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:
Feb. 02, 1993
Filed:
Feb. 22, 1991
Applicant:
Inventor:
Stephen L Merkel, Bay Village, OH (US);
Assignee:
Nordson Corporation, Westlake, OH (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N / ;
U.S. Cl.
CPC ...
73 1905 ; 73 6178 ;
Abstract
A pressure transducer (58) generates an instantaneous pressure of a pressurized liquid, such as an adhesive, sealant, or caulk, being dispensed from a dispenser (52). The signal is received by a filter for filtering out non-bubble pressure disturbances. The filter includes comparators (106, 108); detection circuitry (112, 120) and timers (116, 124) or counters. An alarm indicating the passing of a bubble is indicated in response to signals which pass both the filters.