US4302092A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drum processing apparatus
Assignee: Paterson Products Ltd
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Filing: 1979-10-02
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Granted: 1981-11-24
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Expires: 1999-10-02
Abstract
Abstract The invention relates to drum processing apparatus for in the treatment of photographic material. The apparatus comprises a stand, a processing drum rotatably mounted on the stand, and means for intermittently axially displacing processing liquid in the drum causing the liquid to oscillate axially in waves traversing the length of the drum. The drum is axially slidable relative the support. During rotation of the drum, it is variably axially displaced against drum biasing means to cause processing liquid in the drum to oscillate axially. The present apparatus, which is simple and convenient to construct, ensures uniform and continuous contact of the processing liquid over the photographic material treated in the drum.
Inventors
- 👤 George W. Ashton
- 👤 Peter Manning
- 👤 Horace G. Lee
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 02:14
CPC Classifications
G; G03; G03D; G03D13/00; G03D13/02; G03D13/04; G03D13/046
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
117 words
A drum processing apparatus comprising a support, a processing drum for containing processing liquid therein mounted on the support for rotation about its longitudinal axis and axially slidable relative the support, means biasing the drum axially, and manual driving means at one end of the drum for rotating the drum about its longitudinal axis and axially displacing the drum during rotation, said manual driving means generating variable axial displacement forces against the restoring force of the biasing means during manual rotation which impart axial displacement motion to the axially slidable drum against the restoring force of the biasing means, said driving means and biasing means acting together to cause processing liquid in the drum to oscillate axially.
Claim 2
Dependent Claim
117 words
A drum processing apparatus comprising a support, a processing drum for containing processing liquid therein mounted on the support for rotation about its longitudinal axis and axially slidable relative the support, means biasing the drum axially, and manual driving means at one end of the drum for rotating the drum about its longitudinal axis and axially displacing the drum during rotation, said manual driving means generating variable axial displacement forces against the restoring force of the biasing means during manual rotation which impart axial displacement motion to the axially slidable drum against the restoring force of the biasing means, said driving means and biasing means acting together to cause processing liquid in the drum to oscillate axially.
Claim 3
Dependent Claim
157 words
A drum processing apparatus comprising a stand, a processing drum having end walls mounted on the stand for rotation about its longitudinal axis and axially slidable, manual drive means for rotating the drum being connected to the drum so as to permit axially directed impulses from the driving means to be imparted to the drum during rotation thereof, and means biasing the drum axially, said driving means and biasing means acting together to cause processing liquid in the drum to oscillate axially, wherein the processing drum is supported on the stand at one end by means of a hollow tube which is set in an axial cylindrical light-tight aperture in one end wall of the drum, the end of the tube exterior to the drum being in the form of a funnel and the end of the tube within the drum being in fluid communication with the interior of the drum but without permitting entry of light.
Claim 4
Dependent Claim
157 words
A drum processing apparatus comprising a stand, a processing drum having end walls mounted on the stand for rotation about its longitudinal axis and axially slidable, manual drive means for rotating the drum being connected to the drum so as to permit axially directed impulses from the driving means to be imparted to the drum during rotation thereof, and means biasing the drum axially, said driving means and biasing means acting together to cause processing liquid in the drum to oscillate axially, wherein the processing drum is supported on the stand at one end by means of a hollow tube which is set in an axial cylindrical light-tight aperture in one end wall of the drum, the end of the tube exterior to the drum being in the form of a funnel and the end of the tube within the drum being in fluid communication with the interior of the drum but without permitting entry of light.
Claim 5
Dependent Claim
48 words
A drum processing apparatus according to claim 2 wherein the other end of the drum is supported on the stand by means of a dog which engages an axial light-tight aperture in the end wall of the drum, the dog being connected to drive means for the drum.
Claim 6
Dependent Claim
15 words
A drum processing apparatus according to claim 1 wherein the support includes a water bath.
Claim 7
Dependent Claim
182 words
A drum processing apparatus comprising a support, a processing drum having a hollow cylindrical body including end walls for containing processing liquid therein and rotatably mounted on the support, driving means for rotating the drum about a longitudinal axis, means on the interior of the drum including a wave-generating member at one end of the drum responsive to rotation of the drum to create axially directed waves in a bead of processing liquid located at the bottom of the drum which flows over material being processed therein, one of said end walls having an axial cylindrical light-tight aperture, a hollow tube set in said aperture, said drum being rotatably supported at one end by means of said hollow tube, said tube having an exterior, funnel portion and a light tight, interior portion within the drum in fluid communication with the interior of the drum, the other end wall having a second axial light-tight aperture therein, a dog engaging said second aperture, the other end of the drum being rotatably supported by said dog, and means connecting said dog to said driving means.
Claim 8
Dependent Claim
182 words
A drum processing apparatus comprising a support, a processing drum having a hollow cylindrical body including end walls for containing processing liquid therein and rotatably mounted on the support, driving means for rotating the drum about a longitudinal axis, means on the interior of the drum including a wave-generating member at one end of the drum responsive to rotation of the drum to create axially directed waves in a bead of processing liquid located at the bottom of the drum which flows over material being processed therein, one of said end walls having an axial cylindrical light-tight aperture, a hollow tube set in said aperture, said drum being rotatably supported at one end by means of said hollow tube, said tube having an exterior, funnel portion and a light tight, interior portion within the drum in fluid communication with the interior of the drum, the other end wall having a second axial light-tight aperture therein, a dog engaging said second aperture, the other end of the drum being rotatably supported by said dog, and means connecting said dog to said driving means.
Claim 9
Dependent Claim
23 words
A drum processing apparatus according to claim 5 wherein said wave-generating member is asymmetrical with respect to the longitudinal axis of the drum.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-11-23 | 1985-05-25 | 1985-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-23 | 1989-05-25 | 1989-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-23 | 1993-05-25 | 1993-11-24 | $7700.00 | Window Closed / Lapsed |