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US 4,068,942 AGranted
Advanced photoreceptor
AssigneeXerox Corporation
InventorRichard C. Penwell
Life of this patent
Estimating the term…
Abstract
An advanceable photoreceptor comprising a hollow drum and an elongated web of photosensitive material the bulk of which is supported internally of the hollow drum while a portion thereof is supported on the outer surface of the drum. The bulk of the photosensitive web material is supported internally of the hollow drum by means of a supply roll and a takeup roll which are supported for repositioning periodically in order to provide for the accommodation of a greater length of photosensitive web material than heretofore possible.
Claims3
Advanceable photoreceptor apparatus comprising:
- a hollow drum having slot means substantially coextensive with the longitudinal axis of said drum;
- an elongated photosensitive web;
- means for supporting a major portion of said photosensitive web internally of said drum while a smaller portion thereof is trained through said slot means over the outer surface of said drum, said major portion supporting means comprising a supply member and a takeup member;
- means for effecting periodic movement of said photosensitive web from said supply member to said takeup member;
- means for stationarily supporting said supply and takeup members in various positions internally of said drum;
- means for effecting periodic repositioning of said members independently of movement of said photosensitive web after a predetermined quantity of photoreceptor has been transferred from said supply member to said takeup member;
- and
- said means for periodically repositioning said members including a threaded rod operatively coupled to supports for said members.
5 more elements
Advanceable photoreceptor apparatus comprising:
- a hollow drum having slot means substantially coextensive with the longitudinal axis of said drum;
- an elongated photosensitive web;
- means for supporting a major portion of said photosensitive web internally of said drum while a smaller portion thereof is trained through said slot means over the outer surface of said drum, said major portion supporting means comprising a supply member and a takeup member;
- means for effecting periodic movement of said photosensitive web from said supply member to said takeup member;
- means for stationarily supporting said supply and takeup members in various positions internally of said drum, and
- means for effecting periodic repositioning of said members independently of movement of said photosensitive web after a predetermined quantity of photoreceptor has been transferred from said supply member to said takeup member;
- the maximum length (l) of said photosensitive web being determined in accordance with the formulas:
- l = .pi. (R.sub.o2.sup.2 - R.sub.i2.sup.2)/.DELTA.r;
- R.sub.o1 = .sqroot.R.sub.o2.sup.2 + R.sub.i1.sup.2 and .sqroot.2
- d = 2r.sub.o2 + 2r.sub.o1 + x
- where
- l = length of the photoreceptor web
- R.sub.o2 = initial outside radius of the supply roll
- R.sub.i2 = inside radius of the supply roll
- .DELTA.r = the thickness of web
- R.sub.o1 = outside radius of the takeup roll when it and the supply roll are equal in size
- R.sub.i1 = inside radius of takeup roll
- d = maximum allowable space for the system in a drum, and
- x = the distance between the outside of the supply and takeup rolls at any time.
16 more elements
Dependencies are inferred from the claim text.