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:
Jan. 14, 2020
Filed:
Apr. 06, 2016
Applicant:
Davis-standard, Llc, Pawcatuck, CT (US);
Inventor:
John P. Christiano, Old Lyme, CT (US);
Assignee:
Davis-Standard, LLC, Pawcatuck, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B29B 7/42 (2006.01); B29C 48/53 (2019.01); B29C 48/535 (2019.01); B29C 48/59 (2019.01); B29C 48/655 (2019.01);
U.S. Cl.
CPC ...
B29B 7/429 (2013.01); B29C 48/53 (2019.02); B29C 48/535 (2019.02); B29C 48/59 (2019.02); B29C 48/655 (2019.02);
Abstract
A screw for a plasticating apparatus has one or more helical flights. A portion of the screw has a plurality of advancing grooves arranged in a noncontinuous helix cut in the screw. The advancing grooves are dimensioned to receive material therein as the material is conveyed through the barrel. The screw has a plurality of noncontinuous cross-cut grooves traversing one or more of the advancing grooves. The cross-cut grooves have a second helix angle greater than the first helix angle and less than ninety degrees; and/or one or more of the cross-cut grooves have a third helix angle of about ninety degrees.