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:
Nov. 02, 1976
Filed:
Feb. 27, 1975
Applicant:
Inventor:
Gary L Sheldon, Pullman, WA (US);
Assignee:
Evans Products Company, Portland, OR (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65C / ;
U.S. Cl.
CPC ...
156443 ; 2920 / ; 156499 ; 156568 ;
Abstract
An apparatus for forming envelopes from thermoplastic sheet material including means for feeding said sheets at predetermined intervals along a conveyor means, means for heating the thermoplastic sheet along a narrow transverse zone, means for moving the heated sheet into contact with a curved surface which is of such a configuration that the sheet is folded along the heated zone into an envelope, and means for heat sealing the envelope along the side edges thereof.