Browse Prior Art Database

CIRCUIT TO DETECT COPIES LONGER THAN NORMAL IN A 3100 LDC COPY MACHINE

IP.com Disclosure Number: IPCOM000023701D
Original Publication Date: 1978-Dec-31
Included in the Prior Art Database: 2004-Mar-31
Document File: 2 page(s) / 273K

Publishing Venue

Xerox Disclosure Journal

Abstract

A circuit to detect and record copies according to length in a copier. Copy sheet trail edge switch 10 is connected to a control gate 11, When switch 10 is actuated by a copy sheet and with an enabling signal (ENABLE) inputted to gate 11, a digital counter 14 is triggered and starts to count, When counter 14 reaches a first preset count, a decode gate 16 responds and triggers SCR 21 which indexes a unit length sheet counter and recorder.

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Page 1 of 2

XEROX DISCLOSURE JOURNAL

CIRCUIT TO DETECT COPIES LONGER
THAN NORMAL IN A 3100 LDC COPY
MACHI NE
Thomas M, LeStrange

Number 6 November/December 1978 427

Proposed Classification
U,S~ C1~ 355/3R
mt. Cl. G03g 15/00

~_

Volume 3

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

Page 2 of 2

CIRCUIT TO DETECT COPIES LONGER THAN NORMAL IN A 3100 LDC
COPY MACHINE (Cont'd)

A circuit to detect and record copies according to length in a
copier. Copy sheet trail edge switch 10 is connected to a
control gate 11, When switch 10 is actuated by a copy sheet
and with an enabling signal (ENABLE) inputted to gate 11, a
digital counter 14 is triggered and starts to count, When
counter 14 reaches a first preset count, a decode gate 16
responds and triggers SCR 21 which indexes a unit length sheet
counter and recorder.

Counter 14 continues to count and on a second preset count, a
second decode gate 17 is triggered setting clear flip~flop18,
Flip~flop 18 clears counter 14 removing the trigger signal to
SCR 21. Clear flip~flop18 is in turn reset on the rising edge
of the clock signal (CLOCK) through inverter 22. The cycle
continues until trail edge switch 10 is deactuated by the copy
sheet passing therebeyond or until the enabling signal
(ENABLE) is removed from control gate 11.

                 XEROX DISCLOSURE JOURNAL
428 Volume 3 Number 6 November/December 1978

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