The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 20, 1981
Filed:
Sep. 17, 1979
Jack R Evers, Torrance, CA (US);
Developak Corporation, Redondo Beach, CA (US);
Abstract
This relates to a heat sealer which is particularly adapted for sequentially heat sealing opposite edge portions of a web which has been formed into a tubular configuration. The heat sealer functions after each advancement of the web to seal a portion of the longitudinal side seam of the tube while a forward portion of the tube is cut off and the bottom thereof heat sealed to form a bag. The heat sealer is constructed to simultaneously form heat seals along side seams of two tubes and includes support members for supporting heat sealing members for movement together and then apart to effect the necessary heat sealing operation and then the release of the heat sealed portion. The heat sealer is carried by a wall of the machine and the support members are mounted for axial movement in unison and in opposite directions by drive means which include a fluid pressure device urging the heat sealing members to close to operative positions and a mechanical mechanism for overrriding the pressure device and urging the heat sealing members to open positions.