Screw/cap assemblies and their manufacture
CA 1311949 C · Owner: Hewison, George David · Inventors: Hewison, George David; Day, Robert Henry
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
It is known for coloured plastics caps to be pushed by a customer onto heads of metal screws after the, screws have been secured to sheets of coloured cladding or roofing. It is also known for the caps to be moulded around the screw heads by a manufacturer. In the present invention, a screw/cap assembly is formed by sticking an initially separate cap onto the head of a screw by an adhesive, such as an epoxy resin sufficiently strong to allow the screw to be driven while the cap is in place. The intention is that the manufacturer would keep stocks of the caps and stocks of the screws of different types and only stick chosen caps onto the heads of chosen screws in response to specific orders …
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
- Granted December 29, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 29, 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.
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.