US4563145A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alternately heatable and coolable moulding block
Assignee: US Philips Corp
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Filing: 1984-12-17
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Granted: 1986-01-07
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Expires: 2004-12-17
Abstract
Abstract An alternately heatable and coolable moulding block for manufacturing plate-shaped information carriers from thermoplastic material, which block is composed of a plate of an electrically insulating material which has a thin metal mould containing the information and in which plate a duct for a cooling liquid is provided and of an electrical conductor wound to form a flat induction coil. Between the mould and the insulating plate, there are provided a layer of a material of good thermal conductivity, which layer is in contact with the mould, and a layer of a ferromagnetic material.
Inventors
- 👤 Johannes P. de Meij
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 07:25
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/02; B29C33/04; B29C33/06; B29C35/00; B29C35/02; B29C35/08; B29C35/0805; B29C2035/0811; B29C35/16; B29C45/00; B29C45/17; B29C45/26; B29C45/2673; B29L; B29L2017/00; B29L2017/001; B29L2017/003; B29L2017/005; Y; Y10; Y10S; Y10S425/00; Y10S425/013; Y10S425/81
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
An alternately heatable and coolable moulding block for manufacturing a plate-shaped information carrier from thermoplastic material, the block comprising a plate of an electrically insulating material which carries a metal mould containing the information and in which plate a duct for a cooling liquid is provided, and an electrical conductor wound to form a flat induction coil, charactrerized in that between the mould and the insulating plate there are provided a layer of a material of good thermal conductivity, which layer is in contact with the mould, and a layer of an electrically conductive ferromagnetic material.
Claim 2
Dependent Claim
96 words
An alternately heatable and coolable moulding block for manufacturing a plate-shaped information carrier from thermoplastic material, the block comprising a plate of an electrically insulating material which carries a metal mould containing the information and in which plate a duct for a cooling liquid is provided, and an electrical conductor wound to form a flat induction coil, charactrerized in that between the mould and the insulating plate there are provided a layer of a material of good thermal conductivity, which layer is in contact with the mould, and a layer of an electrically conductive ferromagnetic material.
Claim 3
Dependent Claim
23 words
A moulding block as claimed in claim 1, characterized in that the electrical conductor is constituted by the wall of the cooling duct.
Claim 4
Dependent Claim
33 words
A moulding block as claimed in claim 1, characterized in that the layer of ferromagnetic material has a thickness of 100 μm and the thermally conductive layer has a thickness of 500 μm.
Claim 5
Dependent Claim
22 words
A moulding block as claimed in claim 1, 2 or 3, characterized in that the thermally conductive layer is made of copper.
References Cited (Backward Citations)
US3593376A
Cited
US3932097A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-06 | 1989-07-08 | 1990-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-06 | 1993-07-08 | 1994-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-06 | 1997-07-08 | 1998-01-07 | $7700.00 | Window Closed / Lapsed |