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:
Jul. 02, 1991
Filed:
Dec. 29, 1986
Siegfried H Herliczek, Petersburg, MI (US);
Charles E Ash, Jr, Perrysburg, OH (US);
Stephen P Bartus, Jr, Toledo, OH (US);
Ronald L Toth, Toledo, OH (US);
Libbey-Owens-Ford Co., Toledo, OH (US);
Abstract
The present invention concerns a unique method for producing an anti-lacerative glass assembly wherein a plastic composite anti-laceration sheet is to be bonded to a glass substrate sheet. The plastic anti-laceration sheet includes an inner layer of polyvinyl butyral adpated to abut the glass substrate sheet, an intermediate layer of polyester, and an outer layer of abrasion resistant material. A glass cover sheet having substantially the same curvature as the glass substrate sheet is utilized to press the anti-laceration sheet into bonding engagement with the glass substrate sheet. In accordance with the present invention, the bonding operation is accomplished by heating the laminated glass assembly to a predetermined temperature in the range of 285.degree. F. to 305.degree. F. The present invention also concerns the use of a unique vacuum ring construction which is mounted about the periphery of the laminated assembly and it utilized to de-air the assembly. The vacuum ring is provided with a check valve to maintain the vacuum within the ring during periods wherein it is disconnected from a vacuum source. Further, the method of the present invention includes the step of removing a selected portion or portions of the anti-laceration sheet after it has been bonded to the glass substrate sheet to provide an exposed glass surface for use in mounting the glass assembly into an associated frame. In an alternate method, positioning gasket means can be provided on the glass cover sheet to define a boundary for the anti-laceration sheet and contact the glass substrate sheet to provide an exposed glass surface on the glass assembly.