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Patent US3645430A successfully refreshed from Google Patents.
US3645430A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for driving a sheath at variable and automatically adjustable speed in a machine for making plastic bags
Assignee: SOFAMECA Sarl
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Filing: 1970-05-15
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Granted: 1972-02-29
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Expires: 1990-05-15
Abstract
Abstract This invention relates to a device for driving a sheath at variable and automatically adjustable speed, characterized in that the members for controlling the speed of the two motor speed regulators are connected respectively by a transmission to two shafts on which are keyed two planetary pinions of a differential, the cage of which carrying the satellite pinions may be rotated during the displacement of a set of free rollers on which the sheath is wound.
Inventors
- 👤 Georges Lagain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:39
CPC Classifications
B; B65; B65B; B65B65/00; B65B65/02; B65H; B65H23/00; B65H23/04; B65H23/18; B65H23/188; B65H23/1888; B31; B31B; B31B70/00; B31B70/02; B31B70/10; B65H2511/00; B65H2511/10; B65H2511/11; B65H2511/112; B65H2513/00; B65H2513/10
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
124 words
A device for driving a sheath at variable and automatically adjustable speed in a machine for manufacturing plastic bags, in which the sheath driving device comprises, a differential having a rotatable cage, a first pair of drive rollers, a series of fixed and movable freely rotatable rollers, and a second pair of drive rollers, each pair of drive rollers being actuated by a motor speed regulator, wherein the members for controlling the speed of the two motor speed regulators are respectively connected by a transmission to two shafts on which are keyed two planetary pinions on said differential, said cage of said differential carrying the satellite pinions and rotatable during the displacement of a set of free rollers on which the sheath is wound.
Claim 2
Independent Claim
124 words
A device for driving a sheath at variable and automatically adjustable speed in a machine for manufacturing plastic bags, in which the sheath driving device comprises, a differential having a rotatable cage, a first pair of drive rollers, a series of fixed and movable freely rotatable rollers, and a second pair of drive rollers, each pair of drive rollers being actuated by a motor speed regulator, wherein the members for controlling the speed of the two motor speed regulators are respectively connected by a transmission to two shafts on which are keyed two planetary pinions on said differential, said cage of said differential carrying the satellite pinions and rotatable during the displacement of a set of free rollers on which the sheath is wound.
Claim 3
Independent Claim
174 words
A device for driving a sheath at variable and automatically adjustable speed in a machine for manufacturing plastic bags, in which the sheath driving device comprises, a differential having a rotatable cage, a first pair of drive rollers, a series of fixed and movable freely rotatable rollers, said movable rollers being mounted on support means so as to permit their vertical displacement and having an actuator member capable of acting selectively during passage on two stop members fixed at a certain distance from one another on a linearly moving member connected to said cage of said differential, and a second pair of drive rollers, each pair of drive rollers being actuated by a motor speed regulator, wherein the members for controlling the speed of the two motor speed regulators are respectively connected by a transmission to two shafts on which are keyed two planetary pinions of said differential, said cage of said differential carrying the satellite pinions being rotatable during the displacement of a set of free rollers on which the sheath is wound.
Claim 4
Independent Claim
174 words
A device for driving a sheath at variable and automatically adjustable speed in a machine for manufacturing plastic bags, in which the sheath driving device comprises, a differential having a rotatable cage, a first pair of drive rollers, a series of fixed and movable freely rotatable rollers, said movable rollers being mounted on support means so as to permit their vertical displacement and having an actuator member capable of acting selectively during passage on two stop members fixed at a certain distance from one another on a linearly moving member connected to said cage of said differential, and a second pair of drive rollers, each pair of drive rollers being actuated by a motor speed regulator, wherein the members for controlling the speed of the two motor speed regulators are respectively connected by a transmission to two shafts on which are keyed two planetary pinions of said differential, said cage of said differential carrying the satellite pinions being rotatable during the displacement of a set of free rollers on which the sheath is wound.
Claim 5
Dependent Claim
90 words
A drive device as defined in claim 2, wherein the means for supporting the movable rollers comprise two endless chains mounted on two pairs of toothed wheels, two support members carried on one side of said chains in which the ends of said rollers are rotatably mounted, one of said chains carrying on the other side a boss capable of coming into contact with two stop members mounted on endless chain mounted on a pair of toothed wheels, one of said wheels being unitary with said cage of said dIfferential.
Claim 6
Dependent Claim
38 words
A drive device as defined in claim 2, wherein a pair of movement reversing pinions is mounted between the shaft on which is keyed one of said planetary pinions and said transmission controlling one of said speed regulators.
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) | 1975-02-28 | 1975-08-30 | 1976-02-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-28 | 1979-08-30 | 1980-02-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-28 | 1983-08-30 | 1984-02-29 | $7700.00 | Window Closed / Lapsed |