US3760559A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and machine for packing similar articles into tubular wrappings
Assignee: Schweizerische Industrie Gesellschaft
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Filing: 1971-05-19
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Granted: 1973-09-25
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Expires: 1991-05-19
Abstract
Abstract The invention provides a method and a machine for packing similar articles into tubular wrappings in which a foil band is continuously fed into and drawn through a folding box which produces at the same time from a single band of foil two lengthwise adhering parallel tubes into which the articles are introduced while the double tube is being formed. A single transverse seam forming device produces transverse seams simultaneously in both parallel tubes between the articles therein. A cutting device separates the two parallel tubes from each other by cutting along a center seam formed by the longitudinally sealed overlapping edges of the foil band. Finally, the two longitudinally separated tubes are simultaneously transversely cut along the center of their transverse seams.
Inventors
- 👤 H Heinzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:06
CPC Classifications
B; B65; B65B; B65B9/00; B65B9/06
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
191 words
An article wrapping machine comprising: a folding box having an inlet end and an outlet end and shaped to gradually fold longitudinal edge portions of a moving strip inwardly towards a central longitudinal portion of said strip shaping said strip into two parallel tubular members interconnected by said central longitudinal portion of said strip with said central longitudinal portion being retained planar to the outer edges of the tubular members and with said strip edge portions being folded between the tubular members against the center of the longitudinal portion; a pair of oppositely rotating heated feed and sealing rollers disposed at the outlet end of said folding box to pull said strip therethrough and having a width less than the space between said tubular members so that one roller passes therebetween in engagement with the longitudinal edge portions and the other roller engages the central longitudinal portion to exert a forward pull on said planar central portion; an article supplying conveyor carrying articles into said tubular members in advance of said sealing rollers; and transverse seam forming means downstream from said rollers for sealingly pressing together the tubular members between articles.
Claim 2
Dependent Claim
191 words
An article wrapping machine comprising: a folding box having an inlet end and an outlet end and shaped to gradually fold longitudinal edge portions of a moving strip inwardly towards a central longitudinal portion of said strip shaping said strip into two parallel tubular members interconnected by said central longitudinal portion of said strip with said central longitudinal portion being retained planar to the outer edges of the tubular members and with said strip edge portions being folded between the tubular members against the center of the longitudinal portion; a pair of oppositely rotating heated feed and sealing rollers disposed at the outlet end of said folding box to pull said strip therethrough and having a width less than the space between said tubular members so that one roller passes therebetween in engagement with the longitudinal edge portions and the other roller engages the central longitudinal portion to exert a forward pull on said planar central portion; an article supplying conveyor carrying articles into said tubular members in advance of said sealing rollers; and transverse seam forming means downstream from said rollers for sealingly pressing together the tubular members between articles.
Claim 3
Dependent Claim
33 words
An article wrapping machine constructed in accordance with claim 1: wherein said transverse seam forming means include two oppositely driven sector rollers with heated sectors for engaging the tubular members and forming seams.
Claim 4
Dependent Claim
22 words
An article wrapping machine in accordance with claim 2: wherein the sectors include knives for cutting the tubular members into separate packages.
Claim 5
Dependent Claim
24 words
An article wrapping machine in accordance with claim 3: wherein the sectors are formed of an elastic flexible material with the knife embedded therein.
Claim 6
Dependent Claim
36 words
An article wrapping machine in accordance with claim 1: wherein means are provided for moving said tubular members apart away from said one roller so that the heat from the roller does not reach the articles.
Claim 7
Dependent Claim
33 words
An article wrapping machine in accordance with claim 1: including means for severing said central longitudinal portion to separate the tubular members between said feed and sealing rollers and said seam forming means.
Claim 8
Dependent Claim
37 words
An article wrapping machine in accordance with claim 1: and including a second pair of oppositely rotating heated feed and sealing rollers positioned downstream of the first pair relative to the direction of movement of the strip.
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) | 1976-09-24 | 1977-03-26 | 1977-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-24 | 1981-03-26 | 1981-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-24 | 1985-03-26 | 1985-09-25 | $7700.00 | Window Closed / Lapsed |