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Expired Canadian patentCanada

Microprocessor-based press dampening control

CA 1303899 C · Owner: Rockwell International Corporation · Inventors: Ahern, Patrick J.; Michl, Kurt D.; Mitchell, Allen L.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A control system for an offset printing press includes a microprocessor-based dampener, register and ink (drink) processor which controls color register inkrate and damprate. Damprate curve data flood requests and adjustments to, individual nozzles on the spraybar can be downloaded from a master work station to the drink processor and used to control the rate at which the spraybar nozzles are pulsed on and the duration that each separate nozzle remains on.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted June 23, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 23, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 2, 1989
GrantedJune 23, 1992
Term endedJune 23, 2009
Patent numberCA 1303899 C
Classification (IPC)B41F33/00 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedMarch 2, 1989Patent grantedJune 23, 1992Term endedJune 23, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.