US3762128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for forming and filling bags
Assignee: Scan Coin AB
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Filing: 1971-09-28
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Granted: 1973-10-02
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Expires: 1991-09-28
Abstract
Abstract An apparatus for forming and filling bags of heat sealable packaging material supplied as at least one web has heat sealing jaws for sealing the web when it has been shaped into a tube which are positively coordinated with a brake for the web and a device for forming a loop of the web in such a manner that a loop is formed with the jaws closed and the brake disengaged and is straightened out with the jaws open and the brake engaged when the web is being pulled down under the action of the weight of material filled into the bag.
Inventors
- 👤 I Persson
- 👤 J Nissmo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:54
CPC Classifications
B; B65; B65B; B65B9/00; B65B9/06; B65B9/08; B29; B29C; B29C66/00; B29C66/80; B29C66/81; B29C66/814; B29C66/8145; B29C66/81457
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
253 words
Apparatus for forming and filling bags of heat sealable packaging material supplied as at least one web comprising means for forming a loop of the web; a guide housing enclosing the web over a substantially vertical length thereof in order to shape the web into a tube and forming side openings to expose marginal portions of the length of the web enclosed by the guide housing; swingers mounted on either sides of the web of packaging material when shaped into a tube in the guide housing; first heat sealing jaws for longitudinal sealing of the web at the exposed marginal portions thereof; second heat sealing jaws for transverse sealing of portions of the web projecting from the guide housing at the lower end thereof; said first and second heat sealing means being supported by the swingers; driving means for pivoting the swingers to move the sealing means supported thereby between opened and closed positions; a brake for the web of packaging material; operating means for engaging and disengaging the brake; means operatively interconnecting the swinger driving means, the brake operating means, and the loop forming means to lengthen the loop formed by the loop forming means when the jaws are being closed with the brake disengaged and to allow shortening of the loop when the jaws are being opened with the brake engaged by withdrawal of the web due to the gravity of material filled into the bag formed, the filling bag being discharged from the guiDe housing at the lower end thereof.
Claim 2
Dependent Claim
253 words
Apparatus for forming and filling bags of heat sealable packaging material supplied as at least one web comprising means for forming a loop of the web; a guide housing enclosing the web over a substantially vertical length thereof in order to shape the web into a tube and forming side openings to expose marginal portions of the length of the web enclosed by the guide housing; swingers mounted on either sides of the web of packaging material when shaped into a tube in the guide housing; first heat sealing jaws for longitudinal sealing of the web at the exposed marginal portions thereof; second heat sealing jaws for transverse sealing of portions of the web projecting from the guide housing at the lower end thereof; said first and second heat sealing means being supported by the swingers; driving means for pivoting the swingers to move the sealing means supported thereby between opened and closed positions; a brake for the web of packaging material; operating means for engaging and disengaging the brake; means operatively interconnecting the swinger driving means, the brake operating means, and the loop forming means to lengthen the loop formed by the loop forming means when the jaws are being closed with the brake disengaged and to allow shortening of the loop when the jaws are being opened with the brake engaged by withdrawal of the web due to the gravity of material filled into the bag formed, the filling bag being discharged from the guiDe housing at the lower end thereof.
Claim 3
Dependent Claim
30 words
Apparatus as claimed in claim 1, further comprising means for cutting the web of packaging material, the transverse sealing jaws being provided partly above and partly below the cutting means.
Claim 4
Dependent Claim
25 words
Apparatus as claimed in claim 1, further comprising rotatable eccentric means and driving means therefor for actuating the heat sealing jaws to a closed position.
Claim 5
Dependent Claim
34 words
Apparatus as claimed in claim 3, wherein the excentric means are adapted to actuate also the brake for the web in order to keep the brake engaged when the heat sealing jaws are open.
Claim 6
Dependent Claim
61 words
Apparatus as claimed in claim 4, further comprising a time circuit for controlling the driving means of said excentric means in order to stop the movement of the excentric means during a predetermined time interval with the heat sealing jaws closed and for energizing the heat sealing jaws during a predetermined short time interval which falls during the first-mentioned time interval.
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) | 1976-10-01 | 1977-04-02 | 1977-10-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-01 | 1981-04-02 | 1981-10-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-01 | 1985-04-02 | 1985-10-02 | $7700.00 | Window Closed / Lapsed |