Patent US4547254A successfully refreshed from Google Patents.
US4547254A
Expired / Lapsed
US
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Apparatus for bonding sheet material
Assignee: Ecoboard Ltd
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Filing: 1982-09-24
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Granted: 1985-10-15
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Expires: 2002-09-24
Abstract
Abstract Three paperboard webs are glued to one another with as little expenditure of energy as possible. After leaving the gluing apparatus, the finished sheets cut to size are ready for shipment. The middle paperboard web is passed through between two steel rolls which apply glue homogeneously to both sides of the web. High linear pressure is produced in the region of the generatrices of the steel rolls respectively touching the web. Such pressure is necessary in order that a highly viscous polymeric synthetic or natural adhesive, preferably with a solids content of more than 50%, can be used. No special drying facilities are needed, and the water-soluble glue allows recycling without problems.
Inventors
- 👤 Kurt Berner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:10
CPC Classifications
D; D21; D21H; D21H23/00; D21H23/02; D21H23/22; D21H23/52; D21H23/56; B; B05; B05C; B05C1/00; B05C1/04; B05C1/08; B05C1/0826; B05C1/0834; B05C9/00; B05C9/04; B31; B31F; B31F5/00; B31F5/04; B32; B32B; B32B37/00; B32B37/12; B32B37/1284; D21H27/00; D21H27/30; D21H27/32; D21H5/00; D21H5/0005; D21H5/0025; D21H5/003; B31B; B31B50/00; B31B50/60; B31B50/62; B31B50/622; Y; Y10; Y10T; Y10T156/00; Y10T156/17; Y10T156/1702; Y10T156/1712; Y10T156/1741
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
Apparatus for adhesively joining a plurality of flexible webs of material comprising: two first rolls having rigid surfaces, capable of being set in rotation and being pressed against one another, for applying an adhesive to one or both sides of a web of material to be coated with adhesive, four second rolls having flexible surface coverings, disposed laterally relative to said first rolls and in contact therewith during operation, for homogeneously distributing said adhesive on said first rolls, at least one feed means for said adhesive, and a pressing arrangement for adhesively joining said webs of material.
Claim 2
Dependent Claim
97 words
Apparatus for adhesively joining a plurality of flexible webs of material comprising: two first rolls having rigid surfaces, capable of being set in rotation and being pressed against one another, for applying an adhesive to one or both sides of a web of material to be coated with adhesive, four second rolls having flexible surface coverings, disposed laterally relative to said first rolls and in contact therewith during operation, for homogeneously distributing said adhesive on said first rolls, at least one feed means for said adhesive, and a pressing arrangement for adhesively joining said webs of material.
Claim 3
Dependent Claim
31 words
The apparatus of claim 1, further comprising a pivoting part connected to at least two of said second rolls for pressing said at least two second rolls against said first rolls.
Claim 4
Dependent Claim
34 words
The apparatus of claim 1, wherein said pressing arrangement comprises four third rolls and two rubber sheets respectively guided over two each of said third rolls, said sheets being in contact with one another.
Claim 5
Dependent Claim
20 words
The apparatus of claim 3, further comprising a plurality of pressing rolls for pressing said rubber sheets against one another.
Claim 6
Dependent Claim
14 words
The apparatus of claim 1, further comprising counter-bending means disposed before said first rolls.
Claim 7
Dependent Claim
34 words
Apparatus according to any one of the claims 1 or 2 to 5, wherein said first rolls are disposed laterally off-set so that their axes of rotation do not lie vertically above one another.
References Cited (Backward Citations)
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GB444652A
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US2554988A
Cited
US2566249A
Cited
FR1214821A
Cited
US3690981A
Cited
US4198446A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-10-14 | 1989-04-15 | 1989-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-10-14 | 1993-04-15 | 1993-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-10-14 | 1997-04-15 | 1997-10-15 | $7700.00 | Window Closed / Lapsed |