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. 27, 1986
Filed:
Aug. 03, 1983
Paul Grant, Nabnasset, MA (US);
Chester Petkiewicz, Lowell, MA (US);
Pellon Corporation, Lowell, MA (US);
Abstract
In the formation of an envelope or jacket for a disc, comprising laminating a nonwoven fabric to a plastic sheet, superposing two such laminates with the nonwoven fabrics facing each other, and joining such superposed laminates along all edges but one, thereby to form an envelope, the improvement which comprises effecting the laminating by providing a fusible layer between the nonwoven fabric and plastic sheet and heating to soften the fusible layer while pressing to join the nonwoven fabric to the plastic. The low melting fusible layer eliminates the tendency, in its absence, to pull particles of the jacket plastic through the nonwoven liner layer where it could damage the object to be encased in the envelope. Advantageously the fusible layer is a spray spun low melting polyester which, in addition to polyvinylchloride, is bondable to polycarbonate.