US3894636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air control for bag-stacking machine arms
Assignee: FMC Corp
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Filing: 1974-01-02
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Granted: 1975-07-15
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Expires: 1994-01-02
Abstract
Abstract The arms of a bag-stacking machine have vacuum pickup ports by which they pick up bags from a bag-making machine and deliver the bags to the next point. The next point may be wickets or a tray. The arms are connected to a vacuum ports which turn the vacuum on and off and, to assure release of the bags, the arms are connected to receive a puff of pressurized air to release the bags.
Inventors
- 👤 Egidio L Tonus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:49
CPC Classifications
B; B65; B65H; B65H29/00; B65H29/38; B65H29/40; B31; B31B; B31B70/00; B31B70/74; B31B70/92; B31B70/98; B31B70/984; B65H2404/00; B65H2404/60; B65H2404/65; B65H2404/655; B65H2404/6551; B65H2701/00; B65H2701/10; B65H2701/12; B65H2701/121; B65H2701/1212; B65H2701/19; B65H2701/191
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
169 words
An air control for a bag-stacking machine having a continuously rotating hub and having a bag pickup arm on said rotating hub, said bag pickup arm having bag pickup openings therein, said bag pickup openings on said arm being connected to a port on said rotating hub, a relatively stationary manifold, a manifold port connected continuously to a source of vacuum, said hub port being in alignment with said manifold vacuum port in predetermined relative angular position between said rotating hub and said manifold so that said bag pickup openings can carry bags thereon, the improvement comprising: an air pressure port in said manifold away from said vacuum port so that, as said arm and said hub rotate and said hub port passes away from said manifold vacuum port, said hub port passes into communication with said air pressure port for the delivery of air under pressure into said arm to overcome the previous vacuum in said arm to release a bag carried upon the openings in said arm.
Claim 2
Dependent Claim
169 words
An air control for a bag-stacking machine having a continuously rotating hub and having a bag pickup arm on said rotating hub, said bag pickup arm having bag pickup openings therein, said bag pickup openings on said arm being connected to a port on said rotating hub, a relatively stationary manifold, a manifold port connected continuously to a source of vacuum, said hub port being in alignment with said manifold vacuum port in predetermined relative angular position between said rotating hub and said manifold so that said bag pickup openings can carry bags thereon, the improvement comprising: an air pressure port in said manifold away from said vacuum port so that, as said arm and said hub rotate and said hub port passes away from said manifold vacuum port, said hub port passes into communication with said air pressure port for the delivery of air under pressure into said arm to overcome the previous vacuum in said arm to release a bag carried upon the openings in said arm.
Claim 3
Dependent Claim
42 words
The apparatus of claim 1 including: a plurality of pairs of said arms, each of said plurality of pairs of arms being successively connected to said manifold vacuum port and subsequently to said manifold air pressure port as said rotating hub rotates.
Claim 4
Dependent Claim
48 words
The apparatus of claim 2 including: two of said rotating hubs, said rotating hubs being connected together to rotate together, and two of said manifolds, with each one of said manifolds being positioned in connection with a respective one of said hubs for the control of air thereto.
Claim 5
Dependent Claim
51 words
The apparatus of claim 1 wherein: an air pressure line is connected to an air control valve and said control valve is connected to said air pressure port, and means connected to said air control valve to turn on said air control valve when said arm is in a predetermined position.
Claim 6
Dependent Claim
41 words
The apparatus of claim 4 wherein: said means for operating said air valve comprises a cam, said cam being rotatably driven to rotate with said rotating hub so that said cam operates said air valve in accordance with rotating hub position.
Claim 7
Dependent Claim
45 words
The apparatus of claim 5 wherein: said air pressure port in said manifold is positioned sufficiently close to said vacuum port in said manifold that said port in said rotating hub overlaps both said pressure port and said vacuum port at the same angular position.
Claim 8
Dependent Claim
31 words
The apparatus of claim 6 wherein: said valve is actuated to turn on air to said air pressure port when said hub port is positioned only over said air pressure port.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |