Patent US3753824A successfully refreshed from Google Patents.
US3753824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process of manufacturing carrying bags which comprise u-shaped carrying handles of plastics material sheeting
Assignee: Windmoeller and Hoelscher KG
•
Filing: 1971-03-12
•
Granted: 1973-08-21
•
Expires: 1991-03-12
Abstract
Abstract The end portions of the strip are first folded toward the center of the strip during the folding of the carrying handle. The folded strip end portions are then engaged and rotated through 90* in mutually opposite senses about respective axes, which are spaced apart by the desired distance between the center lines of the legs of the carrying handles.
Inventors
- 👤 F Bosse
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:49
CPC Classifications
B; B31; B31D; B31D1/00; B31D1/06; B65; B65D; B65D33/00; B65D33/06; B65D33/10; B65D33/105; Y; Y10; Y10S; Y10S493/00; Y10S493/916; Y10S493/926; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1051; Y10T156/1052; Y10T156/1062; Y10T156/1075
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
120 words
A process of manufacturing U-shaped carrying handles for use in manufacturing carrying bags comprising forming a strip of flexible plastic sheet material, folding the end portions of said strip toward each other and toward the center of said strip so that said end portions are equidistant from the center of said strip and lie parallel to said strip, and gripping the end portions of the folded strip and rotating said end portions in mutually opposite directions about respective axes which are spaced from the center of said strip by the desired distance between said center and the legs of said U-shaped carrying handles until said legs are parallel to each other and form the legs of said U-shaped carrying handle.
Claim 2
Dependent Claim
120 words
A process of manufacturing U-shaped carrying handles for use in manufacturing carrying bags comprising forming a strip of flexible plastic sheet material, folding the end portions of said strip toward each other and toward the center of said strip so that said end portions are equidistant from the center of said strip and lie parallel to said strip, and gripping the end portions of the folded strip and rotating said end portions in mutually opposite directions about respective axes which are spaced from the center of said strip by the desired distance between said center and the legs of said U-shaped carrying handles until said legs are parallel to each other and form the legs of said U-shaped carrying handle.
Claim 3
Dependent Claim
75 words
The process of claim 1 in which said forming and folding steps comprise forming a web of a flexible plastics sheet material having a width equal to the length of the desired strip, folding the side portions of said web toward each other and toward the center of said web until said side portions are equidistant from the center of said web and are parallel to said web and severing said strip from said web.
Claim 4
Dependent Claim
39 words
The process of claim 2 in which said strip is first incompletely severed from said web to leave small lands and then completely severed from said web shortly before the ends of said folded strip are gripped and rotated.
Claim 5
Dependent Claim
48 words
The process of claim 2 and further comprising forming an adhesive layer comprising removeable solvent on each of the side portions of said web so that they run continuously in the longitudinal direction and further comprising extracting said solvent from said adhesive layers before said strip is severed.
Claim 6
Dependent Claim
120 words
The process of claim 1 in which said forming and folding steps comprise forming a web of flexible plastics sheet material having a width which is twice the length of the desired strip, forming an adhesive layer comprising removeable solvent on each of the side portions of said web, forming an adhesive layer comprising removeable solvent in the central portion of said web which is twice the width of said adhesive layers on said side portions and whose edges are equidistant from the center of said web, extracting solvent from said adhesive layers, severing said web along a line which bisects said intermediate adhesive layer to form two indivIdual sheets and severing said strip from each of said individual sheets.
References Cited (Backward Citations)
US3034409A
Cited
US3660204A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |