US3628504A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable mounting device for electrostatic copier developer magazine
Assignee: Singer Co
•
Filing: 1970-03-23
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Granted: 1971-12-21
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Expires: 1990-03-23
Abstract
Abstract A mounting apparatus for the developer magazine of an electrostatic copier which enables the developer brushxerographically sensitive element spacing to be varied across the width of the brush. Two independently adjustable eccentric cams bear upon the rear of the developer magazine to determine the spacing. A spring-loaded anchor bar is slidably received on spaced guide members secured to the front of the developer magazine to provide a rearward thrust for maintaining the spacing constant independently of dimensional changes in the copier frame units.
Inventors
- 👤 Ray S Richmond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:31
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0896
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
144 words
In an electrostatic copier having a main frame unit, a xerographically sensitive member located in said main frame unit for developing a latent electrostatic image, a second frame unit, and a developer unit carried by said second frame unit for rendering said latent electrostatic image visible, said developer unit having a brush member spaced from said xerographically sensitive member for depositing toner on the surface thereof, and a window for exposing a portion of said brush member, the improvement comprising: spacing means for adjusting the spacing between said brush member and said xerographically sensitive member along the width thereof, and means coupled to said developer unit for coacting with said spacing means to maintain said spacing constant along the width of said brush member and said xerographically sensitive member, whereby said spacing is maintained constant independently of dimensional changes in said copier frame units.
Claim 2
Dependent Claim
144 words
In an electrostatic copier having a main frame unit, a xerographically sensitive member located in said main frame unit for developing a latent electrostatic image, a second frame unit, and a developer unit carried by said second frame unit for rendering said latent electrostatic image visible, said developer unit having a brush member spaced from said xerographically sensitive member for depositing toner on the surface thereof, and a window for exposing a portion of said brush member, the improvement comprising: spacing means for adjusting the spacing between said brush member and said xerographically sensitive member along the width thereof, and means coupled to said developer unit for coacting with said spacing means to maintain said spacing constant along the width of said brush member and said xerographically sensitive member, whereby said spacing is maintained constant independently of dimensional changes in said copier frame units.
Claim 3
Dependent Claim
49 words
The apparatus of claim 1 wherein said spacing means comprises a stop member adjustably mounted on said main frame unit relative to a fixed point thereon for providing a reference abutment surface for said developer unit, and means for firmly anchoring said stop member to said main frame unit.
Claim 4
Dependent Claim
52 words
The apparatus of claim 2 wherein said stop member comprises a rotatable eccentric cam having a threaded radial bore, and said anchoring means comprises a shaft secured to said main frame unit and a lock screw engageable with said threaded bore and the surface of said shaft to lock said cam thereto.
Claim 5
Dependent Claim
114 words
The apparatus of claim 1 wherein said spacing means comprises a shaft journaled at a first end thereof in said main frame unit, a first eccentric cam fixed to said shaft adjacent said first end for providing a first reference abutment surface for said developer unit, a support fixed to said main frame unit for rotatably supporting the other end of said shaft, a second eccentric cam positioned on said shaft adjacent said other end for providing a second reference abutment surface for said developer unit, means for axially adjusting said first and second eccentric cams to a predetermined position, and means for locking said first and second eccentric cams in said predetermined positions.
Claim 6
Dependent Claim
31 words
The apparatus of claim 4 wherein said adjusting means comprises a first knob fixed to said shaft adjacent said other end and a second knob fixed to said second eccentric cam.
Claim 7
Dependent Claim
46 words
The apparatus of claim 5 wherein said support includes a tubular member having a threaded radial bore, and said locking means includes a first lock screw engageable with said threaded radial bore and the surface of said shaft for interlocking said shaft and said tubular member.
Claim 8
Dependent Claim
49 words
The apparatus of claim 6 wherein said second eccentric cam has a threaded radial bore, and said locking means further includes a second lock screw engageable with said threaded radial bore of said second eccentric cam and the surface of said shaft for locking said second eccentric cam thereto.
Claim 9
Dependent Claim
36 words
The apparatus of claim 1 wherein said maintaining means comprises an anchor bar fixed to said second frame unit, and spring means coupled to said anchor bar for urging said developer unit against said spacing means.
Claim 10
Dependent Claim
27 words
The apparatus of claim 8 wherein said spring means comprises first and second spring members located adjacent opposite sides of the front portion of said developer unit.
Claim 11
Dependent Claim
86 words
The apparatus of claim 1 wherein said maintaining means comprises first and second channel members coupled to said frame unit for slidably supporting said developer unit at opposite sides thereof, a pair of guide members secured to and protruding frontwardly of said developer unit, an anchor bar rigidly secured to said second frame unit forwardly of said developer unit and slidably disposed on said guide members, and a pair of spring members coupled to said anchor bar for urging said developer unit against said spacing means.
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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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |