Patent US3840418A successfully refreshed from Google Patents.
US3840418A
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Method of manufacture of a sanitary article and ply having selectively thickened areas
Assignee: Individual
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Filing: 1972-03-03
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Granted: 1974-10-08
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Expires: 1992-03-03
Abstract
Abstract A sanitary article includes a ply of extruded synthetic resin which is light in weight and which is given increased pin- or tape-retention strength by a selective extrusion process which thickens the film web of resin selectively at the localized points where strength is needed. In the case of a diaper or bed pad or the like, these may comprise either a band transversely across at least one end of the backing ply, or may comprise one or more thickened areas at certain corners. In the case of a fenestrated sheet or bib, the thickened area may be a bead around an opening.
Inventors
- 👤 R Sabee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:39
CPC Classifications
A; A41; A41B; A41B13/00; A41B13/10; A61; A61F; A61F13/00; A61F13/15; A61F13/15577; A61F13/15707; A61F13/15747; A61F13/51; A61F13/514; A61F13/51474; A61F13/51484; A61F13/56; A61F13/5622; B; B32; B32B; B32B27/00; B32B27/12; B32B5/00; B32B5/02; B32B5/022; B29; B29C; B29C48/00; B29C48/001; B29C48/0018; B29C48/0019; B29C48/0021; B29C48/0022; B29C48/03; B29C48/07; B29C48/08; B29C48/12; B29C48/16; B29C48/18; B29C48/21; B29L; B29L2007/00; B29L2007/001; B32B2323/00; B32B2323/04; B32B2323/10
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
77 words
A method of manufacturing a plastic web with at least one selected portioN locally thick as compared with other portions of the web, said method including forcing viscous plastic material through an extruding nozzle in the form of a web of substantial width accelerating the flow of said extruded plastic material for a limited space of time through said nozzle by increasing the pressure on the plastic material to form said locally thick portion of the web.
Claim 2
Independent Claim
77 words
A method of manufacturing a plastic web with at least one selected portioN locally thick as compared with other portions of the web, said method including forcing viscous plastic material through an extruding nozzle in the form of a web of substantial width accelerating the flow of said extruded plastic material for a limited space of time through said nozzle by increasing the pressure on the plastic material to form said locally thick portion of the web.
Claim 3
Dependent Claim
23 words
A method according to claim 1 in which the said extruded material in the form of a web is laminated to another web.
Claim 4
Dependent Claim
15 words
A method according to claim 2 in which other web is also an extruded web.
Claim 5
Dependent Claim
31 words
A method according to claim 1 in which the acceleration of flow of material in the course of extrusion thereof is limited to an area of less width than the web.
Claim 6
Dependent Claim
63 words
A method according to claim 1 in which the increase of pressure on the material in the course of extrusion thereof is momentary to confine the increase in pressure to an area of limited extent laterally of the web, laterally adjacent portions being substantially free of the increase in pressure to provide a locally thick portion only in the area of increased pressure.
Claim 7
Dependent Claim
38 words
A method according to claim 1 which includes the step of laminating a second web to the web first mentioned and in immediate proximity to the point at which the extrusion of the first mentioned web is effected.
Claim 8
Dependent Claim
13 words
A method according to claim 6 in which said second web is paper.
Claim 9
Dependent Claim
52 words
A method according to claim 6 in which the material extruded to form the web is at superatmospheric temperature and the point at which the first and second webs are laminated together is maintained warm at the side of the second web, the first mentioned web being cooled at its opposite side.
Claim 10
Dependent Claim
14 words
A method according to claim 6 in which the second web is a fabric.
Claim 11
Independent Claim
149 words
A method of manufacturing a diaper having a backing ply, a facing ply and an intervening pad, said method including making the backing ply by the extrusion of a web of plastic backing ply material by forcing viscous liquid resin through an extruding nozzle and subjecting said material to localized variation in flow by increasing the pressure on said liquid resin for a brief interval during which the thickness of the web of extruded material is selectively increased to produce thickened portions in a zone of limited width less than that of the web with said thickened portions forming portions of the side margins and end margins of the diaper which extend inwardly from the ends and side edges of the web, the several plies thereafter being assembled upon the pad and the thickened portions of the backing ply providing reinforcement of points at which the diaper is supported.
Claim 12
Independent Claim
149 words
A method of manufacturing a diaper having a backing ply, a facing ply and an intervening pad, said method including making the backing ply by the extrusion of a web of plastic backing ply material by forcing viscous liquid resin through an extruding nozzle and subjecting said material to localized variation in flow by increasing the pressure on said liquid resin for a brief interval during which the thickness of the web of extruded material is selectively increased to produce thickened portions in a zone of limited width less than that of the web with said thickened portions forming portions of the side margins and end margins of the diaper which extend inwardly from the ends and side edges of the web, the several plies thereafter being assembled upon the pad and the thickened portions of the backing ply providing reinforcement of points at which the diaper is supported.
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) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |