, or filling excelsior
- B31D: MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C (manufacture by dry processes of articles made from particles or fibres consisting of wood or other lignocellulosic or like organic material B27N; making layered products not composed wholly of paper or cardboard B32B; making articles from cellulosic fibrous suspensions, e.g. wood pulp, D21J)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS

## Abstract

The present subject matter relates generally to a system and a method for crumpling paper substrates. Specifically, the system and method provide for the crumpling of paper substrates to form fill material to be utilized in product packaging to fill void space and/or to wrap around products thereby allowing for safe transport of the products. The system comprises, generally, a paper crumpling machine having a braking mechanism for preventing uncontrolled rolling of a paper roll, a rake for effectively guiding paper sheeting into the paper crumpling machine, and a disengagement mechanism for easily disengaging the paper sheeting from the apparatus if necessary, and an automatic tensioning device for providing even distribution of tension on the paper sheeting. In addition, the apparatus comprises a cutting mechanism and/or a clamping mechanism for allowing cutting and/or clamping of the crumpled paper substrate.

## Claims

### Claim 1

A crumpling apparatus for crumpling a length of sheeting material for making a cushioning product comprising:
a feeder for feeding sheeting material, wherein said feeder comprises a guide having a plurality of longitudinally disposed tines for guiding said sheeting material and disposing a wave pattern in said sheeting material, wherein said tines are curved longitudinally; and
a crumpling mechanism for crumpling the sheeting material from the feeder.

### Claim 2 (depends on 1)

The apparatus of claim 1, wherein the tines are arranged to define an imaginary surface disposed over said tines, over which the sheeting material is directed, that is curved laterally and longitudinally.

### Claim 3 (depends on 1)

The apparatus of claim 1, further comprising at least one arm laterally disposed from said plurality of tines for guiding said sheeting material over said tines, wherein outer ends of the arm are curved inwards to fold outer edges of the sheeting material for reducing tension therein.

### Claim 4 (depends on 3)

The apparatus of claim 3, wherein said at least one arm is configured for bending the outer edges of the sheeting material.

### Claim 5 (depends on 1)

The apparatus of claim 1, further comprising a neck at about the end of said guide, wherein said neck is capable of reducing the lateral width of sheeting material formed into the wave pattern that is fed thereinto.

### Claim 6 (depends on 5)

The apparatus of claim 5, wherein said neck comprises at least one roller.

### Claim 7 (depends on 1)

The apparatus of claim 1, wherein the width of said guide is between one-half and three-quarters of the maximum width of the sheeting material capable of being fed into the apparatus.

### Claim 8 (depends on 1)

The apparatus of claim 1, wherein the tines are curved longitudinally such that the guide is of a curved convex shape having a larger surface area where the sheeting material enters the guide that transitions into a smaller surface area where the sheeting material exits the guide such that the sheeting material forms the wave pattern.

### Claim 9 (depends on 1)

The apparatus of claim 1, wherein the tines are spaced from each other laterally to define spaces therebetween, such that sheeting material pulled over the tines is biased into the spaces to form the wave pattern due to the longitudinal curvature of the tines.

### Claim 10 (depends on 9)

The apparatus of claim 9, wherein the guide has a longitudinally curved convex shape configured to cause the sheeting material to be pulled into the spaces to form the wave pattern.

### Claim 11 (depends on 10)

The apparatus of claim 10, wherein tines are disposed with respect to each other along a laterally curved shape such that the guides are collectively arranged in a laterally curved convex shape to decrease tension at the edges of the sheeting material as the sheeting material passes over the tines.

### Claim 12 (depends on 1)

The apparatus of claim 1, wherein the longitudinal curvature of the guide is configured to cause the sheeting material to change direction from a point of entry into the guide to a point of exit from the guide to increase tension of the sheeting material against the tines for pulling the sheeting material into the spaces.

### Claim 13

An apparatus for crumpling a length of sheeting material for making a cushioning product, comprising:
a feeder for feeding sheeting material;
a first roller connected to a drive mechanism;
a second roller disposed adjacent said first roller wherein said sheeting material travels between the first roller and the second roller and further wherein the second roller pushes said sheeting material against said first roller to engage the sheeting material with the first roller; and
a magnet having a magnetic force for holding said second roller adjacent said first roller, the magnet and second roller being configured for allowing the second roller to automatically move away from said first roller to disengage the sheeting material from the first roller when the sheeting material overloads between the first roller and second roller and creates a force that exceeds a magnetic force of the magnet.

### Claim 14 (depends on 13)

The apparatus of claim 13, further comprising a handle which assists in moving said second roller away from said first roller.

### Claim 15 (depends on 13)

The apparatus of claim 13, wherein said second roller is configured for changing the tension applied to the sheeting material as the sheeting material travels between the first roller and the second roller.

### Claim 16 (depends on 13)

The apparatus of claim 13 further comprising:
a first arm attached to a pivot point wherein said second roller is attached to said arm, wherein said second roller is magnetically held adjacent said first roller.

### Claim 17 (depends on 16)

The apparatus of claim 16 further comprising:
a second arm attached to said pivot point wherein said first arm is magnetically held to said second arm for holding said second roller adjacent said first roller.

### Claim 18 (depends on 16)

The apparatus of claim 16 further comprising:
a pivotable door attached to said pivot point and a third roller attached to said pivotable door, said first arm magnetically held to said pivotable door for holding said second roller adjacent said first roller, wherein said sheeting material traverses under said third roller causing upward pressure on said third roller; and
said pivotable door interconnected with said first arm at said pivot point, wherein upward pressure on said third roller causes tension applied against said first roller by said second roller to increase.

### Claim 19 (depends on 13)

The apparatus of claim 13, wherein the feeder comprises a guide having a plurality of longitudinally disposed tines for guiding said sheeting material and disposing a wave pattern in said sheeting material, wherein said tines are curved longitudinally.

### Claim 20

An apparatus for crumpling sheeting material for making a cushioning product, comprising:
a holder for a roll of sheeting material, said holder comprising a brake arm having a tapered cap for disposing in an opening of said roll of sheeting material such that the cap brakes the spin of the roll as sheeting material is removed from said roll;
a guide comprising a plurality of longitudinally curved tines spaced apart from each other laterally to define a plurality of empty spaces between the plurality of longitudinally curved tines for creating troughs in the sheeting material, for guiding the sheeting material and disposing a wave pattern in said sheeting material when viewed as a cross-section of said sheeting material;
a crumpling zone disposed downstream said guide, wherein the crumpling zone crumples the sheeting material fed thereinto by the guide, said crumpling zone comprising a drive roller and a pinch roller, the drive roller and pinch roller pulling the sheeting material from the holder and applying tension to the sheeting material such that the sheeting material pulled over the tines is biased into the empty spaces to form a wave pattern due to the longitudinal curvature of the tines, and said sheeting material disposed between the drive roller and said pinch roller, said drive roller and said pinch roller crumpling said sheeting material traveling therebetween; and
a cutting mechanism for cutting said sheeting material after said sheeting material has been crumpled.

### Claim 21 (depends on 20)

The apparatus of claim 20, wherein said pinch roller is configured for-moving away from said drive roller to disengage the sheeting material from the drive roller.

### Claim 22 (depends on 20)

The apparatus of claim 20, wherein said pinch roller is configured for automatically moving away from said drive roller upon an overload of sheeting material between said pinch roller and said drive roller.

### Claim 23 (depends on 20)

The apparatus of claim 20, wherein the tines are arranged to define an imaginary surface disposed over said tines that is curved laterally.

### Claim 24 (depends on 20)

The apparatus of claim 20, wherein said pinch roller is magnetically held against said drive roller.

### Claim 25 (depends on 20)

The apparatus of claim 20, wherein the guide is of a convex shape having a larger surface area where the sheeting material enters the guide that transitions into a smaller surface area where the sheeting material exits the guide such that the sheeting material forms the wave pattern.

### Claim 26

An apparatus for crumpling a length of sheeting material for making a cushioning product comprising:
a support member configured for supporting a supply of sheeting material;
a feeder configured for feeding the sheeting material from the supply mechanism to a crumpling mechanism, wherein said feeder comprises a guide comprising a plurality of longitudinally curved members spaced apart from each other laterally about an imaginary surface that is convex both longitudinally and laterally, defining a plurality of empty spaces therebetween such that the sheeting material under tension is pulled over the plurality of longitudinally curved members and is biased into the empty spaces to form a wave pattern due to the longitudinal curvature of the members; and
a drive mechanism configured for applying sufficient tension in the sheeting material over the feeder for forming the wave pattern.

### Claim 27 (depends on 26)

The apparatus of claim 26, wherein the longitudinally curved members comprise longitudinally curved tines.

### Claim 28 (depends on 27)

The apparatus of claim 27, wherein the guide has a longitudinally curved convex shape configured to cause the sheeting material to be pulled into the empty spaces to form the wave pattern, and the tines are arranged to define an imaginary surface disposed over said tines, over which the sheeting material is directed, that is curved laterally and longitudinally, such that tension is decreased at edges of the sheeting material as the sheeting material passes over the tines.