US3858507A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cylindrical stencil with plastic end rings
Assignee: Cranston Print Works Co
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Filing: 1973-04-09
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Granted: 1975-01-07
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Expires: 1993-04-09
Abstract
Abstract An end ring for supporting a thin, perforate cylindrical printing member the end ring having printing member supporting and securing structure comprising integral electrical insulating plastic first, second, third, and fourth coaxial cylindrical portions. The first and third portions have a first outer diameter substantially equal to the inner diameter of the perforate member, the second portion has an outer diameter less than that first outer diameter and also has a roughened outer cylindrical surface, and the fourth portion has an outer diameter equal to the outer diameter of the perforate member. Also shown is a printing roll unit comprising a cylindrical perforate member secured, at each end, to such an end ring by an adhesive disposed on the roughened surface of the end ring''s second portion.
Inventors
- 👤 Erling Owren
- 👤 William Mcelroy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:14
CPC Classifications
B; B41; B41F; B41F15/00; B41F15/14; B41F15/34; B41F15/38; Y; Y10; Y10S; Y10S118/00; Y10S118/15
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
92 words
An end ring for supporting a thin, perforate cylindrical printing member the end ring having printing member supporting and securing structure comprising integral electrically insulating plastic first, second, third, and fourth coaxial cylindrical portions, said first and third portions having a first outer diameter substantially equal to the inner diameter of said perforate member, said second portion having an outer diameter less than said first outer diameter and also having a roughened outer cylindrical surface, and said fourth portion having an outer diameter equal to the outer diameter of said perforate member.
Claim 2
Dependent Claim
92 words
An end ring for supporting a thin, perforate cylindrical printing member the end ring having printing member supporting and securing structure comprising integral electrically insulating plastic first, second, third, and fourth coaxial cylindrical portions, said first and third portions having a first outer diameter substantially equal to the inner diameter of said perforate member, said second portion having an outer diameter less than said first outer diameter and also having a roughened outer cylindrical surface, and said fourth portion having an outer diameter equal to the outer diameter of said perforate member.
Claim 3
Dependent Claim
26 words
An end ring as claimed in claim 1 wherein said outer diameter of said second portion is approximately 0.0020 inch less than said first outer diameter.
Claim 4
Dependent Claim
17 words
An end ring as claimed in claim 2 wherein said first outer diameter is approximately eight inches.
Claim 5
Dependent Claim
26 words
An end ring as claimed in claim 1 wherein said outer diameter of said fourth portion is approximately 0.007 inch greater than said first outer diameter.
Claim 6
Dependent Claim
33 words
An end ring as claimed in claim 1 wherein each of said first and third portions has an axial length equal to at least one half the axial length of said second portion.
Claim 7
Dependent Claim
26 words
An end ring as claimed in claim 5 wherein the axial length of said first portion is greater than the axial length of said second portion.
Claim 8
Dependent Claim
141 words
A printing roll unit comprising: a thin, perforate, open-end cylindrical member having a predetermined inner diameter and a predetermined outer diameter; a pair of unitary electrically insulating plastic end rings disposed respectively in the open ends of the perforated member; said cylindrical member being secured to each end ring by an adhesive; wherein each end ring comprises first, second, third and fourth coaxial cylindrical portions, said first and third portions having outer surfaces in contact with the inner surface of said perforate member, said second portion having an outer diameter less than said perforate member inner diameter and having its outer surface roughened, and said fourth portion having an outer diameter equal to said perforate member outer diameter; said adhesive disposed on said roughened outer surface of said second portion and contacting the portion of said perforate member overlying that surface.
Claim 9
Dependent Claim
141 words
A printing roll unit comprising: a thin, perforate, open-end cylindrical member having a predetermined inner diameter and a predetermined outer diameter; a pair of unitary electrically insulating plastic end rings disposed respectively in the open ends of the perforated member; said cylindrical member being secured to each end ring by an adhesive; wherein each end ring comprises first, second, third and fourth coaxial cylindrical portions, said first and third portions having outer surfaces in contact with the inner surface of said perforate member, said second portion having an outer diameter less than said perforate member inner diameter and having its outer surface roughened, and said fourth portion having an outer diameter equal to said perforate member outer diameter; said adhesive disposed on said roughened outer surface of said second portion and contacting the portion of said perforate member overlying that surface.
Claim 10
Dependent Claim
34 words
A printing roll unit as claimed in claim 7 wherein each of said first and third portions has an axial length equal to at least one half the axial length of said second portion.
Claim 11
Dependent Claim
27 words
A printing roll unit as claimed in claim 8 wherein the axial length of said first portion is greater than the axial Length of said second portion.
Claim 12
Dependent Claim
17 words
A printing roll unit as claimed in claim 7 wherein each end ring is formed from polyterephthalate.
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) | 1978-01-06 | 1978-07-08 | 1979-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-06 | 1982-07-08 | 1983-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-06 | 1986-07-08 | 1987-01-07 | $7700.00 | Window Closed / Lapsed |