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:
Sep. 10, 1991
Filed:
May. 22, 1989
Tuneo Ono, Nagata, JP;
Heishin Sobi Kabushiki Kaisha, Kobe, JP;
Abstract
An improved metering dispenser system for delivering a fixed or variable measured quantity of a high viscosity material such as adhesives or sealants for application to a substrate is disclosed. It uses an Archimedian screw pump having a stator formed with a spiral cavity therethrough, and a spiral rotor which is driven by a variable speed drive motor. The stator has a nozzle attached to its outlet end, the inlet end thereof being in fluid communication with a reservoir for the material. The dispenser system is adapted for use in combination with a robotic system so that the nozzle is manipulated thereby. The rotational speed of the drive motor is controlled in response to a signal representative of a nozzle velocity so that the nozzle can apply a ribbon of the material with a fixed width to the substrate despite nozzle velocity variations. When the nozzle is about to come to a stop, the drive motor is rotated in a reverse direction so as to cause the nozzle to stop discharging the material instantly.