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SOLUTION TO STAPLE BUILD-UP PROBLEM

IP.com Disclosure Number: IPCOM000026055D
Original Publication Date: 1989-Dec-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 69K

Publishing Venue

Xerox Disclosure Journal

Abstract

Sets of stapled copy sheets are built up into balanced stacks by inverting every alternate set before it is added to the stack. In this way the increased thickness caused by staples at one corner or along one edge are distributed evenly on opposite sides of the stack, eliminating any tendency it might otherwise have to slump sideways.

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XEROX DISCLOSURE JOURNAL

SOLUTION TO STAPLE BUILD-UP PROBLEM U.S. C1.355/324
J. W. Badham

Proposed Classification

Int. C1. G03g 21/00

:J

STITCHER

0 EJECTOR

6

Volume 14 Number 6 November/December 1989

313

[This page contains 1 picture or other non-text object]

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SOLUTION TO STAPLE BUILD-UP PROBLEM (Cont'd)

Sets of stapled copy sheets are built up into balanced stacks by inverting every alternate set before it is added to the stack. In this way the increased thickness caused by staples at one corner or along one edge are distributed evenly on opposite sides of the stack, eliminating any tendency it might otherwise have to slump sideways.

In operation, one set 2 is ejected from a stitcher head 3 on to a pivoted flap 4 which, in dropping, pushes one end face of the set by gravity against a sidewall 6 against which the stack is to be formed. The next set is clamped to the flap near its pivot end 7 and moves with it to an upright position. A flipper bar 8 then engages the upper part of the set and pivots the set about its lower end to force the upper end face of the set to come to rest against the sidewall, so that the set is inverted with respect to the first set. The cycles of depositing one set and inverting the next is repeated as necessary.

The base 10 of the stack has to be movable to compensate for the height of the stack and to leave unobstructed the space needed for the set-inversion process.

314

XEROX DISCLOSURE JOURNAL

Volume 14 Number 6 November/D...