EP0352709A2
Expired / Lapsed
EP
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Method and apparatus for forming curved surface
Assignee: NTT Inc
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Filing: 1989-07-24
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Granted: —
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Expires: 2009-07-24
Abstract
Abstract In a method and apparatus for forming a curved surface, a polishing plate consisting of a film-like elastic member is supported at two positions, i.e., central and peripheral portions thereof, and is rotated while two cylinders having different heights and diameters are urged upward against portions between the central and peripheral portions of the polishing plate, and an object to be processed is urged downward against a surface formed between the two cylinders while the object is rotated, thereby forming a curved surface.
Inventors
- 👤 Junji Watanabe
- 👤 Tadao Saitoh
- 👤 Kazuo Matsunaga
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 09:10
CPC Classifications
B; B24; B24B; B24B19/00; B24B19/22; B24B19/226; Y; Y10; Y10S; Y10S359/00; Y10S359/90
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
81 words
A method of forming a curved surface, wherein a polishing plate consisting of a film-like elastic member is supported at two positions, i.e., central and peripheral portions thereof, and is rotated while two cylinders having different heights and diameters are urged upward against portions between the central and peripheral portions of said polishing plate, and an object to be processed is urged downward against a surface formed between said two cylinders while the object is rotated, thereby forming a curved surface.
Claim 2
Independent Claim
81 words
A method of forming a curved surface, wherein a polishing plate consisting of a film-like elastic member is supported at two positions, i.e., central and peripheral portions thereof, and is rotated while two cylinders having different heights and diameters are urged upward against portions between the central and peripheral portions of said polishing plate, and an object to be processed is urged downward against a surface formed between said two cylinders while the object is rotated, thereby forming a curved surface.
Claim 3
Dependent Claim
17 words
A method according to claim 1, wherein said surface between said two cylinders is an inclined surface
Claim 4
Dependent Claim
24 words
A method according to claim 1, wherein the peripheral portion of said polishing plate is fixed, and the central portion thereof is spring-biased downward.
Claim 5
Dependent Claim
68 words
A method according to claim 1, wherein the peripheral portion of said polishing plate is fixed on a rotary base, and the central portion of said polishing plate is fixed to a shaft portion extending through a hole formed in a central portion of said rotary base, said shaft portion being spring-biased against said rotary base, and said outer and inner cylinders are arranged on said rotary base.
Claim 6
Dependent Claim
31 words
A method according to claim 1, wherein said polishing plate consists of a cellulose resin containing a fiber element as a major component, the fiber element containing cellulose as a matrix.
Claim 7
Dependent Claim
36 words
A method according to claim 5, wherein the cellulose resin is obtained by blending 10 to 50 wt% of camphor and 20 to 60 wt% of ethanol with 10 to 50 wt% of a fiber element.
Claim 8
Dependent Claim
18 words
A method according to claim 6, wherein the fiber element contains a hydroxyl group as a functional group.
Claim 9
Dependent Claim
35 words
A method according to claim 1, wherein said polishing plate consists of a composite resin containing a cellulose resin containing a fiber element as a major component, the fiber element containing cellulose as a matrix.
Claim 10
Dependent Claim
43 words
A method according to claim 8, wherein the composite resin is obtained by blending 20 wt% of an element selected from the group consisting of a nylon resin, a foamed urethane resin, a vinyl chloride resin, and a fluoroplastic with a cellulose resin.
Claim 11
Dependent Claim
36 words
A method according to claim 1, wherein while the object is urged against said polishing plate, an abrasive medium containing particles (abrasive grains) is fed to a contact surface between the object and said polishing plate.
Claim 12
Dependent Claim
17 words
A method according to claim 1, wherein the object is alternately rotated in forward and reverse directions.
Claim 13
Dependent Claim
24 words
A method according to claim 11, wherein a reverse position of forward rotation and reverse rotation is different from an immediately preceding reverse position.
Claim 14
Dependent Claim
28 words
A method according to claim 11, wherein the reverse position is shifted by setting rotational angles of forward rotation and reverse rotation to be different from each other.
Claim 15
Dependent Claim
24 words
A method according to claim 13, wherein the number of cycles of forward rotation is set to be equal to that of reverse rotation.
Claim 16
Independent Claim
80 words
An apparatus for forming a curved surface, comprising: a polishing plate consisting of a film-like elastic member; a rotary plate for supporting a peripheral portion of said polishing plate; two cylinders arranged on said rotary plate and having different heights and diameters; means for spring-biasing a central portion of said polishing plate downward; and rotating means for rotating an object to be processed and urging the object against said polishing plate, thereby a curved surface is formed on the object.
Claim 17
Independent Claim
80 words
An apparatus for forming a curved surface, comprising: a polishing plate consisting of a film-like elastic member; a rotary plate for supporting a peripheral portion of said polishing plate; two cylinders arranged on said rotary plate and having different heights and diameters; means for spring-biasing a central portion of said polishing plate downward; and rotating means for rotating an object to be processed and urging the object against said polishing plate, thereby a curved surface is formed on the object.
Claim 18
Dependent Claim
17 words
An apparatus according to claim 15, wherein said surface between said two cylinders is an inclined surface.
Claim 19
Dependent Claim
72 words
An apparatus according to claim 15, wherein said rotary plate comprises a shaft portion having a through hole formed in a central portion thereof, and said means for spring-biasing comprises a tension applying shaft extending from the central portion of said polishing plate to a lower position through the through hole of said rotary plate, and a spring for biasing said tension applying shaft against said shaft portion of said rotary plate.
Claim 20
Dependent Claim
25 words
An apparatus according to claim 15, wherein at least one of said two cylinders is positioned by a positioning member formed on said rotary plate.
Claim 21
Dependent Claim
29 words
An apparatus according to claim 15, further comprising means for feeding an abrasive medium containing particles (abrasive grains) to a contact surface between the object and said polishing plate.
Claim 22
Dependent Claim
21 words
An apparatus according to claim 15, wherein said rotating means comprises means for rotating the object in forward and reverse directions.
Claim 23
Dependent Claim
31 words
An apparatus according to claim 15, wherein said polishing plate consists of a cellulose resin containing a fiber element as a major component, the fiber element containing cellulose as a matrix.
Claim 24
Dependent Claim
36 words
An apparatus according to claim 15, wherein the cellulose resin is obtained by blending 10 to 50 wt% of camphor and 20 to 60 wt% of ethanol with 10 to 50 wt% of a fiber element.
Claim 25
Dependent Claim
18 words
An apparatus according to claim 22, wherein the fiber element contains a hydroxyl group as a functional group.
Claim 26
Dependent Claim
35 words
An apparatus according to claim 15, wherein said polishing plate consists of a composite resin containing a cellulose resin containing a fiber element as a major component, the fiber element containing cellulose as a matrix.
Claim 27
Dependent Claim
43 words
An apparatus according to claim 24, wherein the composite resin is obtained by blending 20 wt% of an element selected from the group consisting of a nylon resin, a foamed urethane resin, a vinyl chloride resin, and a fluoroplastic with a cellulose resin.
Claim 28
Dependent Claim
20 words
An apparatus according to claim 15, wherein said rotating means alternately repeats forward rotation and reverse rotation of the object.
Claim 29
Dependent Claim
26 words
An apparatus according to claim 26, wherein said rotating means changes a reverse position of forward rotation and reverse rotation from an immediately preceding reverse position.
Claim 30
Dependent Claim
27 words
An apparatus according to claim 26, wherein said rotating means shifts the reverse position by setting rotational angles of forward rotation and reverse rotation of the object.
Claim 31
Dependent Claim
26 words
An apparatus according to claim 28, wherein said rotating means sets the number of cycles of forward rotation to be equal to that of reverse rotation.
Claim 32
Dependent Claim
89 words
An apparatus according to claim 15, wherein said rotary plate comprises a first rotary base for supporting said outer and inner cylinders, and a second rotary base for supporting the peripheral portion of said polishing plate, and said means for biasing comprises a tension applying shaft extending from the central portion to a lower position through a through hole formed in said first and second rotary bases, and a spring, arranged between said first and second rotary bases, for biasing said tension applying shaft against said first rotary base.
Claim 33
Dependent Claim
29 words
An apparatus according to claim 15, wherein said inner and outer cylinders comprise means for adjusting heights of said inner and outer cylinders with respect to said rotary plate.
References Cited (Backward Citations)
No citation records indexed.
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