Patent US4371599A successfully refreshed from Google Patents.
US4371599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of printing forms and/or metallized images
Assignee: Hoechst AG
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Filing: 1976-12-14
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Granted: 1983-02-01
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Expires: 1996-12-14
Abstract
Abstract This invention relates to an improvement in the process for the preparation of printing forms and/or metallized images by electrostatic charging, exposing, and treating with a toner of a photoconductor layer applied to an electrically conductive support material, and removing the photoconductor layer in the non-image areas, the improvement which comprises effecting removal of the toner-free photoconductor layer by transferring it at a temperature in the range of about 50° to 250° C. to a receiving material which has a greater surface adhesion to the photoconductor layer than does the electrically conductive support material.
Inventors
- 👤 Erwin Lind
- 👤 Ilse Bader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 01:45
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/26; G03G13/32; G03G13/28; H; H05; H05K; H05K3/00; H05K3/02; H05K3/06; H05K3/061; H05K3/065
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
In the process for the preparation of printing forms and/or metalized images by electrostatic charging, exposing, and treating with a toner of a photoconductor layer applied to an electrically conductive support material, and removing the photoconductor layer in the non-image areas, said toner having no adhesive properties or only slight adhesive properties relative to a receiving material, the improvement which comprises effecting removal of the toner-free photoconductor layer only by transferring it, under pressure, in the absence of a solvent and at a temperature in the range of about 50° to 250° C. to a receiving material which has a greater surface adhesion to the photoconductor layer than does the electrically conductive support material.
Claim 2
Dependent Claim
114 words
In the process for the preparation of printing forms and/or metalized images by electrostatic charging, exposing, and treating with a toner of a photoconductor layer applied to an electrically conductive support material, and removing the photoconductor layer in the non-image areas, said toner having no adhesive properties or only slight adhesive properties relative to a receiving material, the improvement which comprises effecting removal of the toner-free photoconductor layer only by transferring it, under pressure, in the absence of a solvent and at a temperature in the range of about 50° to 250° C. to a receiving material which has a greater surface adhesion to the photoconductor layer than does the electrically conductive support material.
Claim 3
Dependent Claim
23 words
A process according to claim 1 including transferring the photoconductor layer at a temperature in the range of about 100° to 200° C.
Claim 4
Dependent Claim
19 words
A process according to claim 1 including transferring the photoconductor layer under a pressure of about 10 atmospheres gauge.
Claim 5
Dependent Claim
23 words
A process according to claim 1 including transferring the toner-free photoconductor layer from a mechanically surface-roughened aluminum foil to an anodized aluminum surface.
Claim 6
Dependent Claim
24 words
A process according to claim 1 including treating the latent image on the photoconductor layer with a liquid developer containing polytetrafluoroethylene as the toner.
Claim 7
Dependent Claim
15 words
A process according to claim 1 including etching the non-image areas of the support material.
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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) | 1986-01-31 | 1986-08-02 | 1987-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-01-31 | 1990-08-02 | 1991-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-01-31 | 1994-08-02 | 1995-02-01 | $7700.00 | Window Closed / Lapsed |