US4017581A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing relief printing masters and molds
Assignee: Xerox Corp
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Filing: 1975-03-25
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Granted: 1977-04-12
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Expires: 1995-03-25
Abstract
Abstract A process for preparing a mold for relief printing masters, said mold having an adhesive silicone surface, is provided comprising depositing a particulate material in image configuration on a suitable substrate, contacting said substrate with a second member comprising a substrate with an adhesive coating of a silicone gum curable to an adhesive elastomeric condition such that the adhesive gum is in contact with the image material, separating the members whereby the silicone layer splits in the nonimaged areas and is prevented from splitting by the transfer of the particulate image material to the second member in the image areas, and curing the silicone gum on the first member to an adhesive elastomeric condition to provide a mold for printing masters. The process for preparing the printing master comprises the additional steps of filling the submerged portions of said mold with a liquid but hardenable material suitable for master imaging, contacting said liquid with a suitable master substrate, hardening the liquid material and removing the resultant printing master.
Inventors
- 👤 Alan B. Amidon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 00:28
CPC Classifications
G; G03; G03G; G03G13/00; G03G13/26; G03G13/32; B; B41; B41C; B41C3/00; B41C3/06; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1059; Y10T156/1089; Y10T156/109
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
140 words
A method for preparing an abhesive mold for making printing masters comprising providing a suitable first substrate, depositing a particulate material in image configuration on said first substrate, coating a second substrate with a tacky adhesive silicone gum curable to an abhesive elastomeric condition, contacting said substrates such that the adhesive is in contact with the image bearing substrate in the nonimaged areas and is in contact with the particulate material in the imaged areas, separating said substrates whereby the silicone splits in the nonimaged areas and is prevented from splitting by the transfer of the particulate image material in the imaged areas, and whereby the image material is transferred from the first substrate to the second substrate and curing the silicone gum remaining on the first substrate to an elastomeric condition to provide a mold for relief printing masters.
Claim 2
Independent Claim
140 words
A method for preparing an abhesive mold for making printing masters comprising providing a suitable first substrate, depositing a particulate material in image configuration on said first substrate, coating a second substrate with a tacky adhesive silicone gum curable to an abhesive elastomeric condition, contacting said substrates such that the adhesive is in contact with the image bearing substrate in the nonimaged areas and is in contact with the particulate material in the imaged areas, separating said substrates whereby the silicone splits in the nonimaged areas and is prevented from splitting by the transfer of the particulate image material in the imaged areas, and whereby the image material is transferred from the first substrate to the second substrate and curing the silicone gum remaining on the first substrate to an elastomeric condition to provide a mold for relief printing masters.
Claim 3
Dependent Claim
21 words
The method of claim 1 wherein the adhesive gum is applied to a thickness between about 1 and about 50 microns.
Claim 4
Dependent Claim
18 words
The method of claim 1 wherein the adhesive gum is a blend of polydimethylsiloxane and polystyrene or poly(α-methylstyrene).
Claim 5
Dependent Claim
16 words
The method of claim 1 wherein the adhesive gum is a blend of polydimethylsiloxane and poly(α-methylstyrene).
Claim 6
Independent Claim
191 words
A method for preparing a printing master comprising: a. providing a suitable first substrate, b. depositing a particulate material in image configuration on said first substrate, c. providing a second substrate, d. coating said second substrate with a tacky adhesive silicone gum curable to an abhesive elastomeric condition, e. contacting said coated substrates such that the adhesive is in contact with the image bearing substrate in the nonimaged areas and is in contact with the particulate material in the imaged areas, f. separating said substrates whereby the silicone splits in the nonimaged areas and is prevented from splitting by the transfer of the particulate image material in the imaged areas, and whereby the image material is transferred from the first substrate to the second substrate, g. curing the silicone gum remaining on the first substrate to an elastomeric condition to provide a mold for relief printing masters, h. filling the resultant submerged portions of said mold with a liquid but hardenable material suitable for forming a master image, i. affixing a suitable master substrate to said liquid material, j. hardening the liquid material and removing the resultant replica from the mold.
Claim 7
Independent Claim
191 words
A method for preparing a printing master comprising: a. providing a suitable first substrate, b. depositing a particulate material in image configuration on said first substrate, c. providing a second substrate, d. coating said second substrate with a tacky adhesive silicone gum curable to an abhesive elastomeric condition, e. contacting said coated substrates such that the adhesive is in contact with the image bearing substrate in the nonimaged areas and is in contact with the particulate material in the imaged areas, f. separating said substrates whereby the silicone splits in the nonimaged areas and is prevented from splitting by the transfer of the particulate image material in the imaged areas, and whereby the image material is transferred from the first substrate to the second substrate, g. curing the silicone gum remaining on the first substrate to an elastomeric condition to provide a mold for relief printing masters, h. filling the resultant submerged portions of said mold with a liquid but hardenable material suitable for forming a master image, i. affixing a suitable master substrate to said liquid material, j. hardening the liquid material and removing the resultant replica from the mold.
Claim 8
Dependent Claim
12 words
The method of claim 5 wherein the liquid material is a polyurethane.
Claim 9
Dependent Claim
26 words
The method of claim 5 wherein the valleys of the mold are coated with a release fluid prior to filling with the liquid but hardenable material.
Claim 10
Dependent Claim
21 words
The method of claim 5 wherein the adhesive gum is applied to a thickness between about 1 and about 50 microns.
Claim 11
Dependent Claim
18 words
The method of claim 5 wherein the adhesive gum is a blend of polydimethylsiloxane and polystyrene or poly(α-methylstyrene).
Claim 12
Dependent Claim
16 words
The method of claim 5 wherein the adhesive gum is a blend of polydimethylsiloxane and poly(α-methylstyrene).
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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) | 1980-04-11 | 1980-10-11 | 1981-04-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-04-11 | 1984-10-11 | 1985-04-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-04-11 | 1988-10-11 | 1989-04-12 | $7700.00 | Window Closed / Lapsed |