US3663338A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bag machine
Assignee: FMC Corp
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Filing: 1968-09-16
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Granted: 1972-05-16
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Expires: 1988-09-16
Abstract
Abstract The bag machine of the present disclosure is of the type which can produce bags made of various thermoplastic sheet material and can be adapted to make side weld or bottom weld bags. The following description will, however, be confined to the production of side weld bags. A roll of plastic web is mounted on an unwind stand and traverses a folding board constraining the web to fold along its longitudinal median or along a line spaced from and parallel to the longitudinal median in the event it is desired to produce wicketed bags having lip with a pair of holes in which is inserted a U-shape wire called a wicket. Upstream of the folding board a gusseter is provided to produce a fold which permits greater expansion at the bottom of the bag. The folded and gusseted web thence comes under the influence of a reciprocating transversely disposed seal and cutter bar which divides the web, at longitudinally spaced intervals, to produce individual bags. The bags are then transported to a table which is provided with devices for arranging the bags into a stack.
Inventors
- 👤 Robert J Wech
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:30
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/60; B31B70/64; B31B70/645; B31B2155/00; B31B2155/001; B31B2155/0014; B31B2160/00; B31B2160/10; B31B70/26; B31B70/262; B31B70/36; B31B70/74; B31B70/92; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1052; Y10T156/1054; Y10T156/12; Y10T156/1313
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
159 words
In a bag machine of the character described means, operable while the machine is operating for increasing or decreasing the distance a thermoplastic web is indexed to thereby produce bags of a desired width, said means comprising a drive arrangement including a connecting rod having one end rotatably mounted on a pin rotatable about or alignable with the axis of an input shaft and the other end rotatably mounted on a pin fixed to a sector gear, means for adjusting the first mentioned of said pins relative to the axis of such input shaft, said adjusting means including a screw actuated translatable block, said screw provided with a metal cog wheel, and manually actuated means locatable in the orbit of said cog wheel for incrementally rotating said screw and thus moving the first mentioned of said pins relative to the axis of the input shaft, said manually actuated means carrying plastic blocks for establishing engagement with said cog wheel.
Claim 2
Dependent Claim
159 words
In a bag machine of the character described means, operable while the machine is operating for increasing or decreasing the distance a thermoplastic web is indexed to thereby produce bags of a desired width, said means comprising a drive arrangement including a connecting rod having one end rotatably mounted on a pin rotatable about or alignable with the axis of an input shaft and the other end rotatably mounted on a pin fixed to a sector gear, means for adjusting the first mentioned of said pins relative to the axis of such input shaft, said adjusting means including a screw actuated translatable block, said screw provided with a metal cog wheel, and manually actuated means locatable in the orbit of said cog wheel for incrementally rotating said screw and thus moving the first mentioned of said pins relative to the axis of the input shaft, said manually actuated means carrying plastic blocks for establishing engagement with said cog wheel.
Claim 3
Independent Claim
87 words
An apparatus for producing bags from thermoplastic sheet material comprising means for intermittently feeding the material; means, including a heated seal bar, for transversely sealing and cutting the material when the material is momentarily at rest; means, coordinated with the intermittent feeding of the material, for actuating said seal bar toward and away from the material; and means for displacing said seal bar to render it ineffective to make contact with the material when intermittent feeding thereof is interrupted while said actuation of the seal bar continues.
Claim 4
Independent Claim
87 words
An apparatus for producing bags from thermoplastic sheet material comprising means for intermittently feeding the material; means, including a heated seal bar, for transversely sealing and cutting the material when the material is momentarily at rest; means, coordinated with the intermittent feeding of the material, for actuating said seal bar toward and away from the material; and means for displacing said seal bar to render it ineffective to make contact with the material when intermittent feeding thereof is interrupted while said actuation of the seal bar continues.
Claim 5
Dependent Claim
31 words
The apparatus according to claim 2 wherein said last mentioned means is operable to render said seal bar effective to engage the material when intermittent feeding of the material is commenced.
Claim 6
Dependent Claim
63 words
The apparatus according to claim 2 wherein said seal bar actuating means comprises reciprocating drive members; a beam carrying the seal bar; means, engageable with the end of said beam; for slidably receiving respective end portions of said drive members; and fluid actuators rigidly connected to said drive members for moving said means slidably receiving the drive members away from the sheet material.
Claim 7
Dependent Claim
34 words
The apparatus according to claim 2 wherein said last mentioned means is operable to displace said seal bar when the bag producing apparatus is inactive or inactivated for more than one bag making cycle.
Claim 8
Dependent Claim
119 words
A bag machine including a bar for severing and sealing thermoplastic web material, said bar being heated and cooperable with a web supporting member to effect such severing and sealing when said bar establishes momentary pressure engagement with said supporting member, the improvement in said seal bar comprising a beam, each end of said beam slidably receiving reciprocable rods, the ends of said rods being engageable with abutment surfaces of said beam, and means rigidly mounted on said rods being operable to establish forceable engagement between the upper ends of said rods and said abutment surfaces preventing relative movement therebetween during normal operation or to slide said beam axially relative to said rods when bag machine operation is interrupted.
Claim 9
Dependent Claim
119 words
A bag machine including a bar for severing and sealing thermoplastic web material, said bar being heated and cooperable with a web supporting member to effect such severing and sealing when said bar establishes momentary pressure engagement with said supporting member, the improvement in said seal bar comprising a beam, each end of said beam slidably receiving reciprocable rods, the ends of said rods being engageable with abutment surfaces of said beam, and means rigidly mounted on said rods being operable to establish forceable engagement between the upper ends of said rods and said abutment surfaces preventing relative movement therebetween during normal operation or to slide said beam axially relative to said rods when bag machine operation is interrupted.
Claim 10
Dependent Claim
29 words
The apparatus according to claim 6 wherein said abutments are adjustable axially relative to said rods for adjusting the force applied by said bar to said web supporting member.
Claim 11
Dependent Claim
20 words
The apparatus according to claim 7 wherein means, associated with said abutment surfaces, are provided for indicating their adjusted positioN.
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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) | 1975-05-16 | 1975-11-15 | 1976-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-16 | 1979-11-15 | 1980-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-16 | 1983-11-15 | 1984-05-16 | $7700.00 | Window Closed / Lapsed |