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. 07, 1978
Filed:
Apr. 01, 1977
Applicant:
Inventor:
Carl Siegmann, Bremen, DE;
Assignee:
Firma Heinrich Buhnen KG, Bremen, DE;
Primary Examiner:
Int. Cl.
CPC ...
B05B / ;
U.S. Cl.
CPC ...
23953315 ; 239570 ; 239583 ;
Abstract
A valve for hot melt adhesives is provided with a spring pressed piston urged open by adhesive pressure. A nozzle on the valve has an outlet channel of predetermined volume. Upon termination of fluid pressure the piston retracts through a volume less than the predetermined nozzle outlet channel volume to suck back a limited amount of adhesive to prevent dripping of adhesives.