US4767694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a blanket with reserved spaces utilizing photocopying procedure
Assignee: MAN-ROLAND DRUCKMASCHINEN AKTIENGESELLSCHAFT CHRISTIAN-PLESSE-STR 6-30 6050 OFFENBACH/MAIN WEST GERMANY
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Filing: 1986-12-31
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Granted: 1988-08-30
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Expires: 2006-12-31
Abstract
Abstract The invention relates to a method of preparing a varnish blanket. Instead of a proof being used for pre-location of required varnish-free zones on a blanket for blanked-out in-line varnishing in rotary presses, the zones required not to be varnished are transferred by means of a reference copy, and after physico-chemical pretreatment adapted to the surface properties of the blanket, to a blanket stuck to a support plate. In addition to polyvinyl alcohol copying layers or coatings sensitized by bichromate, wipe-on copying layers sensitized by diazo salts are suitable, a positive or negative original being copied by direct contact in known manner onto a blanket thus pretreated. The zones required not to be varnished can therefore be preformed by cutting out the top layer of the blanket.
Inventors
- 👤 Johannes M. Schubert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:10
CPC Classifications
B; B41; B41N; B41N10/00; B41N10/02; B41M; B41M7/00; B41M7/0045; Y; Y10; Y10S; Y10S430/00; Y10S430/152
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
157 words
A method for preparing a blanket for in-line varnishing with dispersion varnishes on an aqueous base or in association with UV-varnish-resistant blankets for the application of low-viscosity UV-varnish in rotary offset presses, comprising: (a) pretreating a blanket suitable for offset printing to increase the adherence of a photo-sensitive copying layer to said blanket, (b) applying a photo-sensitive copying layer to the surface of said blanket, (c) forming a reference copy on said blanket by exposing a positive or negative original which is in contact with said photo-sensitive copying layer, (d) removing the top layer of the unexposed portion of said blanket which is not to receive varnish, whereby said method provides for the pre-location of varnish-free areas prior to mounting said blanket on a rotary offset press, and said pre-location allows the simultaneous mounting and alignment of said blanket and a printing plate on said rotary offset press relative to each other and to the varnish recipient.
Claim 2
Independent Claim
157 words
A method for preparing a blanket for in-line varnishing with dispersion varnishes on an aqueous base or in association with UV-varnish-resistant blankets for the application of low-viscosity UV-varnish in rotary offset presses, comprising: (a) pretreating a blanket suitable for offset printing to increase the adherence of a photo-sensitive copying layer to said blanket, (b) applying a photo-sensitive copying layer to the surface of said blanket, (c) forming a reference copy on said blanket by exposing a positive or negative original which is in contact with said photo-sensitive copying layer, (d) removing the top layer of the unexposed portion of said blanket which is not to receive varnish, whereby said method provides for the pre-location of varnish-free areas prior to mounting said blanket on a rotary offset press, and said pre-location allows the simultaneous mounting and alignment of said blanket and a printing plate on said rotary offset press relative to each other and to the varnish recipient.
Claim 3
Dependent Claim
19 words
A method according to claim 1 wherein said photo-sensitive copying layer is a polyvinyl alcohol solution sensitized by bichromate.
Claim 4
Dependent Claim
23 words
A method according to claim 2 wherein the proportion of bichromate in said polyvinyl alcohol photo-sensitive copying layer is about 4% by volume.
Claim 5
Dependent Claim
16 words
A method according to claim 1 wherein the photo-sensitive copying layer is sensitized by diazo salts.
Claim 6
Dependent Claim
56 words
A method according to claim 1 wherein said photo-sensitive copying layer is applied to said blanket, said blanket being stretched prior to the application of said photo-sensitive copying layer with the same force as required to stretch a blanket on a formed cylinder and, into the same shape it assumes upon mounting on a varnishing cylinder.
Claim 7
Dependent Claim
79 words
A method according to claim 1 wherein the photo-sensitive copying layer is applied to said blanket which is neither stretched nor affixed to any support plate and the positive or negative original used to form a reference copy on said blanket is reduced in the dimension which is parallel to the direction of movement of the material being processed in the press by a percentage equivalent to that experienced by said blanket when stretched and clamped on the cylinder.
Claim 8
Dependent Claim
19 words
A method according to claim 4 wherein the photo-sensitive copying layer is a polyvinyl alcohol solution sensitized by bichromate.
Claim 9
Dependent Claim
23 words
A method according to claim 7 wherein the proportion of bichromate in said polyvinyl alcohol photo-sensitive copying layer is about 4% by volume.
Claim 10
Dependent Claim
16 words
A method according to claim 4 wherein the photo-sensitive copying layer is sensitized by diazo salts.
Claim 11
Dependent Claim
19 words
A method according to claim 5 wherein the photo-sensitive copying layer is a polyvinyl alcohol solution sensitized by bichromate.
Claim 12
Dependent Claim
23 words
A method according to claim 10 wherein the proportion of bichromate in said polyvinyl alcohol photo-sensitive copying layer is about 4% by volume.
Claim 13
Dependent Claim
16 words
A method according to claim 5 wherein the photo-sensitive copying layer is sensitized by diazo salts.
Claim 14
Dependent Claim
20 words
A method according to claim 6 wherein prior to pretreating said blanket, the blanket is affixed to a support plate.
Claim 15
Dependent Claim
56 words
A method according to claim 13 wherein said photo-sensitive copying layer is applied to said blanket, said blanket being stretched prior to the application of said photo-sensitive copying layer with the same force as required to stretch a blanket on a formed cylinder and, into the same shape it assumes upon mounting on a varnishing cylinder.
Claim 16
Dependent Claim
19 words
A method according to claim 14 wherein said photo-sensitive copying layer is a polyvinyl alcohol solution sensitized by bichromate.
Claim 17
Dependent Claim
23 words
A method according to claim 15 wherein the proportion of bichromate in said polyvinyl alcohol photo-sensitive copying layer is about 4% by volume.
Claim 18
Dependent Claim
16 words
A method according to claim 14 wherein the photo-sensitive copying layer is sensitized by diazo salts.
Claim 19
Dependent Claim
73 words
A method according to claim 13 wherein the photo-sensitive copying layer is applied to said blanket which is not stretched and the positive or negative original used to form a reference copy on said blanket is reduced in the dimension which is parallel to the direction of movement of the material being processed in the press by a percentage equivalent to that experienced by said blanket when stretched and clamped on the cylinder.
Claim 20
Dependent Claim
19 words
A method according to claim 18 wherein said photo-sensitive copying layer is a polyvinyl alcohol solution sensitized by bichromate.
Claim 21
Dependent Claim
23 words
A method according to claim 19 wherein the proportion of bichromate in said polyvinyl alcohol photo-sensitive copying layer is about 4% by volume.
Claim 22
Dependent Claim
16 words
A method according to claim 18 wherein the photo-sensitive copying layer is sensitized by diazo salts.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-08-30 | 1992-02-29 | 1992-08-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-30 | 1996-02-29 | 1996-08-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-30 | 2000-02-29 | 2000-08-30 | $7700.00 | Window Closed / Lapsed |