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:
Jul. 06, 1982
Filed:
Aug. 15, 1980
Tadashi Hirakawa, Mihara, JP;
Hiroaki Sasashige, Mihara, JP;
Hiroyuki Takenaka, Hiroshima, JP;
Keiichi Katayama, Hiroshima, JP;
Mitsubishi Jukogyo Kabushiki Kaisha, Tokyo, JP;
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, providing a passage for supply of air from the hollow interior of the pressure member to the area between the arcuate surface and the liner web. This provides a gaseous film between the liner web and the arcuate surface, thereby substantially reducing friction therebetween. In another form of the invention, the aforementioned plugs and spring-biased balls are omitted and the arcuate surface of the pressure member is provided with a plurality of openings which are in continuous communication with the hollow interior of the pressure member. During operation air supplied from a suitable source through the hollow interior passes through these openings and provides a film between the arcuate surface and the liner web to reduce the friction therebetween.