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:
Aug. 14, 1990
Filed:
Mar. 02, 1989
Applicant:
Inventors:
Friedrich Hanstein, Gross-Zimmern, DE;
Karl-Heinz Fehring, Stockstadt/Rh., DE;
Assignee:
Rohm GmbH Chemische Fabrik, Darmstadt, DE;
Primary Examiner:
Int. Cl.
CPC ...
B29C / ;
U.S. Cl.
CPC ...
264522 ; 264548 ; 264336 ;
Abstract
In forming operations on plastic sheets, plates, strips, or tubes (particularly, having highly glossy surfaces) by molding or forming tools, the surface qualities, particularly the gloss, remains undamaged if; (a) the tool is maintained at a temperature in the thermoelastic state region of the plastic until disengagement of the plastic from the tool; and (b) the formed plastic is cooled at its rear side to below the softening temperature, and is disengaged from the forming tool while said tool is hot.