Patent US3796142A successfully refreshed from Google Patents.
US3796142A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of making bags having folded bases, and bags so made
Assignee: Windmoeller and Hoelscher KG
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Filing: 1972-05-30
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Granted: 1974-03-12
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Expires: 1992-05-30
Abstract
Abstract In the manufacture of paper or plastics bags with folded bases from multi-ply flattened tube sections, the ends of the tube sections are opened by suction means applied to the outermost ply of at least one wall of the tube sections at locations where all except the innermost ply have been provided with air holes or incisions.
Inventors
- 👤 G Kuckhermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 09:07
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/26; B31B2150/00; B31B2160/00; B31B2160/10; B31B2160/106; B31B2170/00; B31B2170/20
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
78 words
A method of making bags having a folded base from multi-ply flattened tube sections of paper or the like, wherein the ends of the tube sections are opened by suction tools applied to the outermost ply of at least one wall of the tube sections and the bases are subsequently folded, all except the innermost ply of said wall being provided with air holes prior to the opening step at a location where the suction tools are applied.
Claim 2
Independent Claim
78 words
A method of making bags having a folded base from multi-ply flattened tube sections of paper or the like, wherein the ends of the tube sections are opened by suction tools applied to the outermost ply of at least one wall of the tube sections and the bases are subsequently folded, all except the innermost ply of said wall being provided with air holes prior to the opening step at a location where the suction tools are applied.
Claim 3
Dependent Claim
90 words
A method accOrding to claim 1 for making bags in which the ends of the plies of a first wall of each tube section are staggered inwardly of the tube section and the ends of the plies of a second wall of each tube section are staggered outwardly of the tube section, wherein said suction tools are applied to said first wall near the edge of the innermost ply and further suction tools are applied to the outermost ply of said first wall near the edge of the outermost ply.
Claim 4
Dependent Claim
17 words
A method according to claim 1, wherein the air holes are in the form of stellular incisions.
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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |