Sheet forming apparatus
US4627804A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1986 |
| Grant date | Dec 9, 1986 |
| Priority date | — |
| Expiry date | Mar 14, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C48/919
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for forming double-side polished sheet of thermoplastic resin has a first cooling roll for forming a sheet of thermoplastic synthetic resin thereon along a contact angle .THETA..sub.1, a second cooling roll having a smaller diameter than the first cooling roll and mounted adjacent the first cooling roll for engaging the outer surface of the sheet formed on the first cooling roll and nipping the sheet between the cooling rolls for receiving the sheet from the first cooling roll onto a part of the surface thereof along a contact angle .THETA..sub.2, the second cooling roll being movable along the outer circumference of the first cooling roll for varying the contact angles while continuing to nip the sheet between the cooling rolls, a water tank having at least one guide roller therein and positioned for receiving the sheet directly from the second cooling roll and guiding the sheet from the second cooling roll directly into the water tank, and a water level control in the water tank for varying the water level in accordance with the contact angles for making the distance from the point at which the sheet leaves the second cooling roll to the water level such that the sur…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.