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:
Jun. 11, 1985
Filed:
Apr. 27, 1984
Applicant:
Inventors:
Assignee:
Cibie Projecteurs, , FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29F / ;
U.S. Cl.
CPC ...
2643287 ; 264537 ; 425533 ; 425577 ;
Abstract
A method and apparatus for the production of parts made from plastics material using an injection press in which the mould cavity is defined by a mould surface Sca and the surface Sve of a movable piston. Firstly, the material is introduced into the mould cavity and during injection, the piston is kept stationary for a time to form a rough mould and then retracted to form a parison. Secondly, after injection has been completed the piston is advanced again, and maintained in position while cooling takes place. Thirdly, the mould is opened and the part ejected.