US3577909A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic strapping machine
Assignee: Individual
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Filing: 1968-11-12
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Granted: 1971-05-11
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Expires: 1988-11-12
Abstract
Abstract In an automatic strapping machine in which a strapping band is advanced in one direction in a guide to encircle an article and is then advanced in the opposite direction to engage the article, apparatus for increasing the tension in the band before the ends of the band are fastened together. The apparatus comprises a frame mounted for displacement in both directions along the path of movement of the band, feed rolls carried by the frame to engage the band in the path, drive means for rotating the feed rolls to advance the band first in the one direction and then in the opposite direction, and control means for operating the feed rolls and the frame. The control means causes the band to advance around the article in the first direction until the article is surrounded by the band, then clamps the leading end of the band upon encirclement of the article and interruption of the first means, then drives the feed rolls in the opposite direction and to cause the frame to be displaced along the path toward the article which arrests the feed rolls, and finally operates to forcibly displace the frame away from the article to apply additional tension to tighten the band around the article.
Inventors
- 👤 Masatoshi Takano
- 👤 Hiroshi Arita
- 👤 Hayao Omori
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:48
CPC Classifications
B; B65; B65B; B65B13/00; B65B13/18; B65B13/22
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
333 words
An apparatus for feeding and fastening a band, adopted to an apparatus for plying, welding and cutting parts of a band in an automatic strapping machine, including a swinging frame, the swinging movement of which being transmitted from a cylindrical cam; a driving roller connected with a motor, being arranged on the upper portion of said swinging frame; a top roller being pressed adjustably by and contacted with said driving roller; a pair of guide blocks having leading slots respectively for leading a band through between the driving roller and the top roller arranged on a side of the upper portion of said swinging frame; said pair of guide blocks being positioned symmetrically on the opposite sides of the contacted points of said rollers with each other; an upwardly expanded concavity being formed in one of said leading slot wherewith a jaw is provided, the lower end of which being pivoted on said guide block by a pivot on which said jaw is turned to one side in said concavity, constantly being pressed by a spring, while the Upper surface of said jaw is separated from the inside of the leading slot for forming a space to pass a band; an upper portion of a contact rod being arranged on a fixed board adjustably with a spring rod aside of a contact pin which is inserted into a side of said jaw; a limit switch being fixed to a body of the apparatus to be switched by contacting with a side of said swinging frame turning toward said limit switch, thereby a circuit of a motor is opened to transmit a reverse rotation to the driving roller; said contact rod being contacted with the contact pin of the jaw to be raised, while said swinging frame is being turned by the rotation of said cylindrical cam, so as the upper surface of the jaw to cooperate with the inside of said leading slot of the guide block for holding an securing the band.
Claim 2
Independent Claim
333 words
An apparatus for feeding and fastening a band, adopted to an apparatus for plying, welding and cutting parts of a band in an automatic strapping machine, including a swinging frame, the swinging movement of which being transmitted from a cylindrical cam; a driving roller connected with a motor, being arranged on the upper portion of said swinging frame; a top roller being pressed adjustably by and contacted with said driving roller; a pair of guide blocks having leading slots respectively for leading a band through between the driving roller and the top roller arranged on a side of the upper portion of said swinging frame; said pair of guide blocks being positioned symmetrically on the opposite sides of the contacted points of said rollers with each other; an upwardly expanded concavity being formed in one of said leading slot wherewith a jaw is provided, the lower end of which being pivoted on said guide block by a pivot on which said jaw is turned to one side in said concavity, constantly being pressed by a spring, while the Upper surface of said jaw is separated from the inside of the leading slot for forming a space to pass a band; an upper portion of a contact rod being arranged on a fixed board adjustably with a spring rod aside of a contact pin which is inserted into a side of said jaw; a limit switch being fixed to a body of the apparatus to be switched by contacting with a side of said swinging frame turning toward said limit switch, thereby a circuit of a motor is opened to transmit a reverse rotation to the driving roller; said contact rod being contacted with the contact pin of the jaw to be raised, while said swinging frame is being turned by the rotation of said cylindrical cam, so as the upper surface of the jaw to cooperate with the inside of said leading slot of the guide block for holding an securing the band.
Claim 3
Dependent Claim
226 words
Apparatus for feeding and tightening a band in an automatic strapping machine comprising means to guide the band in a path to encircle the article to be strapped, a frame mounted for displacement along said path, feed rolls carried by said frame to engage the band in said path, drive means for said feed rolls operable to rotate said feed rolls in one direction to feed the band around the article and to rotate the rolls in the opposite direction to pull said band tight around the article, and control means for said drive means including a first means operable to drive said feed rolls in the one direction until said band encircles said article, a second means to clamp the leading end of said band upon completion of said encirclement and interruption of said first means, a third means operable upon operation of said clamping means to drive said feed rolls in the opposite direction; said feed rolls, upon tightening of the band around said article operating to displace said frame along said path toward said article; a fourth means operable in response to displacement of said frame to arrest said feed rolls; and a fifth means operable in response to the arrest of said feed rolls to forcibly displace said frame away from said article to thereby further tighten said band around said article.
Claim 4
Dependent Claim
226 words
Apparatus for feeding and tightening a band in an automatic strapping machine comprising means to guide the band in a path to encircle the article to be strapped, a frame mounted for displacement along said path, feed rolls carried by said frame to engage the band in said path, drive means for said feed rolls operable to rotate said feed rolls in one direction to feed the band around the article and to rotate the rolls in the opposite direction to pull said band tight around the article, and control means for said drive means including a first means operable to drive said feed rolls in the one direction until said band encircles said article, a second means to clamp the leading end of said band upon completion of said encirclement and interruption of said first means, a third means operable upon operation of said clamping means to drive said feed rolls in the opposite direction; said feed rolls, upon tightening of the band around said article operating to displace said frame along said path toward said article; a fourth means operable in response to displacement of said frame to arrest said feed rolls; and a fifth means operable in response to the arrest of said feed rolls to forcibly displace said frame away from said article to thereby further tighten said band around said article.
Claim 5
Dependent Claim
40 words
Apparatus according to claim 2 including a jaw on said frame operable upon said displacement of the frame away from the article to clamp said band against said frame during the terminal portion of its travel away from said article.
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) | 1974-05-10 | 1974-11-09 | 1975-05-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-10 | 1978-11-09 | 1979-05-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-10 | 1982-11-09 | 1983-05-11 | $7700.00 | Window Closed / Lapsed |