US5383834A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll stamper for forming a base for information recording medium
Assignee: Canon Inc
•
Filing: 1992-06-12
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Granted: 1995-01-24
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Expires: 2012-06-12
Abstract
Abstract A roll stamper used in a process of continuously forming a uniform sheet of a resin from which information recording medium bases are obtained. This roll stamper has a stamper member having in its surface a pattern corresponding to a pre-format pattern of an information recording medium, fixing members fixed on opposite end portions of a reverse surface of the stamper member so as to be integral with the stamper member, and a specular roll base having an engagement groove formed in its circumferential surface parallel to its axis. The stamper member is fixed on the specular roll base by fitting the fixing members in the engagement groove. A recess formed in a circumferential surface of the roll stamper as a gap between the fixing members is filled with a filler so that the roll stamper circumferential surface is substantially smooth. Side surfaces of the fixing members and/or the engagement groove are shaped as to suitably retain the filler.
Inventors
- 👤 Osamu Kanome
- 👤 Hirofumi Kamitakahara
- 👤 Hitoshi Yoshino
- 👤 Tetsuya Sato
- 👤 Hisanori Hayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:18
CPC Classifications
B; B21; B21H; B21H8/00; B21H8/005; B29; B29C; B29C43/00; B29C43/22; B29C43/222; B29C43/32; B29C43/44; B29C43/46
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
186 words
A roll stamper for forming an information recording medium base sheet, comprising; a stamper member having a pattern corresponding to a pre-format pattern of an information recording medium in a surface of said stamper member; fixing members fixed on opposite end portions of a reverse surface of said stamper member so as to be integral with said stamper member; a specular roll base having a plurality of engagement grooves formed in a circumferential surface parallel to its axis in which grooves said fixing member can be respectively fitted; and said stamper member being fixed on said specular roll base by respectively fitting said fixing members in said engagement grooves, said stamper member being placed along the circumferential surface of said specular roll base; wherein a recess in a circumferential surface of the roll stamper including a gap between said fixing members and said engagement grooves is filled with a filler so that the roll stamper circumferential surface is substantially smooth, and said filler is formed of a material having a thermal expansion coefficient larger than the thermal expansion coefficient of the material of said roll base.
Claim 2
Dependent Claim
186 words
A roll stamper for forming an information recording medium base sheet, comprising; a stamper member having a pattern corresponding to a pre-format pattern of an information recording medium in a surface of said stamper member; fixing members fixed on opposite end portions of a reverse surface of said stamper member so as to be integral with said stamper member; a specular roll base having a plurality of engagement grooves formed in a circumferential surface parallel to its axis in which grooves said fixing member can be respectively fitted; and said stamper member being fixed on said specular roll base by respectively fitting said fixing members in said engagement grooves, said stamper member being placed along the circumferential surface of said specular roll base; wherein a recess in a circumferential surface of the roll stamper including a gap between said fixing members and said engagement grooves is filled with a filler so that the roll stamper circumferential surface is substantially smooth, and said filler is formed of a material having a thermal expansion coefficient larger than the thermal expansion coefficient of the material of said roll base.
Claim 3
Dependent Claim
30 words
A roll stamper according to claim 1, wherein a side surface of at least one of said fixing members is formed so as to be capable of retaining said filler.
Claim 4
Dependent Claim
33 words
A roll stamper according to claim 1, wherein a side surface of at least one of said fixing members is formed so as to have a surface roughness of 10 μm or greater.
Claim 5
Dependent Claim
29 words
A roll stamper according to claim 1, wherein a recess capable of retaining said filler is formed in a side surface of at least one of said fixing members.
Claim 6
Dependent Claim
27 words
A roll stamper according to claim 1, wherein said filler is formed of a material having a thermal expansion coefficient of 1×10 -3 /° C. or smaller.
Claim 7
Dependent Claim
15 words
A roll stamper according to claim 1, wherein said filler comprises a heat resistant resin.
Claim 8
Dependent Claim
14 words
A roll stamper according to claim 6, wherein said filler comprises a silicone resin.
Claim 9
Dependent Claim
30 words
A roll stamper according to claim 7, wherein said filler comprises a set material of a silicone resin having a viscosity of 100 to 100,000 cps in an unset state.
Claim 10
Dependent Claim
30 words
A roll stamper according to claim 8, wherein said filler comprises a set material of a silicone resin having a viscosity of 1,000 to 10,000 cps in an unset state.
Claim 11
Dependent Claim
14 words
A roll stamper according to claim 6, wherein said filler comprises an epoxy resin.
Claim 12
Dependent Claim
31 words
A roll stamper according to claim 10, wherein said filler comprises a set material of an epoxy resin precursor having a viscosity of 100 to 100,000 cps in an unset state.
Claim 13
Dependent Claim
31 words
A roll stamper according to claim 11, wherein said filler comprises a set material of an epoxy resin precursor having a viscosity of 1,000 to 10,000 cps in an unset state.
Claim 14
Dependent Claim
180 words
A roll stamper for forming an information recording medium base sheet, comprising; a stamper member having a pattern corresponding to a pre-format pattern of an information recording medium in a surface of said stamper member; fixing members fixed on opposite end portions of a reverse surface of said stamper member so as to be integral with said stamper member; a specular roll base having a plurality of engagement grooves formed in a circumferential surface parallel to its axis in which grooves said fixing member can be respectively fitted; and said stamper member being fixed on said specular roll base by respectively fitting said fixing members in said engagement grooves, said stamper member being placed along the circumferential surface of said specular roll base; wherein a recess in a circumferential surface of the roll stamper including a gap between said fixing members and said engagement grooves is filled with a filler so that the roll stamper circumferential surface is substantially smooth and said filler is formed of a material having a thermal expansion coefficient of 1×10 -3 /° C. or smaller.
Claim 15
Dependent Claim
180 words
A roll stamper for forming an information recording medium base sheet, comprising; a stamper member having a pattern corresponding to a pre-format pattern of an information recording medium in a surface of said stamper member; fixing members fixed on opposite end portions of a reverse surface of said stamper member so as to be integral with said stamper member; a specular roll base having a plurality of engagement grooves formed in a circumferential surface parallel to its axis in which grooves said fixing member can be respectively fitted; and said stamper member being fixed on said specular roll base by respectively fitting said fixing members in said engagement grooves, said stamper member being placed along the circumferential surface of said specular roll base; wherein a recess in a circumferential surface of the roll stamper including a gap between said fixing members and said engagement grooves is filled with a filler so that the roll stamper circumferential surface is substantially smooth and said filler is formed of a material having a thermal expansion coefficient of 1×10 -3 /° C. or smaller.
Claim 16
Dependent Claim
30 words
A roll stamper according to claim 13, wherein a side surface of at least one of said fixing members is formed so as to be capable of retaining said filler.
Claim 17
Dependent Claim
33 words
A roll stamper according to claim 13, wherein a side surface of at least one of said fixing members is formed so as to have a surface roughness of 10 μm or greater.
Claim 18
Dependent Claim
29 words
A roll stamper according to claim 13, wherein a recess capable of retaining said filler is formed in a side surface of at least one of said fixing members.
Claim 19
Dependent Claim
193 words
A roll stamper for forming an information recording medium base sheet, comprising; a stamper member having a pattern corresponding to a pre-format pattern of an information recording medium in a surface of said stamper member; fixing members fixed on opposite end portions of a reverse surface of said stamper member so as to be integral with said stamper member; a specular roll base having a plurality of engagement grooves formed in a circumferential surface parallel to its axis in which grooves said fixing member can be respectively fitted; and said stamper member being fixed on said specular roll base by respectively fitting said fixing members in said engagement grooves, said stamper member being placed along the circumferential surface of said specular roll base; wherein a recess in a circumferential surface of the roll stamper including a gap between said fixing members and said engagement grooves is filled with a filler so that the roll stamper circumferential surface is substantially smooth, and wherein said filler comprises a heat resistant resin, said heat resistant resin being a set material of a silicone resin having a viscosity of 100 to 100,000 cps in an unset state.
Claim 20
Dependent Claim
193 words
A roll stamper for forming an information recording medium base sheet, comprising; a stamper member having a pattern corresponding to a pre-format pattern of an information recording medium in a surface of said stamper member; fixing members fixed on opposite end portions of a reverse surface of said stamper member so as to be integral with said stamper member; a specular roll base having a plurality of engagement grooves formed in a circumferential surface parallel to its axis in which grooves said fixing member can be respectively fitted; and said stamper member being fixed on said specular roll base by respectively fitting said fixing members in said engagement grooves, said stamper member being placed along the circumferential surface of said specular roll base; wherein a recess in a circumferential surface of the roll stamper including a gap between said fixing members and said engagement grooves is filled with a filler so that the roll stamper circumferential surface is substantially smooth, and wherein said filler comprises a heat resistant resin, said heat resistant resin being a set material of a silicone resin having a viscosity of 100 to 100,000 cps in an unset state.
Claim 21
Dependent Claim
30 words
A roll stamper according to claim 17, wherein a side surface of at least one of said fixing members is formed so as to be capable of retaining said filler.
Claim 22
Dependent Claim
33 words
A roll stamper according to claim 17, wherein a side surface of at least one of said fixing members is formed so as to have a surface roughness of 10 μm or greater.
Claim 23
Dependent Claim
29 words
A roll stamper according to claim 17, wherein a recess capable of retaining said filler is formed in a side surface of at least one of said fixing members.
Claim 24
Dependent Claim
193 words
A roll stamper for forming an information recording medium base sheet, comprising; a stamper member having a pattern corresponding to a pre-format pattern of an information recording medium in a surface of said stamper member; fixing members fixed on opposite end portions of a reverse surface of said stamper member so as to be integral with said stamper member; a specular roll base having a plurality of engagement grooves formed in a circumferential surface parallel to its axis in which grooves said fixing member can be respectively fitted; and said stamper member being fixed on said specular roll base by respectively fitting said fixing members in said engagement grooves, said stamper member being placed along the circumferential surface of said specular roll base; wherein a recess in a circumferential surface of the roll stamper including a gap between said fixing members and said engagement grooves is filled with a filler so that the roll stamper circumferential surface is substantially smooth, and wherein said filler comprises a heat resistant resin, said heat resistant resin being a set material of a silicone resin having a viscosity of 1,000 to 10,000 cps in an unset state.
Claim 25
Dependent Claim
193 words
A roll stamper for forming an information recording medium base sheet, comprising; a stamper member having a pattern corresponding to a pre-format pattern of an information recording medium in a surface of said stamper member; fixing members fixed on opposite end portions of a reverse surface of said stamper member so as to be integral with said stamper member; a specular roll base having a plurality of engagement grooves formed in a circumferential surface parallel to its axis in which grooves said fixing member can be respectively fitted; and said stamper member being fixed on said specular roll base by respectively fitting said fixing members in said engagement grooves, said stamper member being placed along the circumferential surface of said specular roll base; wherein a recess in a circumferential surface of the roll stamper including a gap between said fixing members and said engagement grooves is filled with a filler so that the roll stamper circumferential surface is substantially smooth, and wherein said filler comprises a heat resistant resin, said heat resistant resin being a set material of a silicone resin having a viscosity of 1,000 to 10,000 cps in an unset state.
Claim 26
Dependent Claim
30 words
A roll stamper according to claim 21, wherein a side surface of at least one of said fixing members is formed so as to be capable of retaining said filler.
Claim 27
Dependent Claim
33 words
A roll stamper according to claim 21, wherein a side surface of at least one of said fixing members is formed so as to have a surface roughness of 10 μm or greater.
Claim 28
Dependent Claim
29 words
A roll stamper according to claim 21, wherein a recess capable of retaining said filler is formed in a side surface of at least one of said fixing members.
Claim 29
Dependent Claim
194 words
A roll stamper for forming an information recording medium base sheet, comprising; a stamper member having a pattern corresponding to a pre-format pattern of an information recording medium in a surface of said stamper member; fixing members fixed on opposite end portions of a reverse surface of said stamper member so as to be integral with said stamper member; a specular roll base having a plurality of engagement grooves formed in a circumferential surface parallel to its axis in which grooves said fixing member can be respectively fitted; and said stamper member being fixed on said specular roll base by respectively fitting said fixing members in said engagement grooves, said stamper member being placed along the circumferential surface of said specular roll base; wherein a recess in a circumferential surface of the roll stamper including a gap between said fixing members and said engagement grooves is filled with a filler so that the roll stamper circumferential surface is substantially smooth, and wherein said filler comprises a heat resistant resin, said heat resistant resin comprises a set material of an epoxy resin precursor having a viscosity of 100 to 100,000 cps in an unset state.
Claim 30
Dependent Claim
194 words
A roll stamper for forming an information recording medium base sheet, comprising; a stamper member having a pattern corresponding to a pre-format pattern of an information recording medium in a surface of said stamper member; fixing members fixed on opposite end portions of a reverse surface of said stamper member so as to be integral with said stamper member; a specular roll base having a plurality of engagement grooves formed in a circumferential surface parallel to its axis in which grooves said fixing member can be respectively fitted; and said stamper member being fixed on said specular roll base by respectively fitting said fixing members in said engagement grooves, said stamper member being placed along the circumferential surface of said specular roll base; wherein a recess in a circumferential surface of the roll stamper including a gap between said fixing members and said engagement grooves is filled with a filler so that the roll stamper circumferential surface is substantially smooth, and wherein said filler comprises a heat resistant resin, said heat resistant resin comprises a set material of an epoxy resin precursor having a viscosity of 100 to 100,000 cps in an unset state.
Claim 31
Dependent Claim
30 words
A roll stamper according to claim 25, wherein a side surface of at least one of said fixing members is formed so as to be capable of retaining said filler.
Claim 32
Dependent Claim
33 words
A roll stamper according to claim 25, wherein a side surface of at least one of said fixing members is formed so as to have a surface roughness of 10 μm or greater.
Claim 33
Dependent Claim
29 words
A roll stamper according to claim 25, wherein a recess capable of retaining said filler is formed in a side surface of at least one of said fixing members.
Claim 34
Dependent Claim
194 words
A roll stamper for forming an information recording medium base sheet, comprising; a stamper member having a pattern corresponding to a pre-format pattern of an information recording medium in a surface of said stamper member; fixing members fixed on opposite end portions of a reverse surface of said stamper member so as to be integral with said stamper member; a specular roll base having a plurality of engagement grooves formed in a circumferential surface parallel to its axis in which grooves said fixing member can be respectively fitted; and said stamper member being fixed on said specular roll base by respectively fitting said fixing members in said engagement grooves, said stamper member being placed along the circumferential surface of said specular roll base; wherein a recess in a circumferential surface of the roll stamper including a gap between said fixing members and said engagement grooves is filled with a filler so that the roll stamper circumferential surface is substantially smooth, and wherein said filler comprises a heat resistant resin, said heat resistant resin comprises a set material for an epoxy resin precursor having a viscosity of 100 to 10,000 cps in an unset state.
Claim 35
Dependent Claim
194 words
A roll stamper for forming an information recording medium base sheet, comprising; a stamper member having a pattern corresponding to a pre-format pattern of an information recording medium in a surface of said stamper member; fixing members fixed on opposite end portions of a reverse surface of said stamper member so as to be integral with said stamper member; a specular roll base having a plurality of engagement grooves formed in a circumferential surface parallel to its axis in which grooves said fixing member can be respectively fitted; and said stamper member being fixed on said specular roll base by respectively fitting said fixing members in said engagement grooves, said stamper member being placed along the circumferential surface of said specular roll base; wherein a recess in a circumferential surface of the roll stamper including a gap between said fixing members and said engagement grooves is filled with a filler so that the roll stamper circumferential surface is substantially smooth, and wherein said filler comprises a heat resistant resin, said heat resistant resin comprises a set material for an epoxy resin precursor having a viscosity of 100 to 10,000 cps in an unset state.
Claim 36
Dependent Claim
30 words
A roll stamper according to claim 29, wherein a side surface of at least one of said fixing members is formed so as to be capable of retaining said filler.
Claim 37
Dependent Claim
33 words
A roll stamper according to claim 29, wherein a side surface of at least one of said fixing members is formed so as to have a surface roughness of 10 μm or greater.
Claim 38
Dependent Claim
29 words
A roll stamper according to claim 29, wherein a recess capable of retaining said filler is formed in a side surface of at least one of said fixing members.
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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) | 1998-01-23 | 1998-07-25 | 1999-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-01-23 | 2002-07-25 | 2003-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-01-23 | 2006-07-25 | 2007-01-24 | $7700.00 | Window Closed / Lapsed |