US3760990A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for supplying powder
Assignee: Oxy Dry Sprayer Corp
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Filing: 1971-08-02
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Granted: 1973-09-25
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Expires: 1991-08-02
Abstract
Abstract An apparatus for supplying or transporting powder to a dispenser comprising an endless chain which is held taut between a drive wheel having a the rear surface shaped to accept the chain and turn-around wheel. To minimize strain, tension and the like, the drive and turn-around wheels are positioned to maintain the chain in a single plane. In the preferred embodiment, the motor for the drive wheel is mounted to automatically compensate for the development of any strain, tension or the like on the endless chain that would otherwise disturb the operation.
Inventors
- 👤 J Lindquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 07:52
CPC Classifications
B; B65; B65G; B65G23/00; B65G23/44; B05; B05B; B05B5/00; B05B5/025; B05B5/057; B05B5/08; B05B5/14; B65G19/00; B65G19/14; B65G19/16; Y; Y10; Y10S; Y10S222/00; Y10S222/01
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
215 words
An apparatus for applying a film of powder upon a surface moving under the apparatus which comprises a powder reservoir, a sprayer hopper, a dispensing roller journalled in said hopper for rotation, means for rotating said dispensing roller, a metering blade positioned to cooperate with said dispensing roller to provide an egress for the powder, an endless chain in communication with said reservoir and said hopper, a drive wheel for said endless chain, a turn-around wheel spatially disposed from said drive wheel and cooperating with said wheel for holding said chain substantially taut, said drive and turn-around wheels being positioned to maintain said chain in substantially a single plane, a conduit surrounding at least a portion of said chain in said hopper and having a series of spaced holes communicating with said hopper and means for driving said drive wheel, and means for compensating for the development of tension on the chain including a resilient mounting for the drive wheel and the means for driving the drive wheel a stationary support for said driving means that permits relative rotative movement between said driving means and said support, the position of said driving means remaining constant relative to said drive wheel when said drive wheel moves to compensate for the development of tension on said chain.
Claim 2
Independent Claim
215 words
An apparatus for applying a film of powder upon a surface moving under the apparatus which comprises a powder reservoir, a sprayer hopper, a dispensing roller journalled in said hopper for rotation, means for rotating said dispensing roller, a metering blade positioned to cooperate with said dispensing roller to provide an egress for the powder, an endless chain in communication with said reservoir and said hopper, a drive wheel for said endless chain, a turn-around wheel spatially disposed from said drive wheel and cooperating with said wheel for holding said chain substantially taut, said drive and turn-around wheels being positioned to maintain said chain in substantially a single plane, a conduit surrounding at least a portion of said chain in said hopper and having a series of spaced holes communicating with said hopper and means for driving said drive wheel, and means for compensating for the development of tension on the chain including a resilient mounting for the drive wheel and the means for driving the drive wheel a stationary support for said driving means that permits relative rotative movement between said driving means and said support, the position of said driving means remaining constant relative to said drive wheel when said drive wheel moves to compensate for the development of tension on said chain.
Claim 3
Dependent Claim
43 words
The apparatus of claim 1 wherein increasing tension on the chain causes the means for compensating for the development of tension to allow the drive wheel and the means for driving the drive wheel to rotate in a fashion to dissipate the tension.
Claim 4
Dependent Claim
26 words
The apparatus of claim 1 wherein said chain is shaped so that the powder in said conduit is generally forced toward the center of the conduit.
Claim 5
Dependent Claim
15 words
The apparatus of claim 3 wherein said chain consists of a series of interconnected links.
Claim 6
Dependent Claim
23 words
The apparatus of claim 1 wherein said drive wheel has its peripheral surface formed with shapes complemental to the exterior of said chain.
Claim 7
Dependent Claim
14 words
The apparatus of claim 1 wherein agitating means are positioned in said powder reservoir.
Claim 8
Dependent Claim
55 words
The apparatus of claim 6 wherein said agitating means consists of a rotatable member having at least two spaced arms and a torque source, the member being positioned in said reservoir so that at least one of said arms is positioned above said endless chain and rotates in an arc slightly above the endless chain.
Claim 9
Dependent Claim
26 words
The apparatus of claim 6 wherein timing means are included to intermittently actuate said driving means and torque source simultaneously for a predetermined amount of time.
Claim 10
Dependent Claim
21 words
The apparatus of claim 1 wherein a conduit encircles said chain from the inlet to said reservoir to said drive wheel.
Claim 11
Dependent Claim
23 words
The apparatus of claim 1 wherein the conduit and chain inlet are position to be substantially directly above the egress of the powder.
Claim 12
Dependent Claim
42 words
The apparatus of claim 10 wherein the conduit encircles the chain throughout substantially all of its travel and the outlet side of said chain and the encircling conduit is positioned on the side of said dispensing roller opposite from the powder egress.
Claim 13
Independent Claim
197 words
An apparatus for applying a film of powder upon a surface moving under the apparatus which comprises: a powder reservoir; a dispenser for the powder; an endless chain in communication with said reservoir and said dispenser; a drive wheel for said endless chain; a turn-around wheel spatially disposed from said drive wheel and cooperating with said wheel for holding said chain substantially taut; said drive and turn-around wheels being positioned to maintain said chain in substantially a single plane substantially parallel to the surface upon which the film of powder is being applied; a conduit surrounding at least a portion of said chain in said dispenser and having a series of spaced holes communicating with said dispenser; a drive means for driving said drive wheel; gear means operably connecting the drive means and the drive wheel; a stationary mounting for said drive means, the mounting permitting limited rotating movement of the drive means, gear means and drive wheel relative thereto; and, spring means biasing the drive means, gear means and drive wheel to prevent rotation, increased tension on the chain being effective to cause said rotation and overcome the spring means, thereby causing the tension to dissipate.
Claim 14
Independent Claim
197 words
An apparatus for applying a film of powder upon a surface moving under the apparatus which comprises: a powder reservoir; a dispenser for the powder; an endless chain in communication with said reservoir and said dispenser; a drive wheel for said endless chain; a turn-around wheel spatially disposed from said drive wheel and cooperating with said wheel for holding said chain substantially taut; said drive and turn-around wheels being positioned to maintain said chain in substantially a single plane substantially parallel to the surface upon which the film of powder is being applied; a conduit surrounding at least a portion of said chain in said dispenser and having a series of spaced holes communicating with said dispenser; a drive means for driving said drive wheel; gear means operably connecting the drive means and the drive wheel; a stationary mounting for said drive means, the mounting permitting limited rotating movement of the drive means, gear means and drive wheel relative thereto; and, spring means biasing the drive means, gear means and drive wheel to prevent rotation, increased tension on the chain being effective to cause said rotation and overcome the spring means, thereby causing the tension to dissipate.
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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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |