US4371599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the preparation of printing forms and/or metallized images
Assignee: Hoechst AG
•
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 01:37
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.
References Cited (Backward Citations)
US2681473A
Cited
US2949848A
Cited
US3088402A
Cited
US3650797A
Cited
US3305359A
Cited
US3446616A
Cited
US3615385A
Cited
US3664834A
Cited
US3682677A
Cited
US3676350A
Cited
US3761413A
Cited
US3970453A
Cited
US4024242A
Cited
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 |