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:
May. 31, 1994
Filed:
Mar. 04, 1992
Kenneth A Johnsen, Piscataway, NJ (US);
Keith T Ferguson, Scotch Plains, NJ (US);
E. R. Squibb & Sons, Princeton, NJ (US);
Abstract
A plastic annular disk has a convex exterior surface upon which is situated an adhesive wafer. A removable protective shield is formed to have a substantially wrinkle-free surface with a contour identical to that of the convex surface. The disk and wafer are placed in a vacuum chamber, below a planar plastic sheet. The top of the chamber is heated. The space above the sheet is evacuated to draw the sheet against the heated surface. The remaining portion of the chamber is then evacuated to eliminate air between the wafer and disk. Lastly, the top of the chamber is vented such that the heated sheet is pressed over the wafer and disk.