US3789795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Glue-applying apparatus for corrugated paperboard machine
Assignee: Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH
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Filing: 1972-03-15
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Granted: 1974-02-05
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Expires: 1992-03-15
Abstract
Abstract A smooth surface applicator roll dips into glue in a vat and applies the glue to the crests of the corrugations of a corrugated paper web traveling around a support roll above the vat. A doctor roll is located beside the applicator roll above the glue level in the vat and is pressed against the side of the applicator roll that carries glue upwardly. The doctor roll is rotated in the same direction as the applicator roll to remove glue from it. The doctor roll is provided with grooves extending around it so that laterally spaced strips of glue are left on the applicator roll between the areas of the latter from which glue is removed by the doctor roll. As a result, longitudinally spaced areas of glue are applied to the crest of each paper corrugation by the smooth surface applicator roll.
Inventors
- 👤 H Brandenburg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:32
CPC Classifications
B; B31; B31F; B31F1/00; B31F1/20; B31F1/24; B31F1/26; B31F1/28; B31F1/2818
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
214 words
The combination with a support roll for a traveling corrugated paper web, of glue-applying apparatus comprising a glue vat below the support roll, a smooth surface applicator roll parallel to the support roll and disposed between it and the vat, means rotatably supporting the applicator roll with its bottom portion dipping into glue in the vat and with another portion of the roll positioned to engage the crests of the corrugations of a corrugated paper web traveling around the support roll, means for driving the applicator roll, a doctor roll above the glue level in the vat and parallel to the applicator roll, means rotatably supporting the doctor roll and pressing it against the side of the applicator roll that carries glue upwardly, means for driving the doctor roll in the same direction as the applicator roll to remove glue from the applicator roll, the doctor roll being provided with grooves extending around it to leave laterally spaced strips of glue on the applicator roll, surfaces of the doctor roll between said grooves being substantially the same width as the grooves whereby longitudinally spaced areas of glue will be applied to the crest of each paper corrugation, and a scraper of highly elastic material engaging said surfaces of the doctor roll between said grooves.
Claim 2
Dependent Claim
214 words
The combination with a support roll for a traveling corrugated paper web, of glue-applying apparatus comprising a glue vat below the support roll, a smooth surface applicator roll parallel to the support roll and disposed between it and the vat, means rotatably supporting the applicator roll with its bottom portion dipping into glue in the vat and with another portion of the roll positioned to engage the crests of the corrugations of a corrugated paper web traveling around the support roll, means for driving the applicator roll, a doctor roll above the glue level in the vat and parallel to the applicator roll, means rotatably supporting the doctor roll and pressing it against the side of the applicator roll that carries glue upwardly, means for driving the doctor roll in the same direction as the applicator roll to remove glue from the applicator roll, the doctor roll being provided with grooves extending around it to leave laterally spaced strips of glue on the applicator roll, surfaces of the doctor roll between said grooves being substantially the same width as the grooves whereby longitudinally spaced areas of glue will be applied to the crest of each paper corrugation, and a scraper of highly elastic material engaging said surfaces of the doctor roll between said grooves.
Claim 3
Dependent Claim
23 words
The combination recited in claim 1, in which the depth of said doctor roll grooves is from about 0.1 to about 0.2 mm.
Claim 4
Dependent Claim
43 words
The combination recited in claim 1, in which said grooves are laterally spaced circular grooves, said apparatus including means for reciprocating the doctor roll axially at a frequency depending upon the rpm of that roll to stagger the glue areas on successive corrugations.
References Cited (Backward Citations)
US2714365A
Cited
US3383234A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-04 | 1977-08-06 | 1978-02-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-04 | 1981-08-06 | 1982-02-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-04 | 1985-08-06 | 1986-02-05 | $7700.00 | Window Closed / Lapsed |