Patent US3646624A successfully refreshed from Google Patents.
US3646624A
Expired / Lapsed
US
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Disposable drawsheet
Assignee: BRIDGEWATER MANUFACTURING CORP A CORPOF NJ
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Filing: 1969-09-24
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Granted: 1972-03-07
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Expires: 1989-09-24
Abstract
Abstract A drawsheet, suitable for hospital use, is made with a plastic film to which is laminated a highly absorbent nonwoven fabric over only the portion of the sheet that is on top of the mattress when in use. By using low-cost plastic and fabric, and by making the article by a continuous and low-cost method of manufacture, the drawsheet of this invention is suitable for use as a disposable item. Embossed polyethylene film is used and is bonded to a nonwoven cellulose fabric by adhesive applied to the plastic web with the latter folded into a flattened tube so that the adhesive contacts with only one-half of the width of the tube.
Inventors
- 👤 Frederick W Zipf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:26
CPC Classifications
B; B31; B31D; B31D1/00; B31D1/0075; A; A47; A47G; A47G9/00; A47G9/02; A47G9/0238
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
38 words
The disposable drawsheet described in claim 1 characterized by an adhesive coating on the area of the plastic portion that is under the absorbent portion, and the absorbent portion being attached to the plastic portion by said adhesive.
Claim 2
Dependent Claim
40 words
The disposable drawsheet described in claim 2 characterized by the adhesive being permanently tacky for securing the absorbent portion of the drawsheet to the plastic, and the adhesive being of a consistency that is not absorbed by said absorbent portion.
Claim 3
Dependent Claim
34 words
The disposable drawsheet described in claim 1 characterized by an adhesive coating on the plastic covering substantially the entire area of the plastic that is in contact with the absorbent portion of the drawsheet.
Claim 4
Dependent Claim
43 words
The disposable drawsheet described in claim 1 characterized by the plastic portion having an undulatinG surface on at least the top side thereof, and adhesive on at least the high parts of the undulating surface securing the absorbent portion to the plastic portion.
Claim 5
Dependent Claim
95 words
The disposable drawsheet described in claim 5 characterized by the plastic portion being embossed with a waffle pattern over its entire area, the absorbent portion being a highly porous nonwoven fabric secured to the plastic portion entirely by adhesive, and said adhesive being permanently tacky and flexible and of a consistency that is not absorbed by said absorbent portion, the width of the absorbent portion being approximately one-half the width of the plastic portion and the length of both portions of the drawsheet in the direction of the length of the bed being substantially equal.
Claim 6
Dependent Claim
49 words
The disposable drawsheet described in claim 1 characterized by the water-impervious, pliant, plastic portion of the draw sheet having a thickness of approximately 0.001 inch-0.002 inch and the absorbent portion on top of the plastic portion having a thickness of approximately 3/4 to 1 1/2 oz. per sq. yd.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-03-07 | 1975-09-06 | 1976-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-03-07 | 1979-09-06 | 1980-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-03-07 | 1983-09-06 | 1984-03-07 | $7700.00 | Window Closed / Lapsed |