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. 18, 1980
Filed:
Jul. 31, 1978
William E Watt, Barto, PA (US);
Ashley-Butler, Inc., Somerville, NJ (US);
Abstract
Apparatus and method for making disposable thermometers of a laminated construction containing an array of liquid-crystal droplets, requiring precise registration of the stretchable substrate layer, the droplets and the temperature markings, wherein the substrate film web from which the thermometers are formed is provided with wide margins for handling in the forming machine to provide strength and avoid stretching and heat deformation. The substrate film web is precisely directed through the machine by suitable guide members and is held at the marking, filling, and heat-seal processing stations by suitable vacuum chucks, the chuck at the heat-sealing station being particularly adapted for cooling the web to avoid unwanted heating of the crystal droplets. A cam-operated transporter is used for precisely indexing the movement of the film.