US4107900A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Forming and filling bags of synthetic plastics materials
Assignee: Individual
•
Filing: 1977-06-03
•
Granted: 1978-08-22
•
Expires: 1997-06-03
Abstract
Abstract Apparatus for forming and filling bags of synthetic plastics material comprising feed means for feeding a flattened tube of synthetic plastics material through the apparatus; a cutting device for cutting the tube substantially along the mid-line thereof to produce two strips of material, each of which strips is open along one edge; a tube for filling the bags, which tube is constructed to pass between the edges of each strip of material and to open into the interior of each strip; sealing means for sealing together the open edges of each strip of material to form two further tubes; and cutting and sealing means for sealing simultaneously the top and bottom of adjoining bags and for separating the bags from one another.
Inventors
- 👤 Shinjiro Izumi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 21:49
CPC Classifications
B; B65; B65B; B65B9/00; B65B9/10; B65B9/13
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
129 words
Apparatus for forming and for filling bags of a synthetic plastics material, comprising: feed means for feeding a flattened tube of synthetic plastics material along a predetermined path through said apparatus; cutting means for cutting said tube substantially along the mid-line thereof to produce two strips of material, each of which strips has two open edges along one side; a tube constructed to pass between said open edges of each strip of material and to debouch into the interior of each strip; sealing means for sealing together said open edges of each strip of material to form two further tubes; and cutting and sealing means for sealing said further tubes transversely to form simultaneously the top and bottom of adjoining bags and for separating said bags from one another.
Claim 2
Dependent Claim
129 words
Apparatus for forming and for filling bags of a synthetic plastics material, comprising: feed means for feeding a flattened tube of synthetic plastics material along a predetermined path through said apparatus; cutting means for cutting said tube substantially along the mid-line thereof to produce two strips of material, each of which strips has two open edges along one side; a tube constructed to pass between said open edges of each strip of material and to debouch into the interior of each strip; sealing means for sealing together said open edges of each strip of material to form two further tubes; and cutting and sealing means for sealing said further tubes transversely to form simultaneously the top and bottom of adjoining bags and for separating said bags from one another.
Claim 3
Dependent Claim
35 words
Apparatus according to claim 1, wherein said cutting means comprises a knife mounted on a centering device, said centering device including two arms for engaging with the inside of the edges of said flattened tube.
Claim 4
Dependent Claim
22 words
Apparatus according to claim 2, wherein one of said arms is resilient for accommodating variations in the width of said flattened tube.
Claim 5
Dependent Claim
24 words
Apparatus according to claim 1 and including a pair of angled guide rollers for aligning each strip as it passes to said sealing means.
Claim 6
Dependent Claim
40 words
Apparatus according to claim 1, wherein said sealing means comprises a pair of endless belts for receiving therebetween said open edges of each strip, and heating means for heating said belts whereby to seal said open edges of said strip.
Claim 7
Dependent Claim
17 words
Apparatus according to claim 5 and including cooling means for cooling said sealed edges of said strip.
Claim 8
Dependent Claim
26 words
Apparatus according to claim 1 and including means for supplying hot air between said open edges of said strip as said strip passes over said tube.
References Cited (Backward Citations)
US2162230A
Cited
US2616232A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-08-21 | 1982-02-20 | 1982-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-08-21 | 1986-02-20 | 1986-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-08-21 | 1990-02-20 | 1990-08-22 | $7700.00 | Window Closed / Lapsed |