US3700142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Powder dispensing unit
Assignee: Singer Co
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Filing: 1971-09-20
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Granted: 1972-10-24
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Expires: 1991-09-20
Abstract
Abstract A powder dispensing unit suitable for use as a copier developer unit for developing a latent image with a dry toner powder. A magnetic roller and an auger are rotatably mounted in a housing: the roller having a power takeoff gear at one end and a power transfer gear and a camming disc at the other; the auger having an end-mounted driven gear mated with the power transfer gear. An end portion of the auger is mounted in a feed block having an upwardly extending chute aperture permitting toner feed upwardly toward an inlet portion of a toner distributor unit, which is reciprocably mounted in the housing. A rocker arm having a roller at each end-one contacting an undulating surface of the camming disc, the other contacting a camming post-reciprocates the toner distributor unit laterally in the housing. The toner distributor unit has a sloping, slotted distributor channel and a pair of sloping surfaces for gravity feeding toner powder therealong, and a trimming member to remove toner from the roller for admixture with toner fed along the distributor channel from the inlet.
Inventors
- 👤 Helmut K Waibel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:31
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0822; G03G15/09; Y; Y10; Y10S; Y10S222/00; Y10S222/01
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
97 words
A powder dispensing unit for distributing powder along a work surface comprising: a housing; a roller rotatably mounted in said housing for axial rotation, said roller having a surface for releasably adhering said powder thereto, said surface having a main working portion and an auxiliary working portion; a powder distributing unit reciprocably mounted adjacent said roller for distributing said powder along said main working portion, said distributing unit having an inlet portion adjacent said auxiliary working surface for removing powder therefrom; and means for feeding said powder from the vicinity of said roller toward said inlet portion.
Claim 2
Dependent Claim
97 words
A powder dispensing unit for distributing powder along a work surface comprising: a housing; a roller rotatably mounted in said housing for axial rotation, said roller having a surface for releasably adhering said powder thereto, said surface having a main working portion and an auxiliary working portion; a powder distributing unit reciprocably mounted adjacent said roller for distributing said powder along said main working portion, said distributing unit having an inlet portion adjacent said auxiliary working surface for removing powder therefrom; and means for feeding said powder from the vicinity of said roller toward said inlet portion.
Claim 3
Dependent Claim
42 words
The apparatus of claim 1 wherein said roller includes a first driven gear for providing power transfer from an associated power source, a second gear for driving said powder feeding means, and means for providing oscillatory motion for driving said distributing unit.
Claim 4
Dependent Claim
18 words
The apparatus of claim 2 wherein said oscillatory motion means comprises a camming disc having an undulating surface.
Claim 5
Dependent Claim
131 words
The apparatus of claim 1 wherein said powder distributing unit comprises a first powder distributing surface inclined downwardly and rearwardly of said roller; a second powder distributing surface positioned below said first surface and inclined downwardly toward the front of said unit, said first and second surfaces converging at the rear of said powder distributing unit; a trimming member located between said roller and said first surface for removing portions of said powder from said roller; a slotted distributor channel disposed generally diagonally of said first surface an inclined to provide powder movement therealong, said powder inlet being coupled to said channel; and means for slidably mounting said surfaces, said trimming member and said channel in said housing; and further including means for reciprocating said powder distributing unit in said housing.
Claim 6
Dependent Claim
65 words
The apparatus of claim 1 wherein said reciprocating means comprises a camming post extending from said powder distributing unit and secured thereto, means coupled to said roller for providing oscillatory motion, a rocker arm having a first end coupled to said oscillatory motion means and a second end coupled to said camming post, and a means for biasing said distributing unit to a rest position.
Claim 7
Dependent Claim
22 words
The apparatus of claim 5 wherein said first and second ends of said rocker arm are each provided with a camming roller.
Claim 8
Dependent Claim
26 words
The apparatus of claim 5 wherein said biasing means comprises a means secured to said housing having a tension member coupled to said powder distributing unit.
Claim 9
Dependent Claim
62 words
The apparatus of claim 4 wherein said distributor channel includes a first channel portion for distributing said powder onto a first portion of said first surface, a second channel portion for distributing said powder onto a second portion of said first surface and an adjustable gate for varying the amount of said powder introduced into said first and said second channel portions.
Claim 10
Dependent Claim
68 words
The apparatus of claim 1 wherein said powder feeding means comprises an auger rotatably disposed substantially parallel with said roller, and a feed block mounted adjacent said powder inlet and surrounding a portion of said auger, said feed block having an upwardly extending chute opening for permitting upward movement of said powder, said portion of said auger having a disc member for assisting upward movement of said powder.
Claim 11
Dependent Claim
16 words
The apparatus of claim 1 further including doctor member for trimming excess powder from said roller.
Claim 12
Dependent Claim
29 words
The apparatus of claim 1 wherein said powder comprises a developer toner having a magnetic component and said roller comprises a magnetic roller for forming a toner brush therewith.
References Cited (Backward Citations)
US3003462A
Cited
US3224649A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-24 | 1976-04-24 | 1976-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-24 | 1980-04-24 | 1980-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-24 | 1984-04-24 | 1984-10-24 | $7700.00 | Window Closed / Lapsed |