Apparatus for printing graphic images on sheet material having an ink web cassette with constant web tension
CA 2190240 C · Owner: Gerber Scientific Products, Inc. · Inventors: Loos, William
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A removable cassette (34) having a predetermined length (L) of ink web (W) bearing a printing ink is mounted adjacent to a thermal print head (30) with the ink web interposed between the sheet material and print head for printing graphic images on the sheet. A take-up spool (38) of the cassette defines a first overall diameter (D1) without receiving the ink web (W) from a supply spool (36) of the cassette, and a greater second overall diameter (D2) upon receiving the predetermined length (L) of ink web, wherein the second overall diameter (D2) is no more than 10% greater than the first overall diameter (D1). A spring-wrapped clutch (42) is drivingly connected between a take-up motor (40) …
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 November 13, 1996 and granted April 25, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 13, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2018.
- 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.