US3813162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming relief printing plate from liquid photo-sensitive resin
Assignee: Teijin Ltd
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Filing: 1973-04-27
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Granted: 1974-05-28
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Expires: 1993-04-27
Abstract
Abstract Apparatus for forming a relief printing plate has a spacer frame removably and closely fitted on a hollow structure to hold a transparent cover film therebetween. The hollow structure has a source of ultraviolet rays therein and is closed at its upper portion with a transparent glass plate on which an image bearing negative and the transparent cover film are laminated in that order. The spacer frame has three frame sides for guiding the liquid photo-sensitive resin upon the cover film and one remaining frame side for discharging superfluous resin. The liquid photo-sensitive resin is supplied through the middle side frame of the three frame sides.
Inventors
- 👤 K Watabe
- 👤 K Arai
- 👤 Y Taneda
- 👤 K Naka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:00
CPC Classifications
G; G03; G03B; G03B15/00; G03F; G03F7/00; G03F7/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
171 words
An apparatus for forming a relief printing plate from a liquid photo-sensitive resin comprising: a framework; a hollow structure connected to said framework and closed at its upper portion with a transparent glass plate on which an image bearing negative and a transparent cover film are laminated in that order, said hollow structure having a source of ultraviolet rays therein and a vacuum suction means for bringing said cover film into close contact with said negative placed on said glass plate; a spacer frame removably and closely fitted on said hollow structure to hold said cover film therebetween and having three frame sides for guiding the liquid photo-sensitive resin onto said cover film and one remaining frame side for discharging superfluous resin; means for placing a supporting base plate on said spacer frame, said supporting base plate and said cover film defining therebetween the thickness of said relief printing plate to be formed; and means for supplying the liquid photo-sensitive resin through the middle frame side of said three frame sides.
Claim 2
Independent Claim
171 words
An apparatus for forming a relief printing plate from a liquid photo-sensitive resin comprising: a framework; a hollow structure connected to said framework and closed at its upper portion with a transparent glass plate on which an image bearing negative and a transparent cover film are laminated in that order, said hollow structure having a source of ultraviolet rays therein and a vacuum suction means for bringing said cover film into close contact with said negative placed on said glass plate; a spacer frame removably and closely fitted on said hollow structure to hold said cover film therebetween and having three frame sides for guiding the liquid photo-sensitive resin onto said cover film and one remaining frame side for discharging superfluous resin; means for placing a supporting base plate on said spacer frame, said supporting base plate and said cover film defining therebetween the thickness of said relief printing plate to be formed; and means for supplying the liquid photo-sensitive resin through the middle frame side of said three frame sides.
Claim 3
Dependent Claim
44 words
An apparatus as claimed in claim 1, wherein said spacer frame is fitted in close contact with the upper periphery of said hollow structure and has a channel along said three frame sides thereof for guiding the liquid photo-sensitive resin onto said cover film.
Claim 4
Dependent Claim
95 words
An apparatus as claimed in claim 1, further comprising a supply means for said cover film, said supply means having a supply roll for said cover film, means for guiding said cover film along the underside of said spacer frame under a predetermined tension, and a winder at the front end of said spacer frame, said spacer frame being connected to said framework to be movable from an operative position where said spacer frame is closely fitted on said hollow structure to a rest position which is parallel to but obliquely-upwards of said operative position.
Claim 5
Dependent Claim
187 words
An apparatus as claimed in claim 1, wherein said supply means for the liquid photo-sensitive resin comprises: a storage tank for said liquid photo-sensitive resin, said tank being connected with a compressed air supply means at its upper portion; a measuring container connected with said storage tank through a first valve means, said measuring container having a second valve means through which said container is connected with atmosphere and a third valve means through which said container is connected with a compressed air supply means; a fourth valve means through which said measuring container is connected with said intermediate frame side of said spacer frame; and control means for said four valve means, said control means opening said first and second valve mEans and closing said third and fourth valve means when said resin in said measuring container is decreased to a predetermined amount, said control means closing said first and second valve means and opening said third and fourth valve means when said resin in said container is increased to a predetermined amount and when the supply of said resin into said spacer frame is desired.
Claim 6
Dependent Claim
71 words
An apparatus as claimed in claim 3, wherein said means for placing the supporting base plate on said spacer frame comprises a platform provided at the rear portion of said framework and movable up and down, a stack of the supporting base plates placed upon said platform, and a pressing board for holding and lifting the uppermost supporting base plate and carrying it above said spacer frame at said operative position.
Claim 7
Dependent Claim
77 words
An apparatus as claimed in claim 3, wherein said spacer frame is movably connected to said framework by two pairs of bent arms, each of said bent arms having a first end pivotably connected to said spacer frame, a bent portion pivotably connected to said framework, and a second end pivotably and slidably connected to an upper end of a T-shaped link which is connected to a piston rod of a cylinder at the lower end thereof.
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) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |