US3793110A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of water tight protective coverings
Assignee: Individual
•
Filing: 1971-02-22
•
Granted: 1974-02-19
•
Expires: 1991-02-22
Abstract
Abstract A water tight covering, e.g., a bathing cap, limb covering, etc. having at its mouth, an inner, annular coated margin of pressuresensitive adhesive overlain by a strippable tape is constructed by juxtaposing two films of thin, flexible thermoplastic material. Each film has an outwardly facing straight narrow zone covered with a pressure sensitive adhesive. The zones on the two films are registered. On each film, the adhesive is backed by a thin, flexible vehicle web which is not readily autogenuously welded. The juxtaposed films, together with the vehicle webs, are placed between a platen and a rule die of a high frequency dielectric welding device. Die strips of the rule die cut along the entire outline of the protective covering and peripherally bond the juxtaposed films except at the mouth of the covering. Portions of the vehicle webs are coincident with the mouth of the protective covering and are cut by the die to form the strippable tapes. The webs are not affected by the dielectric bonding operation yet allow portions of the films which are sandwiched between the webs and the adhesive coatings to bond together. The covering is subsequently turned inside out. Because the webs do not bond to the films, they can be easily peeled off to expose the pressure sensitive adhesive.
Inventors
- 👤 C Saunders
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 13:48
CPC Classifications
B; B32; B32B; B32B27/00; B32B27/06; B32B27/08; A; A42; A42B; A42B1/00; A42B1/04; A42B1/12; B29; B29C; B29C65/00; B29C65/02; B29C65/04; B29C65/74; B29C65/743; B29C65/7441; B29C65/78; B29C65/7858; B29C65/7888; B29C65/7891; B29C66/00; B29C66/004; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/45; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29C66/834; B29C66/8341; B29C66/83411; B29C66/83413; B29C67/00; B29C67/0014; B29C67/0018; B29C66/432; B29C66/4326; B29C66/70; B29C66/71; B29L; B29L2031/00; B29L2031/48; B29L2031/4807; B29L2031/4814; B29L2031/4828; B32B2437/00; B32B2437/04; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1056
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
196 words
A method of manufacturing protective coverings having an access opening with an inner annular coated margin of pressuresensitive adhesive, said method comprisng juxtaposing two flexible thermoplastic films which are autogeneously weldable, covering registered facing zones of each film with one each of two flexible vehicle webs carrying a film facing pressure sensitive adhesive and with each web being formed of a material not readily autogenously weldable under the same conditions which effect autogenous welding of the films, placing the films and webs between a platen and a rule die of a high frequency welding apparatus with the film zones in registry with the access opening of a protective covering outlined in the rule die, cutting the outline of a protective covering through the films and the films, adhesive coatings and webs at the film zones, dielectrically welding portions of the films to form a peripheral seam of the covering of a first width, dielectrically welding the film ends of the access opening with a sealing edge at the film ends wider than said first width through the adhesive and webs on the zone of each film and stripping the cut covering from the films and webs.
Claim 2
Independent Claim
196 words
A method of manufacturing protective coverings having an access opening with an inner annular coated margin of pressuresensitive adhesive, said method comprisng juxtaposing two flexible thermoplastic films which are autogeneously weldable, covering registered facing zones of each film with one each of two flexible vehicle webs carrying a film facing pressure sensitive adhesive and with each web being formed of a material not readily autogenously weldable under the same conditions which effect autogenous welding of the films, placing the films and webs between a platen and a rule die of a high frequency welding apparatus with the film zones in registry with the access opening of a protective covering outlined in the rule die, cutting the outline of a protective covering through the films and the films, adhesive coatings and webs at the film zones, dielectrically welding portions of the films to form a peripheral seam of the covering of a first width, dielectrically welding the film ends of the access opening with a sealing edge at the film ends wider than said first width through the adhesive and webs on the zone of each film and stripping the cut covering from the films and webs.
Claim 3
Dependent Claim
26 words
A method in accordance with claim 1 wherein the film ends of the access opening are dielectrically welded simultaneously with the peripheral seam of the covering.
Claim 4
Dependent Claim
28 words
A method in accordance with claim 1 further including the step of forcing rule die strips through the films and webs to cut the outline of the covering.
Claim 5
Dependent Claim
24 words
A method in accordance with claim 3 wherein the outline of the covering is cut through the films before the peripheral seam is welded.
Claim 6
Dependent Claim
43 words
A method in accordance with claim 1 further including the step of pressure transferring the adhesive coating from the webs to the films by feeding the webs and films between pressure rollers prior to cutting the outline of the covering through the films.
Claim 7
Dependent Claim
22 words
A method in accordance with claim 1 further including the step of inverting the covering after stripping the covering from the films.
Claim 8
Dependent Claim
22 words
A method in accordance with claim 6 further including the step of stripping the cut web portions to expose the adhesive coating.
Claim 9
Dependent Claim
53 words
A method in accordance with claim 1 wherein the outwardly facing zone extends along a central axis of each film, said method further including the step of simultaneously cutting the outline of two opposed coverings with the access openings of each covering overlying different portions of the same length of the film zones.
Claim 10
Dependent Claim
17 words
A method in accordance with claim 8 wherein the peripheral seams of both coverings are simultaneously welded.
Claim 11
Dependent Claim
35 words
The method as in claim 1, plus the step of turning the cut covering inside out to provide a covering which will adhere to the user after said webs have been stripped off said films.
Claim 12
Dependent Claim
48 words
A method in accordance with claim 1 wherein the dielectric pressure is equalized, to prevent damage to the webs from excessive pressure, by a slightly lowered welding edge of the rule die in the peripheral zones above the thickened web zones at the access mouth of the covering.
References Cited (Backward Citations)
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Cited
US2730720A
Cited
US3075862A
Cited
US3020186A
Cited
US3070805A
Cited
US3419447A
Cited
US3465627A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |