公开(公告)号：US3626165A

公开(公告)日：1971-12-07

申请号：US3626165D

申请日：1969-01-10

Applicant: INDUSTRIAL NUCLEONICS CORP

Inventor： MCCALL ROBERT E

IPC: B29C43/00 ,  B21B13/02 ,  B21B37/28 ,  B21B37/38 ,  B29B15/00 ,  B29C33/00 ,  B29C37/00 ,  B29C43/24 ,  B29C43/58 ,  G05D5/02 ,  G05D21/00 ,  G01D21/00

CPC classification number: B21B37/28 ,  B21B13/023 ,  Y10S162/06 ,  Y10S162/10

Abstract: A control system for a rubber calender incorporates features that improve profile and machine direction thickness control. In one embodiment a single gauge scans continuously across the rubber sheet and is coupled to a first profile average computer (PAC) to average the thickness of one edge zone. While the gauge is scanning the first zone the gauge is also coupled to a second PAC that averages the thickness of a center zone including contiguous portions of the edge zones. The first PAC is used to average the other edge zone. Each averaged edge zone includes substantially the entire half of the sheet width, so that the average of the edge zones is substantially the average of the sheet width and more representative of the portions controlled by adjustment of the respective screwdown motors. The control actions are initiated at points in the operation that decrease the scan cycle duration, and make possible more frequent control actions.