US3687357A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Draw-cord bags
Assignee: Individual
•
Filing: 1970-04-30
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Granted: 1972-08-29
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Expires: 1990-04-30
Abstract
Abstract A method and apparatus for producing draw-cord bags wherein a folded sheet of synthetic material is fed step-wise through an apparatus comprising means for folding the open edges of the sheet back upon themselves and producing a pair of seams, means for punching apertures therein, means for threading at least one draw-cord through each seam and means for producing and applying connectors to the ends of said draw-cords to produce an annular draw-cord, further means being provided for producing welded side edges for said bags and separating same from said sheet. The invention also relates to a draw-cord bag produced by the method and apparatus.
Inventors
- 👤 Gerhard Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:46
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/16; B65D33/28; B31; B31B; B31B70/00; B31B70/74; B31B70/81; B31B70/813; B31B70/8134; B31B70/8135
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
160 words
An apparatus for the production of draw-cord bags from a weldable plastic sheet having at the opening of each bag a turned seam for the reception of at least one draw-cord, which apparatus has means for the turning of the edges of said sheet for producing said turned seam, means for the production of holes through which the draw-cord may extend, means for the introduction of the draw-cord into the seam, means for securing the seam onto the body of the bag and for the closure of the bag, as well as for the separation thereof along its longitudinal sides characterized by a device which connects parts of the drawcord by the application of connectors produced in a mold from moldable material while retaining the original position of the draw-cord in the bag, said parts being connected at each side of the bag into a closed draw-cord, said device simultaneously separating the cords of two adjacent bags from one another.
Claim 2
Independent Claim
160 words
An apparatus for the production of draw-cord bags from a weldable plastic sheet having at the opening of each bag a turned seam for the reception of at least one draw-cord, which apparatus has means for the turning of the edges of said sheet for producing said turned seam, means for the production of holes through which the draw-cord may extend, means for the introduction of the draw-cord into the seam, means for securing the seam onto the body of the bag and for the closure of the bag, as well as for the separation thereof along its longitudinal sides characterized by a device which connects parts of the drawcord by the application of connectors produced in a mold from moldable material while retaining the original position of the draw-cord in the bag, said parts being connected at each side of the bag into a closed draw-cord, said device simultaneously separating the cords of two adjacent bags from one another.
Claim 3
Dependent Claim
43 words
An apparatus according to claim 1 characterized in that, the mold has individual molds for the production of four connectors and in that the individual molds arranged cross-wise are each alike in pairs but are of different design from other pairs of molds.
Claim 4
Dependent Claim
40 words
An apparatus according to claim 2, characterized in that, the molds are arranged adjacent one another and serve for the production of connectors of two adjacent bags and in that a knife is provided between the molds, for two bags.
Claim 5
Dependent Claim
161 words
A draw-cord bag having two draw-cords arranged at a distance from one another in the seam, the half-length of which cords corresponds substantially to the width of the bag and which projects through a cut-out in the bag, characterized in that, at each side of the bag, a connector of moldable material is secured near each end of each draw-cord for connecting two parts of each draw-cord into annular draw-cords, which lie within the extension in width of the bag, one of said connectors near one end of one of said draw-cords being of a larger dimension at one side of the bag as compared to the dimension of the other of said connectors near the opposite end thereof, and one of said connectors near one end of the other of said draw-cords being of a larger dimension at the opposite side of the bag as compared to the dimension of the other of said connectors near the opposite end thereof.
Claim 6
Dependent Claim
161 words
A draw-cord bag having two draw-cords arranged at a distance from one another in the seam, the half-length of which cords corresponds substantially to the width of the bag and which projects through a cut-out in the bag, characterized in that, at each side of the bag, a connector of moldable material is secured near each end of each draw-cord for connecting two parts of each draw-cord into annular draw-cords, which lie within the extension in width of the bag, one of said connectors near one end of one of said draw-cords being of a larger dimension at one side of the bag as compared to the dimension of the other of said connectors near the opposite end thereof, and one of said connectors near one end of the other of said draw-cords being of a larger dimension at the opposite side of the bag as compared to the dimension of the other of said connectors near the opposite end thereof.
Claim 7
Independent Claim
159 words
A method for the production of draw-cord bags from a weldable plastic sheet, the opening of each bag having turned seams for the reception of a pair of annular draw-cords, comprising, turning the edges of each bag opening to provide the seam, stamping out holes in each bag for passage of the draw-cords, placing the draw-cords spaced longitudinally from one another within the turned edGes so that opposite ends of each cord project outwardly of each bag through said holes, seaming the edges of each bag together, closing the edges of the seam and the longitudinal edges of each bag and thereafter separating the bags from the sheet, forming connectors by injection molding on each of said draw-cord ends which project outwardly of each bag through said holes with adjacent pairs of said connectors for each adjacent bag being spaced from one another, and separating the cords of two adjacent bags from one another during the connector forming step.
Claim 8
Independent Claim
159 words
A method for the production of draw-cord bags from a weldable plastic sheet, the opening of each bag having turned seams for the reception of a pair of annular draw-cords, comprising, turning the edges of each bag opening to provide the seam, stamping out holes in each bag for passage of the draw-cords, placing the draw-cords spaced longitudinally from one another within the turned edGes so that opposite ends of each cord project outwardly of each bag through said holes, seaming the edges of each bag together, closing the edges of the seam and the longitudinal edges of each bag and thereafter separating the bags from the sheet, forming connectors by injection molding on each of said draw-cord ends which project outwardly of each bag through said holes with adjacent pairs of said connectors for each adjacent bag being spaced from one another, and separating the cords of two adjacent bags from one another during the connector forming step.
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) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |