# US 4,398,709 A · Wave generation amplification apparatus for cut sheet paper feeding

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- Number: US 4,398,709 A
- Document ID: US4398709A
- Status: Granted
- Kind: A
- Application number: 06/230,931
- Filed: 1981-02-02
- Granted: 1983-08-16
- Earliest claimed: 1981-02-02
- Assignees: International Business Machines Corporation
- Inventors: Donovan M. Janssen; Robert Magno; William S. Seaward
- Web page: https://patentgrep.com/patent/US4398709A

## CPC

- B65H 9/163: {Tape}
- B65H 3/0646: {Wave generation rollers, i.e. combing wheels}
- B65H: HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES

## Abstract

Device for separating and feeding sheets in seriatim from a stack to a processing station. The device includes a pin which periodically contacts and forms a pivot point on the stack. A rotary wave generator is disposed to rotate about the pivot point. The rotary wave generator periodically contacts a topmost sheet in the stack and shingles (that is separates) the sheet from the stack. The shingled sheet is fed into a paper sheet aligner and into the processing station.

## Claims

### Claim 1

A sheet shingling device for shingling sheets in seriatim from a stack onto a processing station of a utilization apparatus, comprising:
means operable to support a stack of sheets;
a rotary shingler member including free-rolling means disposed to contact the stack periodically, and to rotate in a plane substantially parallel to the plane of the top sheet in the stack;
force application means, comprising a pin and a coil spring connected to said pin, carried by said shingler member and disposed at the center point of a circular orbit generated by said free-rolling means, said pin being spring biased to contact the stack prior to contact by said free rolling means, to thereby impart a restraining force to said sheets prior to a shingling force being imparted to said sheets, so that sheets are shingled at a constant angle from said stack;
sheet feed means disposed relative to the stack, said sheet feed means being operable to receive the shingled sheets, and to reorientate the sheets to conform to a predetermined paper path; and
sheet aligner means disposed within the paper path, said sheet aligner means being operable to align a sheet traversing said path.

### Claim 2 (depends on 1)

The device of claim 1 further including servo-controlled means positioned relative to the sheet aligner means and operable to trap and to feed said sheet in timed relationship to the processing station.

### Claim 3 (depends on 1)

The device of claim 1 further including motor means for rotating the shingler means.

### Claim 4 (depends on 1)

The device of claim 1 further including linear power means coupled to the rotary shingler member, said power means being operable to move the shingler member and said pin in a plane substantially perpendicular to the plane of rotation of the shingler member.

### Claim 5 (depends on 1)

The device of claim 1 further including sensor means disposed relative to the stack, said sensor means being operable to sense the leading edge of a shingled sheet and to output a first set of pulses.

### Claim 6 (depends on 5)

The device of claim 5 further including controller means operable to accept the first set of pulses and to generate a second set of pulses for controlling said linear power means, to thereby control the positioning of said shingler member and said pin relative to the stack.

### Claim 7 (depends on 1)

The sheet handling device of claim 1 wherein the sheet feed means includes a rotating shaft disposed so that its longitudinal axis runs parallel to the lengthwise dimension of the stack;
a pair of drive rollers mounted in spaced relation on said shaft;
a support shaft; and
a pair of back-up rollers mounted on the support shaft, said support shaft being disposed so that the back-up rollers coact with the drive rollers to form feed nips having a contact surface substantially less than the width of a transported sheet.

### Claim 8 (depends on 7)

The sheet handling device of claim 7 wherein the drive rollers have different diameters.

### Claim 9 (depends on 1)

The sheet handling device of claim 1 wherein the sheet aligner means includes a paper sheet guide channel with upper and lower guide plates with the channel therebetween;
an edge aligner member operably coupled to the guide channel; and
a vacuum paper feed belt positioned within the lower guide plate and disposed at an angle to the edge aligner member.