US4472461A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing perforations in an adhesive-coated porous web
Assignee: Kendall Co
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Filing: 1982-07-06
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Granted: 1984-09-18
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Expires: 2002-07-06
Abstract
Abstract An apparatus and method is disclosed herein for producing controlled perforations in an adhesive-coated porous web. A porous, woven or nonwoven web backing material has an adhesive, or the like, coated onto a surface thereof, and prior to drying of the adhesive thereon, a gas, or the like, is directed through a gas perforating means, which incorporates a plurality of apertures therein. While said gas perforating means is variably positioned in contiguous proximity to the moving adhesive-coated porous web, the gas stream impinges on the adhesive-coated porous web, resulting in a plurality of discontinuties or perforations being formed in the adhesive-coated porous web. Various predetermined patterns of perforations in the adhesive-coated web may be obtained by oscillating the gas perforating means in different directions, altering the physical dimensions of the apertures located in the gas perforating means, altering the spatial pattern of said openings, rotating the gas perforating means during the operation, and the like.
Inventors
- 👤 David A. Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:35
CPC Classifications
B; B05; B05D; B05D3/00; B05D3/04; B26; B26F; B26F1/00; B26F1/26
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
113 words
A method of producing perforations in an adhesive-coated porous web, which comprises the steps of: imparting movement to a porous web; depositing an adhesive on said moving porous web; orienting said moving, porous web into substantially contiguous proximity to a gas perforating means: directing a regulated jet stream of gas through at least one opening in said gas perforating means; impinging said gas jet stream into contact with at least one adhesive region of said moving, porous web, and the velocity of said jet stream of gas being sufficient to cause displacement of said adhesive in said gas impinged regions of the porous web, thereby resulting in discrete discontinuities in the adhesive-coating thereon.
Claim 2
Independent Claim
113 words
A method of producing perforations in an adhesive-coated porous web, which comprises the steps of: imparting movement to a porous web; depositing an adhesive on said moving porous web; orienting said moving, porous web into substantially contiguous proximity to a gas perforating means: directing a regulated jet stream of gas through at least one opening in said gas perforating means; impinging said gas jet stream into contact with at least one adhesive region of said moving, porous web, and the velocity of said jet stream of gas being sufficient to cause displacement of said adhesive in said gas impinged regions of the porous web, thereby resulting in discrete discontinuities in the adhesive-coating thereon.
Claim 3
Dependent Claim
39 words
A method of producing perforations in an adhesive-coated porous web according to claim 1, wherein said gas perforating means has a plurality of openings incorporated therein, thereby resulting in a plurality of discrete discontinuities in said adhesive coating thereon.
Claim 4
Dependent Claim
24 words
A method of producing perforations in an adhesive-coated porous web according to claim 1 or claim 2, wherein said discrete discontinuities are substantially apertures.
Claim 5
Dependent Claim
24 words
A method of producing perforations in an adhesive-coated porous web according to claim 1 or claim 2, wherein said discrete discontinuities are substantially groove-like.
Claim 6
Dependent Claim
22 words
A method of producing perforations in an adhesive-coated porous web according to claim 1 or claim 2, wherein said gas is air.
Claim 7
Dependent Claim
22 words
A method of producing perforations in an adhesive-coated porous web according to claim 1 or claim 2, wherein said gas is steam.
Claim 8
Dependent Claim
29 words
A method of producing perforations in an adhesive-coated porous web according to claim 1 or claim 2, wherein said gas is a suitable non-reactive liquid in a vapor state.
Claim 9
Dependent Claim
25 words
A method of producing perforations in an adhesive-coated porous web according to claim 1 or claim 2, wherein said adhesive is a pressure sensitive adhesive.
Claim 10
Dependent Claim
26 words
A method of producing perforations in an adhesive-coated porous web according to claim 1 or claim 2, wherein said adhesive-coating is substantially non-porous to a gas.
Claim 11
Dependent Claim
26 words
A method of producing perforations in an adhesive-coated porous web according to claim 1 or claim 2, wherein said porous web material is a woven material.
Claim 12
Dependent Claim
27 words
A method of producing perforations in an adhesive-coated porous web according to claim 1 or claim 2, wherein said porous web material web is a nonwoven material.
Claim 13
Dependent Claim
27 words
A method of producing perforations in an adhesive-coated porous web according to claim 1 or claim 2, wherein said web material is substantially porous to a gas.
Claim 14
Dependent Claim
22 words
A method of producing perforations in an adhesive-coated porous web, according to claim 1, wherein said porous web is a natural material.
Claim 15
Dependent Claim
22 words
A method of producing perforations in an adhesive-coated porous web according to claim 1, wherein said porous web is a synthetic material.
Claim 16
Dependent Claim
24 words
A method of producing perforations in an adhesive-coated porous web according to claim 1 or claim 2, wherein said gas perforating means is oscillating.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-09-18 | 1988-03-19 | 1988-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-09-18 | 1992-03-19 | 1992-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-09-18 | 1996-03-19 | 1996-09-18 | $7700.00 | Window Closed / Lapsed |