Single facer
US4337884A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 15, 1980 |
| Grant date | Jul 6, 1982 |
| Priority date | — |
| Expiry date | Aug 15, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB31F1/2877
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A hollow pressure member is provided adjacent the lower corrugating roll of a single facer to apply pressure for effecting bonding of the corrugated web and the liner web. The pressure member is provided, in the area facing the lower corrugating roll, with an arcuate surface having a curvature equal to or exceeding that of a curve extending through the tips of the flutes of the corrugating roll. The pressure member is of circumferential length at least exceeding the distance between two adjacent flutes of the corrugating roll. In one form of the invention the pressure member is provided with a plurality of threaded openings extending from its hollow interior to the arcuate surface and threaded hollow plugs are received within these openings. Each plug includes an aperture for permitting communication between the hollow interior of the pressure member and the arcuate surface thereof. Within the plug, there is provided a ball which is spring-biased toward an opening in the plug at the arcuate surface of the pressure member and closes this opening in the absence of external force. When single-faced board is being manufactured, the balls are forced inwardly against the spring bias, pro…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.