US3552278A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for making interconnected bags having closure flaps and bottom gussets
Assignee: Lion Packaging Products Co Inc
•
Filing: 1969-01-23
•
Granted: 1971-01-05
•
Expires: 1989-01-23
Abstract
Abstract Continuous web of heat-sealable material having J-shaped crosssectional shape advanced over a bar having an angular slot. Lip of wider ply of the material guided through slot to fold lip back against outer face of wider ply. As material passes over outer faces of two spaced-apart support plates, an intermediate plate pushes folded edge into region between the support plates to form a gusset. Material then provided with pairs of closely spaced seal lines, and line of perforations between each pair of seal lines.
Inventors
- 👤 William Guenther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 11:22
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/002; B31; B31B; B31B2155/00; B31B2155/001; B31B2155/0014; B31B70/00; B31B70/74; B31B70/92; B31B70/94; B31B70/946
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
A method of making a series of interconnected but separable bags comprising the steps of providing a continuous web of heat sealable sheet material folded along an offcenter longitudinal line to define two superposed plies one of which is wider then the other, the wider ply having a lip extending beyond the free edge of the narrower ply, advancing the web longitudinally, continuously folding said lip away from said narrower ply and against the outer face of said wider ply to form a three ply region along one longitudinal edge of the web, continuously introducing longitudinal portions adjacent to said offcenter fold line into the region between said plies to form a four ply portion along the other longitudinal edge of the web, intermittently heat sealing together all of said web plies along pair of spaced-apart transverse lines, and partially severing all of said plies along a line located between each pair of seal lines.
Claim 2
Independent Claim
155 words
A method of making a series of interconnected but separable bags comprising the steps of providing a continuous web of heat sealable sheet material folded along an offcenter longitudinal line to define two superposed plies one of which is wider then the other, the wider ply having a lip extending beyond the free edge of the narrower ply, advancing the web longitudinally, continuously folding said lip away from said narrower ply and against the outer face of said wider ply to form a three ply region along one longitudinal edge of the web, continuously introducing longitudinal portions adjacent to said offcenter fold line into the region between said plies to form a four ply portion along the other longitudinal edge of the web, intermittently heat sealing together all of said web plies along pair of spaced-apart transverse lines, and partially severing all of said plies along a line located between each pair of seal lines.
Claim 3
Dependent Claim
21 words
A method as defined in claim 1 including the final step of rolling up said interconnected bags on to a core.
Claim 4
Dependent Claim
197 words
Apparatus for producing a series of interconnected but separable bags comprising means for longitudinally advancing a continuous web of heat sealable sheet material folded along an offcenter longitudinal line to define two superposed plies one of which is wider than the other, the wider ply having a lip extending beyond the free edge of the narrower ply, a bar over which said web is drawn with the wider ply contacting the bar, said bar having a slot arranged at an acute angle to the web as it moves over the bar, said slot accommodating the lip of the web and serving to turn it back toward the outer face of the wider web ply to form a flap, a pair of spaced-apart support plates, each ply sliding over the outer face of one of said plates, an intermediate plate between said support plates for pushing a central region of the web into the space between the support plates to form a gusset, a heat sealer for intermittently applying to the moving web two spaced-apart seal lines transverse to the direction of web advancement, and a knife for partially severing the web between each pair of seal lines.
Claim 5
Dependent Claim
197 words
Apparatus for producing a series of interconnected but separable bags comprising means for longitudinally advancing a continuous web of heat sealable sheet material folded along an offcenter longitudinal line to define two superposed plies one of which is wider than the other, the wider ply having a lip extending beyond the free edge of the narrower ply, a bar over which said web is drawn with the wider ply contacting the bar, said bar having a slot arranged at an acute angle to the web as it moves over the bar, said slot accommodating the lip of the web and serving to turn it back toward the outer face of the wider web ply to form a flap, a pair of spaced-apart support plates, each ply sliding over the outer face of one of said plates, an intermediate plate between said support plates for pushing a central region of the web into the space between the support plates to form a gusset, a heat sealer for intermittently applying to the moving web two spaced-apart seal lines transverse to the direction of web advancement, and a knife for partially severing the web between each pair of seal lines.
References Cited (Backward Citations)
US3147674A
Cited
US3194124A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |