Browse Prior Art Database

LATCH WITH OVERSIZE DOCUMENT PROTECTOR

IP.com Disclosure Number: IPCOM000022959D
Original Publication Date: 1976-May-31
Included in the Prior Art Database: 2004-Mar-27
Document File: 2 page(s) / 266K

Publishing Venue

Xerox Disclosure Journal

Abstract

A mechanical latch unit 1 for holding down the pivotable platen cover unit 2 of a platen document feeder in a copier. It is designed to allow oversized documents to be copied on the platen 3 without mutilating these documents even if the cover unit 2 is pulled down by the operator against the oversized document, A pivotal latch member 4 on the platen cover unit has a roller 5 on its lower end adjacent a latching hook 6. If no oversize document is present the latching hook 6 auto~ matically engages under a latch catch 7 on the machine frame to hold down the platen cover unit when the cover unit is lowered, The latch member 4 is spring biased to normally engage the catch 7. If, however, an oversized document 8 is laying over the catch 7 area, then the roller 5 cams away the latch member 4 by rolling on the document as the platen cover unit is lowered, thus holding the latch member 4 away from the catch area 7

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

LATCH WITH OVERSIZE DOCUMENT PROTECTOR
Clarence J, Danielson

Proposed Classification
U.S. Cl. 355/3
mt. Cl. G03g 15/00

A mechanical latch unit 1 for holding down the pivotable
platen cover unit 2 of a platen document feeder in a
copier. It is designed to allow oversized documents to
be copied on the platen 3 without mutilating these
documents even if the cover unit 2 is pulled down by
the operator against the oversized document, A pivotal
latch member 4 on the platen cover unit has a roller 5
on its lower end adjacent a latching hook 6. If no
oversize document is present the latching hook 6 auto~
matically engages under a latch catch 7 on the machine
frame to hold down the platen cover unit when the cover
unit is lowered, The latch member 4 is spring biased to
normally engage the catch 7. If, however, an oversized
document 8 is laying over the catch 7 area, then the
roller 5 cams away the latch member 4 by rolling on the
document as the platen cover unit is lowered, thus
holding the latch member 4 away from the catch area 7

Volume 1 Number 5 May 1976 81

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

Page 2 of 2

LATCH WITH OVERSIZE DOCUMENT PROTECTOR (Cont~d)

and preventing damage to the document, as shown by the
dashed line position. That is, the lower end of the latch
member 4 is prevented from punching through the oversize
document, This automatic prevention of latching for
oversize documents is independent of the positioning of
the manual operator un...