US3829208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copying apparatus
Assignee: Canon Production Printing Holding BV
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Filing: 1972-02-02
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Granted: 1974-08-13
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Expires: 1992-02-02
Abstract
Abstract An apparatus for forming images on light-sensitive web material and transferring them to copying material comprises a rotatable slotted hollow drum having processing means disposed about its periphery and having the lightsensitive web material trained from a supply roll inside the drum over the outer surface of the drum to holding means in the slot of the drum, which means include means operable when the drum is in a rest position to displace the web material outwards and into engagement with fixed web propelling means so that, whenever desired, the drum may be stopped and a used length of the web material removed from its surface and replaced by a fresh length drawn from the supply roll. The material leading off the drum is severed by causing the propelling means or renewed drum rotation to tear it off, or by causing the same to draw it taut against a knife edge that cuts it off.
Inventors
- 👤 Meijel H Van
- 👤 Der Sterren M Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:21
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/75; G03G15/751; G03G15/752
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
271 words
Copying apparatus comprising a rotatable hollow drum having a slot in its peripheral wall, a roll of light-sensitive or sensitizable continuous web material mounted rotatably inside said drum, a length of said material being trained from said roll through said slot and thence upon and about the outer surface of said drum, means mounted on said drum in the vicinity of said slot for engaging and holding an end portion of said length so trained about said drum, and processing means disposed about said drum and operable during each revolution there of to form an image on the web material upon said surface and to transfer such image to a copy material, wherein said holding means includes means drivable when said drum is in a certain rest position thereof to displace the web material engaged by said holding means outwards from said drum and said apparatus further comprises means spaced away from said drum at a fixed location outside said drum for propelling away from said drum the web material displaced outwards therefrom by said web displacing means when said drum is in said rest position thereof, whereby a used length of the web material is removed from said outer surface and simultaneously a corresponding length of web material is drawn from said roll and trained upon said surface in replacement of said used length thereon, means operable when said drum is in said rest position for driving said web displacing means and said propelling means simultaneously, and means for severing the said used length at a location adjacent to said drum between said web displacing means and said propelling means.
Claim 2
Dependent Claim
271 words
Copying apparatus comprising a rotatable hollow drum having a slot in its peripheral wall, a roll of light-sensitive or sensitizable continuous web material mounted rotatably inside said drum, a length of said material being trained from said roll through said slot and thence upon and about the outer surface of said drum, means mounted on said drum in the vicinity of said slot for engaging and holding an end portion of said length so trained about said drum, and processing means disposed about said drum and operable during each revolution there of to form an image on the web material upon said surface and to transfer such image to a copy material, wherein said holding means includes means drivable when said drum is in a certain rest position thereof to displace the web material engaged by said holding means outwards from said drum and said apparatus further comprises means spaced away from said drum at a fixed location outside said drum for propelling away from said drum the web material displaced outwards therefrom by said web displacing means when said drum is in said rest position thereof, whereby a used length of the web material is removed from said outer surface and simultaneously a corresponding length of web material is drawn from said roll and trained upon said surface in replacement of said used length thereon, means operable when said drum is in said rest position for driving said web displacing means and said propelling means simultaneously, and means for severing the said used length at a location adjacent to said drum between said web displacing means and said propelling means.
Claim 3
Dependent Claim
48 words
Copying apparatus according to claim 1, and means operable to discontinue the driving of said web displacing means while continuing the driving of said propelling means, so that the web material being propelled by the latter will be severed from the web material held by said holding means.
Claim 4
Dependent Claim
26 words
Copying apparatus according to claim 1, said severinG means comprising means for cutting through web material leading from said web displacing means to said propelling means.
Claim 5
Dependent Claim
57 words
Copying apparatus according to claim 1, said holding means comprising a roller and a clamping member normally bearing against said roller so as to grip said web material therebetween, said roller constituting at least part of said web displacing means and being rotatable to displace the web material engaged thereby outwards from said drum via said slot.
Claim 6
Dependent Claim
60 words
Copying apparatus according to claim 4, further comprising guide means for directing in a curved path the web material moved from said roller to said propelling means, said serving means including a knife positioned to cut through that web material at a location near to said roller when the same is drawn taut between said roller and said propelling means.
Claim 7
Dependent Claim
13 words
Copying apparatus according to claim 5, said knife having a serrated cutting edge.
Claim 8
Dependent Claim
49 words
Copying apparatus according to claim 5, further comprising a curved guide member mounted on said drum and partially embracing said roller, said guide member having a serrated outer edge constituting said knife, said edge extending to a point over a part of said curved path of the web material.
Claim 9
Dependent Claim
36 words
Copying apparatus according to claim 4, said clamping member being displaceable away from said roller in order to interrupt the gripping action and to facilitate threading of a free end portion of the web material therebetween.
Claim 10
Dependent Claim
24 words
Copying apparatus according to claim 1, further comprising means in said drum for tensioning the web material trained onto said drum from said roll.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-12 | 1978-02-11 | 1978-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-12 | 1982-02-11 | 1982-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-12 | 1986-02-11 | 1986-08-13 | $7700.00 | Window Closed / Lapsed |