US4631109A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single facer
Assignee: Mitsubishi Heavy Industries Ltd
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Filing: 1984-10-30
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Granted: 1986-12-23
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Expires: 2004-10-30
Abstract
Abstract A single facer of the type wherein a core paper sheet is corrugated by means of a pair of upper and lower corrugated rolls and has its crest portions applied with paste, and then a liner introduced from a different direction is pasted on the corrugated core sheet while passing between the lower corrugated roll and a pressure roll to form a single-faced corrugated sheet, is improved in that at least one pair of additional upper and lower corrugated rolls having a different shape of corrugation from first mentioned pair of upper and lower corrugated rolls are supported on a rotatable frame jointly with the first pair of upper and lower corrugated rolls, and structure for rotating the rotatable frame is provided.
Inventors
- 👤 Tadashi Hirakawa
- 👤 Kiyomitsu Yoshikawa
- 👤 Shigenari Yoshioka
- 👤 Hiroaki Sasashige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:55
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/20; B31F1/24; B31F1/26; B31F1/28; B31F1/2845; B31F1/2863; B31F1/2868; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1025
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
178 words
In a single facer of the type wherein a core paper sheet introduced in a first direction is corrugated by means of a pair of upper and lower corrugated rolls, said rolls having a corrugated circumferential configuration, the corrugated core paper sheet has its crest portions applied with paste, and then a liner introduced to said single facer from a second direction different from said first direction is pasted on the corrugated paper sheet while passing between said lower corrugated roll and a pressure roll to form a single-faced corrugated sheet, the improvement wherein: said single facer comprises a rotatable frame supporting said pair of upper and lower corrugated rolls; and at least one pair of additional upper and lower corrugated rolls also is supported from said rotatable frame and has a different shape of circumferential corrugations from that of said first mentioned pair of upper and lower corrugated rolls; and means for rotating said rotatable frame for bringing a selected said pair of corrugated rolls into operative position with said pressure roll for performing a corrugating operation.
Claim 2
Dependent Claim
178 words
In a single facer of the type wherein a core paper sheet introduced in a first direction is corrugated by means of a pair of upper and lower corrugated rolls, said rolls having a corrugated circumferential configuration, the corrugated core paper sheet has its crest portions applied with paste, and then a liner introduced to said single facer from a second direction different from said first direction is pasted on the corrugated paper sheet while passing between said lower corrugated roll and a pressure roll to form a single-faced corrugated sheet, the improvement wherein: said single facer comprises a rotatable frame supporting said pair of upper and lower corrugated rolls; and at least one pair of additional upper and lower corrugated rolls also is supported from said rotatable frame and has a different shape of circumferential corrugations from that of said first mentioned pair of upper and lower corrugated rolls; and means for rotating said rotatable frame for bringing a selected said pair of corrugated rolls into operative position with said pressure roll for performing a corrugating operation.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |