Patent US3753829A successfully refreshed from Google Patents.
US3753829A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic bag fabricating, dispensing and sealing unit
Assignee: Individual
•
Filing: 1971-12-06
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Granted: 1973-08-21
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Expires: 1991-12-06
Abstract
Abstract A plastic bag fabricating, dispensing and sealing unit includes a housing formed with a compartment and closed with a hinged lid that receives a cartridge containing a roll of double-layered folded plastic film open at one side. A wire mounted on the housing extends along an insulating strip. A circuit to heat the wire is energized by closing and pressing the lid against the housing. An insulating strip on the lid presses the plastic film against the heated wire, thereby severing and sealing and layers of plastic film to form a bag. After filling the bag, the remaining opening therein can be sealed by inserting it between the housing and lid and closing and pressing the lid against the housing.
Inventors
- 👤 M Freeman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:59
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/80; B29C66/84; B29C66/861; B29C65/00; B29C65/02; B29C65/18; B29C65/22; B29C65/221; B29C65/222; B29C65/228; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/81; B29C66/818; B29C66/8187; B29C66/81871; B29C66/83; B29C66/832; B29C66/8324; B29C66/851; B29C66/8511; B29C65/229; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/4312; B29C66/43121; B29C66/8182; B29C66/81821; B31; B31B; B31B2247/00; Y; Y10; Y10S; Y10S242/00; Y10S242/909; Y10T; Y10T156/00; Y10T156/12; Y10T156/1313
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
263 words
A plastic bag fabricating, dispensing and sealing unit comprising a housing adapted for portability and use in a home environment, a first insulating strip on the housing, a wire adapted to be heated by the flow of electrical current therethrough mounted on the first insulating strip, means holding the wire taut, a lid for the housing, hinge means between the lid and the housing, a second insulating strip on the lid and positioned to overlie the first strip and wire when the lid is closed, at least one of the first and second insulating strips being resilient, electrical circuit means for heating the wire adapted to be connected to a household outlet, a switch normally interrupting the electric circuit means, means associated with the switch and the lid to close the switch and energize the wire when the lid is closed and then pressed against the housing to compress the resilient insulating strip against the other insulating strip with the energized and heated wire in between the two strips, a compartment in the housing, a cartridge sized to fit in the compartment, first retaining means secured to said housing and adapted to engage and releasably hold the cartridge in the compartment, said cartridge being adapted to contain a roll of double-layered plastic film open at one side in the cartridge, a slot in the cartridge for withdrawing the film therefrom to a position overlying the wire, so that closing the lid and pressing it against the housing will heat the wire and seal and sever the plastic film to form a plastic bag.
Claim 2
Dependent Claim
263 words
A plastic bag fabricating, dispensing and sealing unit comprising a housing adapted for portability and use in a home environment, a first insulating strip on the housing, a wire adapted to be heated by the flow of electrical current therethrough mounted on the first insulating strip, means holding the wire taut, a lid for the housing, hinge means between the lid and the housing, a second insulating strip on the lid and positioned to overlie the first strip and wire when the lid is closed, at least one of the first and second insulating strips being resilient, electrical circuit means for heating the wire adapted to be connected to a household outlet, a switch normally interrupting the electric circuit means, means associated with the switch and the lid to close the switch and energize the wire when the lid is closed and then pressed against the housing to compress the resilient insulating strip against the other insulating strip with the energized and heated wire in between the two strips, a compartment in the housing, a cartridge sized to fit in the compartment, first retaining means secured to said housing and adapted to engage and releasably hold the cartridge in the compartment, said cartridge being adapted to contain a roll of double-layered plastic film open at one side in the cartridge, a slot in the cartridge for withdrawing the film therefrom to a position overlying the wire, so that closing the lid and pressing it against the housing will heat the wire and seal and sever the plastic film to form a plastic bag.
Claim 3
Dependent Claim
43 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 1, in which is provided switching means interrupting the electric circuit when the compartment is empty, and the switching means being closed by the insertion of a cartridge into the compartment.
Claim 4
Dependent Claim
39 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 2, wherein the switching means includes an actuator in the compartment, and the cartridge when inserted into the compartment engages the actuator to close the switching means.
Claim 5
Dependent Claim
26 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 1, in which a pair of posts are provided to hold the wire taut.
Claim 6
Dependent Claim
44 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 4, in which the wire has mounting rings at each end, so that the wire can be mounted on the first strip by placing one of the mounting rings on each post.
Claim 7
Dependent Claim
57 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 1, wherein the means associated with the switch and lid includes an arm on the switch and an actuating rod on the lid, the rod engaging and actuating the switch arm to close the switch when the lid is closed and pressed against the housing.
Claim 8
Dependent Claim
26 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 1, in which indicating means are energized in response to energization of the wire.
Claim 9
Dependent Claim
21 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 7, wherein the indicating means comprises a pilot light.
Claim 10
Dependent Claim
45 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 7, in which a transformer is included in the electric circuit, and loosely clamped core pieces in the transformer that buzz when the electric circuit and wire are energized comprise the indicating means.
Claim 11
Dependent Claim
69 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 1, in which the cartridge is formed by two end walls and four side walls, mounting means on the inner sides of the end walls for rotatably supporting the roll of plastic film, and second retaining means on the cartridge cooperating with the first retaining means to accurately position and releasably hold the cartridge in the compartment.
Claim 12
Dependent Claim
55 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 10, in which the first retaining means comprises flexible hooks extending from the floor of the housing compartment, and the second retaining means comprises protrusions cooperating with the flexible hooks to snap the cartridge into position and releasably hold it in the compartment.
Claim 13
Dependent Claim
37 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 11, in which slots are provided in the cartridge, and the flexible hooks extend through the slots to accurately position the cartridge in the compartment.
Claim 14
Dependent Claim
35 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 10, in which indexing means are included in the roll mounting means to facilitate measurement of the plastic film withdrawn from the cartridge.
Claim 15
Dependent Claim
64 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 1, in which the cartridge is formed by two end walls and four side walls, mounting means on the inner sides of the end walls for rotatably supporting the roll of plastic film, and indexing means included in the mounting means to facilitate measurement of the plastic film withdrawn from the cartridge.
Claim 16
Dependent Claim
71 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 14, wherein the mounting means includes annular flanges on the inner sides of the end walls, a core member around which plastic film is wound to form the roll, and the indexing means comprises indentations on one of the annular flange and the core member and detent means on the other of the annular flange and the core member.
Claim 17
Dependent Claim
50 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 1, wherein the hinge means is arranged to provide a slot between the lid and the housing in all positions of the lid to permit plastic film to extend through the slot to facilitate sealing of plastic bags.
Claim 18
Dependent Claim
133 words
A plastic bag fabricating, dispensing and sealing unit in accordance with claim 4, in which one of the posts is movable laterally inwardly and outwardly of the housing and is resiliently urged outwardly of the housing, and a limit switch operatively associated with the movable post, the limit switch being in the electric circuit and interrupting the circuit when open, the limit switch being open in the absence of the wire and being activated and closed by inward movement of the movable post when the wire is mounted on the housing, heating of the wire to a predetermined temperature resulting in its expansion to permit the movable post to move outwardly and open the limit switch, the limit switch being reclosed as the wire cools and contracts and the movable post moves inwardly.
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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) | 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 |