Browse Prior Art Database

COMPLIANT STAPLE STACK

IP.com Disclosure Number: IPCOM000026445D
Original Publication Date: 1992-Feb-29
Included in the Prior Art Database: 2004-Apr-05
Document File: 2 page(s) / 89K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed herein are staple cartridge improvements to eliminate the conditions of no staples or jammed staples in the stapler head manufactured by Max Co. Ltd., Tokyo, Japan. The specific feature provides compliance to the staple stack so as to prevent the occurrence of a double sheet feed of staples during an operating cycle.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

~~~~~~ ~

COMPLIANT STAPLE STACK

Stephen R. Partilla

Proposed Classification
U.S. C1.355/308 Int. C1. G03g21/00

WEIGHT

\

WEIGHT

i

+

STAPLE

\ FOAMPAD

WITH MYLAR COVER

WEIGHT RAILS

FIG. 2

I

STAPLE -/- *.)FIG 3 SHEETS

FIG. 7

CARTRIDGE

FIG. 3

FREE TRAVEL

OLD DOWN

SPRING

STAPLE SHEETS

FIG. 4

XEROX DISCLOSURE JOURNAL - Vol. 17, No. 1 January/February 1992 19

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COMPLIANT STAPLE STACK(Cont'd)

Disclosed herein are staple cartridge improvements to eliminate the conditions of no staples or jammed staples in the stapler head manufactured by Max Co. Ltd., Tokyo, Japan. The specific feature provides compliance to the staple stack so as to prevent the occurrence of a double sheet feed of staples during an operating cycle.

An improper feed is the result of the interaction between a tight stack of staples and a weighted hold down spring. Both items are located inside the cartridge housing.

The present hold down spring assembly does not provide an adequate force to overcome a loading force. When a cartridge is loaded into the stapler, a feed belt exerts an upward force on the staple stack to provide the proper positioning of the staples with respect to the feed belt, cartridge, and its internal rails. The gap which is formed must insure that one sheet of staples is fed out of the cartridge at a time. If a staple cartridge contains a tight stack of staples, the upward force applied from the fe...