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:
Jul. 05, 1977
Filed:
Jan. 29, 1976
Robert L Ornsteen, Cape Neddick, ME (US);
Ornsteen Chemicals, Inc., Seabrook, NH (US);
Abstract
A hot melt adhesive gun employing a cartridge of thermoplastic adhesive contained within a chamber made of a thermally insulative non-stick material. A plunger is driven into engagement with the cartridge by a manually operative trigger actuated infinite resolution ratchet to urge the cartridge into melting contact with an electrical heater block and to provide pressure for driving the melting adhesive into a storage reservoir and out through a valved nozzle for application to a bonding surface. A partially melted portion of the cartridge deforms under the applied pressure of the plunger to form a seal against backflow of molten adhesive. Upon release of the trigger, a retraction mechanism causes the plunger to retract a predetermined amount to disengage the cartridge thereby allowing closure of the nozzle valve and arresting of adhesive flow.