Calender
US3936258A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 30, 1974 |
| Grant date | Feb 3, 1976 |
| Priority date | — |
| Expiry date | Jan 30, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C43/245
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A calender especially suitable for use with rubber and plastic material. One of two opposed rolls is movable toward and away from the other through direct action of long-stroke fluid actuators that move the bearing boxes on opposite ends of the movable roll. Roll spacing is directly sensed by position-sensitive transducers acting between opposed bearing boxes and responsive to the relative roll positions. The transducers signal changes and initiate correction to retain roll spacing at a set distance. The fluid actuators are controlled to separate the rolls upon power failure and to prevent roll contact in the event work product is not between the rolls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.