US4567984A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic bag package
Assignee: CMD Corp
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Filing: 1984-08-17
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Granted: 1986-02-04
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Expires: 2004-08-17
Abstract
Abstract A machine for making plastic bags, such as trash or garbage bags, includes a rotary sealing drum of variable diameter, the drum including one or more sealing bars for cross-sealing a flattened plastic film tube passing through the machine. A blanket tensioning system surrounds the drum and is adjustable to compensate for different drum diameters. The sealed film passes over a chill roll after leaving the drum-blanket assembly and is drawn over folding boards by pull rolls. The sealed and folded film is then perforated by a fly knife and is preferably also cut on the sides to produce a connected series of bags which may easily be separated from one another to make the bags suitable for easy dispensing packages. A variator assembly may also be provided to insure a proper skirt length between the cut-perforation and the bag seal.
Inventors
- 👤 Peter J. Gietman, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:33
CPC Classifications
B; B65; B65D; B65D33/00; B65D33/002; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/78; B29C65/7858; B29C65/7879; B29C65/7882; B29C65/7885; B29C65/7888; B29C65/7894; B29C66/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/80; B29C66/81; B29C66/814; B29C66/8145; B29C66/81463; B29C66/81465; B29C66/83; B29C66/834; B29C66/8341; B29C66/83421; B29C66/8351; B29C66/83511; B29C66/84; B29C66/841; B29C66/8412; B29C66/851; B29C66/8511; B31; B31B; B31B70/00; B65D83/00; B65D83/08; B65D83/0847; B29C2793/00; B29C2793/009; B29C65/24; B29C65/30; B29C66/82; B29C66/822; B29C66/8223; B29L; B29L2031/00; B29L2031/712; B29L2031/7128; B31B2155/00; B31B2160/00; B31B2160/10; B31B70/02; B31B70/022; B31B70/024; Y; Y10; Y10S; Y10S206/00; Y10S206/82; Y10S206/824
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
127 words
A package of a plurality of plastic bags, each of said bags including a leading end and a trailing end, an end seal for each of said bags being provided adjacent said trailing end, a first portion of the trailing end of each bag being connected along a line to a first portion of the leading end of the next bag, and wherein a second portion of the trailing end of each bag is not connected to an adjacent second portion of the leading end of the next bag, a plurality of perforations being provided along the line where said first portion of said trailing end is connected to said first portion of said leading end, whereby said bags may be readily torn apart from one another.
Claim 2
Dependent Claim
127 words
A package of a plurality of plastic bags, each of said bags including a leading end and a trailing end, an end seal for each of said bags being provided adjacent said trailing end, a first portion of the trailing end of each bag being connected along a line to a first portion of the leading end of the next bag, and wherein a second portion of the trailing end of each bag is not connected to an adjacent second portion of the leading end of the next bag, a plurality of perforations being provided along the line where said first portion of said trailing end is connected to said first portion of said leading end, whereby said bags may be readily torn apart from one another.
Claim 3
Dependent Claim
32 words
The invention set forth in claim 1 wherein said first portions and said second portions each include a plurality of segments along the line between said trailing end and said leading end.
Claim 4
Dependent Claim
18 words
The invention set forth in claim 2 wherein said plurality of bags are folded longitudinally in said package.
Claim 5
Dependent Claim
31 words
The invention set forth in claim 3 wherein said first portions are located at the middle of said folds and segments of said second portions are located on either side thereof.
Claim 6
Dependent Claim
32 words
The invention set forth in claim 4 wherein said package further comprises a box means for containing said plurality of bags, said box means having an opening for the dispensing of bags.
Claim 7
Dependent Claim
20 words
The invention set forth in claim 5 wherein said opening is narrower than the width of said folded plastic bags.
Claim 8
Dependent Claim
14 words
The invention set forth in claim 1 wherein said plurality of bags are rolled.
Claim 9
Dependent Claim
14 words
The invention set forth in claim 3 wherein said folded plastic bags are rolled.
Claim 10
Dependent Claim
113 words
A dispenser and a roll of plastic bags contained therein which have been folded longitudinally and which include a leading edge to be removed from said dispenser and a trailing edge to be removed as the leading edge is pulled off the roll, a bottom seal for each of said bags being provided adjacent said trailing edge thereof, the middle portion of the trailing edge of each folded bag being connected along a perforated line to the leading edge of the next succeeding folded bag on the roll and the portions on either side of said middle portion being unconnected, said dispenser including an opening from which said folded bags can be dispensed.
Claim 11
Dependent Claim
113 words
A dispenser and a roll of plastic bags contained therein which have been folded longitudinally and which include a leading edge to be removed from said dispenser and a trailing edge to be removed as the leading edge is pulled off the roll, a bottom seal for each of said bags being provided adjacent said trailing edge thereof, the middle portion of the trailing edge of each folded bag being connected along a perforated line to the leading edge of the next succeeding folded bag on the roll and the portions on either side of said middle portion being unconnected, said dispenser including an opening from which said folded bags can be dispensed.
Claim 12
Dependent Claim
20 words
The invention set forth in claim 9 wherein said opening is substantially narrower than the width of said folded bags.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-03 | 1989-08-05 | 1990-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-03 | 1993-08-05 | 1994-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-03 | 1997-08-05 | 1998-02-04 | $7700.00 | Window Closed / Lapsed |