US4024815A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for spraying powder
Assignee: FIRM ALBIN PLATSCH
•
Filing: 1975-12-16
•
Granted: 1977-05-24
•
Expires: 1995-12-16
Abstract
Abstract A system for feeding powder in spray form to a device associated with a machine which transports products to be sprayed. The device associated with the machine is arranged to spray powder on the work surface in a controlled zone with the system being operated to receive surplus powder from the work zone and return it to storage for re-use.
Inventors
- 👤 Hans Georg Platsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:39
CPC Classifications
B; B05; B05B; B05B7/00; B05B7/14; B05B7/1404; B05B12/00; B05B12/16; B05B12/18; B05B14/00; B05B14/10; B05B14/30; B41; B41F; B41F23/00; B41F23/04; B41F23/06; Y; Y02; Y02P; Y02P70/00; Y02P70/10; Y10; Y10S; Y10S118/00; Y10S118/01
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
150 words
A device for spraying powder, more particularly for spraying powder on freshly printed sheets, comprising at least one powder supply conduit from which powder is sprayed by means of compressed air for the purpose of preventing the individual sheets from being smudged and the powder being drawn off by vacuum in a suction line, characterized in that means comprising a substantially rectangular frame structure provided with a plurality of branched, apertured ducts are arranged to straddle a series of nozzles which emit said spray powder to said sheets, said apertured ducts further including at least one further pair of inboard apertured ducts adapted to communicate with a source of vacuum and at least one pair of additional branched, apertured ducts outboard of said first named ducts, said outboard apertured ducts being adapted to emit a curtain of blast air which serves to return excess spray powder to a separator assembly.
Claim 2
Independent Claim
150 words
A device for spraying powder, more particularly for spraying powder on freshly printed sheets, comprising at least one powder supply conduit from which powder is sprayed by means of compressed air for the purpose of preventing the individual sheets from being smudged and the powder being drawn off by vacuum in a suction line, characterized in that means comprising a substantially rectangular frame structure provided with a plurality of branched, apertured ducts are arranged to straddle a series of nozzles which emit said spray powder to said sheets, said apertured ducts further including at least one further pair of inboard apertured ducts adapted to communicate with a source of vacuum and at least one pair of additional branched, apertured ducts outboard of said first named ducts, said outboard apertured ducts being adapted to emit a curtain of blast air which serves to return excess spray powder to a separator assembly.
Claim 3
Dependent Claim
24 words
A device for spraying powder as claimed in claim 1, in which a further means is associated with said separator assembly for recovering fines.
Claim 4
Dependent Claim
33 words
A device for spraying powder as claimed in claim 1, in which conveying means are arranged to transport the sheet of paper perpendicularly relative to means defining openings in said powder supply conduit.
Claim 5
Dependent Claim
22 words
A device for spraying powder as claimed in claim 3, in which a baffle plate is provided adjacent to said conveying means.
Claim 6
Dependent Claim
26 words
A device for spraying powder as claimed in claim 4, in which the baffle plate includes means defining openings therein which are associated with suction means.
References Cited (Backward Citations)
US2288129A
Cited
US2897743A
Cited
US3053180A
Cited
GB1154543A
Cited
US3478969A
Cited
US3516607A
Cited
US3678894A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-05-23 | 1980-11-22 | 1981-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-05-23 | 1984-11-22 | 1985-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-05-23 | 1988-11-22 | 1989-05-24 | $7700.00 | Window Closed / Lapsed |