US4000968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent press cycle for automatic washer
Assignee: Whirlpool Corp
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Filing: 1975-11-13
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Granted: 1977-01-04
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Expires: 1995-11-13
Abstract
Abstract A method for minimizing setting of wrinkles in fabrics, particularly permanent press fabrics, during a liquid extraction cycle by adding moisture to the fabrics while they are being centrifuged to maintain their level of moisture content above a predetermined value.
Inventors
- 👤 Joy A. Schrage
- 👤 John William Pielemeier
- 👤 James I. Czech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:55
CPC Classifications
D; D06; D06F; D06F23/00; D06F23/04; D06F39/00; D06F39/08
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
72 words
In a method of washing permanent press fabric wherein the permanent press fabric is agitated in a washing liquid, rinsed in a rinsing liquid after removal of the washing liquid and then centrifuged to remove the rinsing liquid, the improvement comprising the step of: adding moisture to the permanent press fabric during centrifuging to maintain the moisture level above a desired level to minimize setting of wrinkles in the permanent press fabric.
Claim 2
Dependent Claim
72 words
In a method of washing permanent press fabric wherein the permanent press fabric is agitated in a washing liquid, rinsed in a rinsing liquid after removal of the washing liquid and then centrifuged to remove the rinsing liquid, the improvement comprising the step of: adding moisture to the permanent press fabric during centrifuging to maintain the moisture level above a desired level to minimize setting of wrinkles in the permanent press fabric.
Claim 3
Dependent Claim
32 words
The improvement set forth in claim 1, wherein the step of adding moisture is further defined as adding moisture to maintain a moisture level in the range of 55 to 65 percent.
Claim 4
Independent Claim
92 words
A method of washing permanent press items comprising the steps of placing the items in a receptacle, adding wash liquid to the receptacle, agitating the items and the wash liquid within the receptacle, removing the wash liquid from the receptacle, adding rinse liquid to the receptacle, and removing the rinse liquid from the receptacle and centrifuging the rinse liquid from the items while adding moisture to the items to maintain the moisture content of said items above a desired level, whereby the setting of wrinkles in the permanent press items is minimized.
Claim 5
Independent Claim
92 words
A method of washing permanent press items comprising the steps of placing the items in a receptacle, adding wash liquid to the receptacle, agitating the items and the wash liquid within the receptacle, removing the wash liquid from the receptacle, adding rinse liquid to the receptacle, and removing the rinse liquid from the receptacle and centrifuging the rinse liquid from the items while adding moisture to the items to maintain the moisture content of said items above a desired level, whereby the setting of wrinkles in the permanent press items is minimized.
Claim 6
Independent Claim
185 words
A method of laundering permanent press items in a laundry apparatus of the type which has a rotatable receptacle forming a laundering zone for receiving the permanent press items and in which the items are laundered in separate washing, rinsing and liquid extraction periods of an operational cycle, comprising the steps of: adding wash liquid to the receptacle; agitating the items and the wash liquid in the receptacle during the washing period of the operational cycle; removing the wash liquid from the receptacle; adding rinse liquid to the receptacle to remove detergent and washing additives from the items during the rinsing period of the operational cycle; removing the rinse liquid from the receptacle at the end of the rinsing period of the operational cycle; rotating the receptacle at a high speed during the rinsing period and during the subsequent liquid extraction period of the operational cycle; and adding a selected quantum of moisture to the permanent press items during the liquid extraction period to maintain the moisture level of the items above a predetermined level to prevent the setting in of wrinkles in the items.
Claim 7
Independent Claim
185 words
A method of laundering permanent press items in a laundry apparatus of the type which has a rotatable receptacle forming a laundering zone for receiving the permanent press items and in which the items are laundered in separate washing, rinsing and liquid extraction periods of an operational cycle, comprising the steps of: adding wash liquid to the receptacle; agitating the items and the wash liquid in the receptacle during the washing period of the operational cycle; removing the wash liquid from the receptacle; adding rinse liquid to the receptacle to remove detergent and washing additives from the items during the rinsing period of the operational cycle; removing the rinse liquid from the receptacle at the end of the rinsing period of the operational cycle; rotating the receptacle at a high speed during the rinsing period and during the subsequent liquid extraction period of the operational cycle; and adding a selected quantum of moisture to the permanent press items during the liquid extraction period to maintain the moisture level of the items above a predetermined level to prevent the setting in of wrinkles in the items.
Claim 8
Dependent Claim
48 words
The method of laundering permanent press items as set forth in claim 4, wherein the step of adding a selected quantum of liquid is further defined as: feeding a stream of liquid into the receptacle; atomizing the stream of liquid; and deflecting the atomized liquid onto the items.
Claim 9
Dependent Claim
44 words
The method of laundering permanent press items as set forth in claim 4, wherein the step of adding a quantum of liquid is further defined as: selecting a quantum of liquid to provide a moisture content in the range of 55 to 65 percent.
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) | 1980-01-04 | 1980-07-05 | 1981-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-04 | 1984-07-05 | 1985-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-04 | 1988-07-05 | 1989-01-04 | $7700.00 | Window Closed / Lapsed |