Feeder for sheet in a sheet-processing machine
CA 2040573 C · Owner: Heidelberger Druckmaschinen Aktiengesellschaft · Inventors: Bergmeier, Dieter; Zeltner, Jurgen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In the feeder for sheets in a sheet-processing machine fanning blowers (4) for separating the top sheets of a sheet pile are directed at the rear edge of the top sheets in the sheet pile. This feeder also features further blower nozzles (9, 10) through which - in synchronism with the operating cycle of the feeder and via a control valve (14) driven in synchronism with the separating device - blast air can be blown under the top sheet, whereby the blast air originates from a separate blast-air source (12) which can be controlled independently of a central blast-air supply system (8).
Read the whole patent
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
- Filed April 16, 1991 and granted August 30, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 16, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 16, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.