US4750227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Abrasive structures and methods for abrading fabrics
Assignee: Dexter Chemical Corp
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Filing: 1986-10-28
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Granted: 1988-06-14
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Expires: 2006-10-28
Abstract
Abstract An abrasive structure for stone washing garments in a wash medium and a method for abrading garments using that abrasive structure to achieve controlled abrasion of those garments are disclosed. The abrasive structure has a uniform abrasive surface which will not damage or excessively wear fabrics and garments being subjected to the stone washing method, which will not deteriorate during use, and which will provide uniformly stone washed garments having a consistent nap and a low level amount of textile wear. The abrasive structure is formed of a substantially form-retaining material having a resilient abrasive surface. For example, the abrasive structure may be formed of a block of form-retaining material substantially impervious to aqueous washing systems and a resilient layer of synthetic abrasive material substantially surrounding the block and affixed to the exterior surfaces of the block.
Inventors
- 👤 Gregory J. Hopkins
- 👤 Thomas Holst, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:06
CPC Classifications
D; D06; D06B; D06B11/00; D06B11/0093; D06B11/0096; D06F; D06F35/00; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/2395
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
129 words
A method of abrading fabrics in a washing machine comprising the steps of: (1) introducing, into a washing machine (a) fabric, (b) a sufficient quantity of aqueous wash medium to carry out the intended washing operation, and (c) from 0.1 to 5 abrasive structures per pound of fabric, each of said abrasive structures comprising: (i) a block of form-retaining material substantially impervious to aqueous washing systems; and (ii) a resilient layer of synthetic abrasive material substantially surrounding said block and affixed to the exterior surfaces thereof; (2) agitating the fabric in the washing machine until it is uniformly washed and abraded; (3) draining the said aqueous wash medium from the washing machine; and (4) removing the uniformly washed and abraded fabric and said abrasive structures from the washing machine.
Claim 2
Independent Claim
129 words
A method of abrading fabrics in a washing machine comprising the steps of: (1) introducing, into a washing machine (a) fabric, (b) a sufficient quantity of aqueous wash medium to carry out the intended washing operation, and (c) from 0.1 to 5 abrasive structures per pound of fabric, each of said abrasive structures comprising: (i) a block of form-retaining material substantially impervious to aqueous washing systems; and (ii) a resilient layer of synthetic abrasive material substantially surrounding said block and affixed to the exterior surfaces thereof; (2) agitating the fabric in the washing machine until it is uniformly washed and abraded; (3) draining the said aqueous wash medium from the washing machine; and (4) removing the uniformly washed and abraded fabric and said abrasive structures from the washing machine.
Claim 3
Independent Claim
168 words
A method of abrading fabrics in a washing machine comprising the steps of: (1) introducing, into a washing machine (a) fabric, (b) a sufficient quantity of aqueous wash medium to carry out the intended washing operation, and (c) from 0.5 to 10 abrasive structures per pound of fabric, each of said abrasive structures comprising: (i) a block of polypropylene being substantially rectilinear in cross section and having a volume of from 1 to 20 cubic inches and being sized such that no one rectilinear dimension is greater than 5 times any other rectilinear dimension, said block having substantial exterior surface areas; and (ii) a resilient layer of nonwoven synthetic abrasive material affixed to the said exterior surfaces of said block and substantially surrounding said block; (2) agitating the fabric in the washing machine until it is uniformly washed and abraded; (3) draining the said aqueous wash medium from the washing machine; and (4) removing the uniformly washed and abraded fabric and said abrasive structures from the washing machine.
Claim 4
Independent Claim
168 words
A method of abrading fabrics in a washing machine comprising the steps of: (1) introducing, into a washing machine (a) fabric, (b) a sufficient quantity of aqueous wash medium to carry out the intended washing operation, and (c) from 0.5 to 10 abrasive structures per pound of fabric, each of said abrasive structures comprising: (i) a block of polypropylene being substantially rectilinear in cross section and having a volume of from 1 to 20 cubic inches and being sized such that no one rectilinear dimension is greater than 5 times any other rectilinear dimension, said block having substantial exterior surface areas; and (ii) a resilient layer of nonwoven synthetic abrasive material affixed to the said exterior surfaces of said block and substantially surrounding said block; (2) agitating the fabric in the washing machine until it is uniformly washed and abraded; (3) draining the said aqueous wash medium from the washing machine; and (4) removing the uniformly washed and abraded fabric and said abrasive structures from the washing machine.
Claim 5
Independent Claim
105 words
A method of abrading fabrics in a washing machine comprising the steps of: (1) introducing, into a washing machine (a) fabric, (b) a sufficient quantity of aqueous wash medium to carry out the intended washing operation, and (c) from 0.5 to 5 abrasive structures per pound of fabric, each of said abrasive structures comprising a substantially form-retaining material having a resilient synthetic abrasive surface; (2) agitating the fabric in the washing machine until it is uniformly washed and abraded; (3) draining the said aqueous wash medium from the washing machine; and (4) removing the uniformly washed and abraded fabric abrasive structures from the washing machine.
Claim 6
Independent Claim
105 words
A method of abrading fabrics in a washing machine comprising the steps of: (1) introducing, into a washing machine (a) fabric, (b) a sufficient quantity of aqueous wash medium to carry out the intended washing operation, and (c) from 0.5 to 5 abrasive structures per pound of fabric, each of said abrasive structures comprising a substantially form-retaining material having a resilient synthetic abrasive surface; (2) agitating the fabric in the washing machine until it is uniformly washed and abraded; (3) draining the said aqueous wash medium from the washing machine; and (4) removing the uniformly washed and abraded fabric abrasive structures from the washing machine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-06-14 | 1991-12-14 | 1992-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-06-14 | 1995-12-14 | 1996-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-06-14 | 1999-12-14 | 2000-06-14 | $7700.00 | Window Closed / Lapsed |