Browse Prior Art Database

Original Publication Date: 1976-May-31
Included in the Prior Art Database: 2004-Mar-27

Publishing Venue

Xerox Disclosure Journal


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