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:
Mar. 20, 1984
Filed:
Nov. 27, 1981
William R Coker, Lilburn, GA (US);
Nordson Corporation, Amherst, OH (US);
Abstract
A master control for preventing the operation of a hot melt adhesive pump motor in a hot melt adhesive dispensing system until the adhesive has reached a dispensable molten state. The hot melt adhesive dispensing system includes an adhesive melting tank and a heater for heating the tank, which in turn heats the adhesive. A heater control energizes the heater when the temperature of the tank falls below a predetermined temperature so that, after an initial 'on time', the heater control de-energizes the heater for periods of time of increasing length as the temperature of the adhesive increases. The master control enables the operation of the adhesive pump motor when the 'off time' of the heater exceeds a predetermined period of time. This predetermined period is selected so that at the corresponding adhesive temperature the adhesive is in a dispensable molten condition.