US4128909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller for cleaning phonograph records
Assignee: Nagaoka Co Ltd
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Filing: 1977-08-05
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Granted: 1978-12-12
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Expires: 1997-08-05
Abstract
Abstract The Gramophone record cleaner proposed is of the roller type having a sticky surface formed of a rubbery organopolysiloxane elastomer having a relatively low hardness and adapted to pick up dirt or dust and other contaminants from within the grooves of a record as the roller is passed over the record surface. The roller-type cleaners are superior in their easy performance of complete dirt removal in repeated operations, since the sticky surface of the roller once choked with contaminants can be cleaned simply by rinsing with water.
Inventors
- 👤 Hirokazu Kawabe
- 👤 Kiyoshi Imai
- 👤 Masanobu Miyakoshi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:02
CPC Classifications
G; G11; G11B; G11B3/00; G11B3/58; G11B3/589; C; C08; C08L; C08L83/00; C08L83/04; C08G; C08G77/00; C08G77/04; C08G77/12; C08G77/14; C08G77/16; C08G77/18; C08G77/20; C08G77/70; Y; Y10; Y10S; Y10S528/00; Y10S528/901
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
223 words
An improved Gramophone record cleaner of the roller type wherein at least one roller is rotatably supported by and between a pair of opposed, substantially parallel limbs on a handled bracket, the improvement comprising the roller having an outermost layer made of a rubbery organopolysiloxane elastomer having hardness not exceeding 40 as determined in accordance with Japanese Industrial Standard K 6301, the surface of the layer being sticky, the stickiness of the surface of the layer is in the range of 4 to 30 as determined by J. Dow's rolling ball stick test, and said rubbery organopolysiloxane elastomer has a formulation comprising: (a) a diorganopolysiloxane with a viscosity in the range from 100 to 500,000 centistokes at 25° C. represented by the general formula ##STR3## where R is a monovalent hydrocarbon group free of aliphatic unsaturation, such as methyl and phenyl groups and m and n are each positive integers with the proviso that m/(m+n) is between 0.001 and 0.1, (b) an organopolysiloxane with a viscosity not exceeding 10,000 centistokes at 25° C., having 1.5 to 3 hydrogen atoms bonded directly to the silicon atoms per molecule, in an amount such that from 0.01 to 1.0 of the hydrogen atoms bonded directly to the silicon atoms are provided per vinyl group in component (a), and (c) a catalytic amount of a platinum compound.
Claim 2
Dependent Claim
223 words
An improved Gramophone record cleaner of the roller type wherein at least one roller is rotatably supported by and between a pair of opposed, substantially parallel limbs on a handled bracket, the improvement comprising the roller having an outermost layer made of a rubbery organopolysiloxane elastomer having hardness not exceeding 40 as determined in accordance with Japanese Industrial Standard K 6301, the surface of the layer being sticky, the stickiness of the surface of the layer is in the range of 4 to 30 as determined by J. Dow's rolling ball stick test, and said rubbery organopolysiloxane elastomer has a formulation comprising: (a) a diorganopolysiloxane with a viscosity in the range from 100 to 500,000 centistokes at 25° C. represented by the general formula ##STR3## where R is a monovalent hydrocarbon group free of aliphatic unsaturation, such as methyl and phenyl groups and m and n are each positive integers with the proviso that m/(m+n) is between 0.001 and 0.1, (b) an organopolysiloxane with a viscosity not exceeding 10,000 centistokes at 25° C., having 1.5 to 3 hydrogen atoms bonded directly to the silicon atoms per molecule, in an amount such that from 0.01 to 1.0 of the hydrogen atoms bonded directly to the silicon atoms are provided per vinyl group in component (a), and (c) a catalytic amount of a platinum compound.
Claim 3
Dependent Claim
24 words
The roller-type cleaner as claimed in claim 1 wherein said outermost layer has a thickness in the range from 1 mm to 5 mm.
Claim 4
Dependent Claim
29 words
The roller-type cleaner as claimed in claim 1 wherein said rubbery organopolysiloxane elastomer has a compressive stress in the range from 0.05 to 8 kg/cm 2 at 25% compression.
Claim 5
Dependent Claim
191 words
In an improved Gramophone record cleaner of the roller type wherein at least one roller is rotatably supported by and between a pair of opposed, substantially parallel limbs on a handled bracket, the improvement comprising the roller having an outermost layer made of a rubbery organopolysiloxane elastomer having hardness not exceeding 40 as determined in accordance with Japanese Industrial Standard, K 6301, the surface of the layer being sticky, the stickiness of the surface of the layer is in the range of 4 to 30 as determined by J. Dow's rolling ball stick test, and said rubbery organopolysiloxane elastomer has a formulation comprising: (a) a diorganopolysiloxane with a viscosity in the range from 100 to 500,000 centistokes at 25° C. represented by the general formula ##STR4## where R is a monovalent hydrocarbon group, such as methyl and phenyl groups and p is a positive integer, and (b) an organosilane or an organopolysilozane having 2 to 4 hydrolyzable groups, such as alkoxy, acyloxy, aminoxy, amino, amido and oxime groups, per molecule in an account such that from 0.5 to 1.5 of the hydrolyzable groups are provided per hydroxy group in component (a).
Claim 6
Dependent Claim
191 words
In an improved Gramophone record cleaner of the roller type wherein at least one roller is rotatably supported by and between a pair of opposed, substantially parallel limbs on a handled bracket, the improvement comprising the roller having an outermost layer made of a rubbery organopolysiloxane elastomer having hardness not exceeding 40 as determined in accordance with Japanese Industrial Standard, K 6301, the surface of the layer being sticky, the stickiness of the surface of the layer is in the range of 4 to 30 as determined by J. Dow's rolling ball stick test, and said rubbery organopolysiloxane elastomer has a formulation comprising: (a) a diorganopolysiloxane with a viscosity in the range from 100 to 500,000 centistokes at 25° C. represented by the general formula ##STR4## where R is a monovalent hydrocarbon group, such as methyl and phenyl groups and p is a positive integer, and (b) an organosilane or an organopolysilozane having 2 to 4 hydrolyzable groups, such as alkoxy, acyloxy, aminoxy, amino, amido and oxime groups, per molecule in an account such that from 0.5 to 1.5 of the hydrolyzable groups are provided per hydroxy group in component (a).
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) | 1981-12-11 | 1982-06-12 | 1982-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-12-11 | 1986-06-12 | 1986-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-12-11 | 1990-06-12 | 1990-12-12 | $7700.00 | Window Closed / Lapsed |