Method and apparatus for multipoint dispensing of viscous material
CA 1235338 A · Owner: American Telephone And Telegraph Company · Inventors: Schoenthaler, David; Wojcik, Thaddeus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multipoint dispensing of viscous material onto a board comprises the monitoring and controlling of several process parameters such as the initial gap between a dispensing tool and the board, the dispense pressure time cycle within the tool and the tool velocity cycle. Also an improved method for loading solder paste into the dispensing tool includes applying vacuum to two regions of the tool while vibrating it in its axial direction . Furthermore improved techniques for preventing crust formation on the paste within the tool and for controlling, the viscosity of the solder paste within the tool achieve, consistent dispensing results in a production environment.
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 April 19, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 19, 2005.
- 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.