US4164170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making bags
Assignee: Rimbo Tekniska Fabrik Rimpac AB
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Filing: 1978-02-16
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Granted: 1979-08-14
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Expires: 1998-02-16
Abstract
Abstract There is provided a method of manufacturing a string of bags from a hose-like blank. The blank is cut along a wave-shape line substantially centrally between two opposed long edges of the blank, to form two blank-halves. Welds are made adjacent selected wave-tops and wave-bottoms of the wave-shape line to form bag handles, and further welds are made perpendicularly to said wave-shape line at selected distances apart to form said string of bags. Separation lines are made adjacent said further welds to bundle a bag to be separated from the string of bags thus formed.
Inventors
- 👤 Kent A. R. Nordin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:32
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/14; B31B70/20; B31B2155/00; B31B2155/002; B31B2160/00; B31B2160/10; B31B70/16; B31B70/18; B31B70/74; B31B70/86; B31B70/872
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
148 words
A method of making a string of bags from a blank comprising two layers of material joined together along at least three edges thereof, said method comprising the steps of cutting the layers of material along a line of wave-shape extending parallel to a pair of opposed edges, substantially centrally therebetween, the wave-tops and wave-bottoms of said wave-shape being uniformly spaced apart; displacing the thus obtained blank halves axially relative to one another in a manner such that a wave-bottom coincides with an adjacent wave-top to form an opening of regular geometric shape; welding the material along a line extending centrally between adjacent openings to form bag handles; welding the material along further lines extending perpendicularly to said firstmentioned line and being uniformly spaced apart by a distance equal to the desired width of the bag; and providing separation lines adjacent to and parallel with said further lines.
Claim 2
Independent Claim
148 words
A method of making a string of bags from a blank comprising two layers of material joined together along at least three edges thereof, said method comprising the steps of cutting the layers of material along a line of wave-shape extending parallel to a pair of opposed edges, substantially centrally therebetween, the wave-tops and wave-bottoms of said wave-shape being uniformly spaced apart; displacing the thus obtained blank halves axially relative to one another in a manner such that a wave-bottom coincides with an adjacent wave-top to form an opening of regular geometric shape; welding the material along a line extending centrally between adjacent openings to form bag handles; welding the material along further lines extending perpendicularly to said firstmentioned line and being uniformly spaced apart by a distance equal to the desired width of the bag; and providing separation lines adjacent to and parallel with said further lines.
Claim 3
Dependent Claim
15 words
A method according to claim 1, wherein the wave-shape is sinusoidal to provide circular openings.
Claim 4
Dependent Claim
22 words
A method according to claim 1, wherein the wave-shape is such as to provide openings having the shape of a regular hexagon.
Claim 5
Dependent Claim
27 words
A method according to claim 1, wherein the separation lines are formed by perforating the bag material along lines extending parallel and adjacent to said further lines.
Claim 6
Dependent Claim
27 words
A method according to claim 1, wherein the width of the material seen at right angles to the wave-shaped line is twice the length of a bag.
Claim 7
Dependent Claim
19 words
A method according to claim 1, wherein said further lines terminate at a given distance from said wave-shaped line.
Claim 8
Independent Claim
180 words
A method of making a string of bags from a blank comprising two layers of material placed one upon the other and joined, as by welding, together along at least two edges thereof to form a hose, said method comprising the steps of cutting the blank along a line of wave-shape extending parallel to a pair of opposed edges, centrally therebetween, the wave-tops and wave-bottoms of said wave-shaped line being uniformly spaced apart; welding each of the blank halves thus formed along a first line between mutually adjacent wave-bottoms and a second line between mutually adjacent wave-tops, said first line being on one side of the line of wave-shape and adjacent thereto and said second line being on the other side of said line of wave-shape and adjacent thereto to form the handles of the bags; welding the material along further lines extending perpendicularly to said first and second line and being uniformly spaced apart by a distance equal to the desired width of the bag; and by providing separation lines adjacent to and parallel with the aforementioned further lines.
Claim 9
Independent Claim
180 words
A method of making a string of bags from a blank comprising two layers of material placed one upon the other and joined, as by welding, together along at least two edges thereof to form a hose, said method comprising the steps of cutting the blank along a line of wave-shape extending parallel to a pair of opposed edges, centrally therebetween, the wave-tops and wave-bottoms of said wave-shaped line being uniformly spaced apart; welding each of the blank halves thus formed along a first line between mutually adjacent wave-bottoms and a second line between mutually adjacent wave-tops, said first line being on one side of the line of wave-shape and adjacent thereto and said second line being on the other side of said line of wave-shape and adjacent thereto to form the handles of the bags; welding the material along further lines extending perpendicularly to said first and second line and being uniformly spaced apart by a distance equal to the desired width of the bag; and by providing separation lines adjacent to and parallel with the aforementioned further lines.
Claim 10
Dependent Claim
27 words
A method according to claim 7, wherein the separation lines are formed by perforating the bag material along lines extending parallel and adjacent to said further lines.
Claim 11
Dependent Claim
27 words
A method according to claim 7, wherein the width of the material seen at right angles to the wave-shaped line is twice the length of a bag.
Claim 12
Dependent Claim
19 words
A method according to claim 7, wherein said further lines terminate at a given distance from said wave-shaped line.
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) | 1982-08-13 | 1983-02-12 | 1983-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-08-13 | 1987-02-12 | 1987-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-08-13 | 1991-02-12 | 1991-08-14 | $7700.00 | Window Closed / Lapsed |