US5284435A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for manufacturing a disc-shaped information carrier
Assignee: US Philips Corp
•
Filing: 1992-11-23
•
Granted: 1994-02-08
•
Expires: 2012-11-23
Abstract
Abstract An apparatus for manufacturing an object having a relief structure on a surface thereof by pressing a first element provided with a negative of the relief structure against a second element to form the relief structure in the surface of the second element. The apparatus includes the first element and two pressure members having pressure surfaces facing each other and opposing both of the elements, the pressure members being moveable relative to each other in a direction transverse to the pressure surfaces. The apparatus also has a pressure body secured to the pressure surface of at least one of the pressure member, having a contact surface for cooperation with one of the elements and being formed of a material whose quotient of its Poissons' ratio to its modules of elasticity differs less from the corresponding quotient of the material of the element cooperating with said contact surface in operation than from the corresponding quotient of the material of the pressure member to which the pressure body is secured.
Inventors
- 👤 Pieter W. J. M. Nuij
- 👤 Peter P. W. L. Van den Bekerom
- 👤 Evert-Jan Mulder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 15:43
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/24; G11B7/26; G11B7/263; B; B29; B29C; B29C59/00; B29C59/02; B29D; B29D17/00; B29D17/005; Y; Y10; Y10S; Y10S425/00; Y10S425/81
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
168 words
In an apparatus for manufacturing an object having a surface structure by pressing a first element which has a relief on a surface against a second element to provide the second element with a microstructure by cold deformation said apparatus comprising said first element and two pressure members having pressure surfaces facing each other and opposing said elements, the pressure members being movable relative to each other in directions of movement transverse to the pressure surfaces, the improvement wherein a pressure body is secured to the pressure surface of at least one of the pressure members, said pressure body having a contact surface for cooperation with one of the elements and said pressure body being made of a material whose quotient of its Poisson's ratio to its modulus of elasticity differs less from the corresponding quotient of the material of the element cooperating with said contact surface in operation than from the corresponding quotient of the material of the pressure member to which the pressure body is secured.
Claim 2
Dependent Claim
168 words
In an apparatus for manufacturing an object having a surface structure by pressing a first element which has a relief on a surface against a second element to provide the second element with a microstructure by cold deformation said apparatus comprising said first element and two pressure members having pressure surfaces facing each other and opposing said elements, the pressure members being movable relative to each other in directions of movement transverse to the pressure surfaces, the improvement wherein a pressure body is secured to the pressure surface of at least one of the pressure members, said pressure body having a contact surface for cooperation with one of the elements and said pressure body being made of a material whose quotient of its Poisson's ratio to its modulus of elasticity differs less from the corresponding quotient of the material of the element cooperating with said contact surface in operation than from the corresponding quotient of the material of the pressure member to which the pressure body is secured.
Claim 3
Dependent Claim
21 words
An apparatus as claimed in claim 1, wherein, in addition, a similar pressure body is secured to the other pressure surface.
Claim 4
Dependent Claim
38 words
An apparatus as claimed in claim 1 wherein the quotient of the material of the pressure body is at least substantially equal to the quotient of the material of the element cooperating with the contact surface in operation.
Claim 5
Dependent Claim
16 words
An apparatus as claimed in claim 1, wherein the material of the pressure body is plastic.
Claim 6
Dependent Claim
13 words
An apparatus as claimed in claim 4, wherein the plastic is a polycarbonate.
Claim 7
Dependent Claim
17 words
An apparatus as claimed in claim 4 or 5, wherein the plastic is transparent to UV radiation.
Claim 8
Dependent Claim
19 words
An apparatus as claimed in claim 1, wherein the contact surface of the pressure body is conical or convex.
Claim 9
Dependent Claim
40 words
An apparatus as claimed in claim 7, wherein the contact surface of the pressure body is conical and is disposed at a maximum angle of two milliradians relative to a plane which is oriented transversely to the directions of movement.
Claim 10
Dependent Claim
13 words
An apparatus as claimed in claim 8, wherein said angle is 1 milliradian.
Claim 11
Dependent Claim
31 words
An apparatus as claimed in claim 7, wherein the pressure body has a conical or convex contact surface facing the pressure surface of the pressure member to which it is secured.
Claim 12
Dependent Claim
29 words
An apparatus as claimed in claim 1, wherein the pressure body is cylindrical and is secured to a pressure member in a manner so as to allow radial extension.
Claim 13
Dependent Claim
32 words
An apparatus as claimed in claim 11, wherein the pressure surface of the pressure member is provided with a tetrafluoroethylene polymer layer which extends between the pressure member and the pressure body.
References Cited (Backward Citations)
US4312823A
Cited
US4315723A
Cited
US4302175A
Cited
US4783041A
Cited
US4954841A
Cited
US5174937A
Cited
US5180595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-02-07 | 1997-08-09 | 1998-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-07 | 2001-08-09 | 2002-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-07 | 2005-08-09 | 2006-02-08 | $7700.00 | Window Closed / Lapsed |