Patent US3678812A successfully refreshed from Google Patents.
US3678812A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bag machine
Assignee: Individual
•
Filing: 1971-09-01
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Granted: 1972-07-25
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Expires: 1991-09-01
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 a lip with a pair of holes in which is inserted a U-shaped wire called a wicket. Downstream 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
2026-11-05 14:40
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/26; B31B70/36; B31B2155/00; B31B2160/00; B31B2160/10; B31B2160/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
155 words
A bag machine comprising means for supporting a supply roll of film to unwind about an axis which is parallel to the longitudinal median of such bag machine, a folding board for folding the film on or near its longitudinal median and for directing the folded film to follow a line parallel to the longitudinal median of the bag machine, said bag machine having an infeed frame adjacent said folding board, a guide frame interconnecting said film roll supporting means and said infeed frame to maintain a relationship of 90* between the longitudinal median of the bag machine and the transverse center of the film roll, and means on said film roll supporting means and on said folding board in contact with said guide frame for constraining the film roll supporting means and the folding board to maintain the 90* relationship as they are adjusted transversely relative to the longitudinal median of the bag machine.
Claim 2
Dependent Claim
155 words
A bag machine comprising means for supporting a supply roll of film to unwind about an axis which is parallel to the longitudinal median of such bag machine, a folding board for folding the film on or near its longitudinal median and for directing the folded film to follow a line parallel to the longitudinal median of the bag machine, said bag machine having an infeed frame adjacent said folding board, a guide frame interconnecting said film roll supporting means and said infeed frame to maintain a relationship of 90* between the longitudinal median of the bag machine and the transverse center of the film roll, and means on said film roll supporting means and on said folding board in contact with said guide frame for constraining the film roll supporting means and the folding board to maintain the 90* relationship as they are adjusted transversely relative to the longitudinal median of the bag machine.
Claim 3
Dependent Claim
48 words
The apparatus according to claim 1 wherein said constraining means comprises rollers on said film roll supporting means and a roller on said folding board in rolling engagement with a guide rail, said rollers being disposed to roll along the upper and side surfaces of said guide rail.
Claim 4
Independent Claim
130 words
An apparatus for maintaining a fixed relationship between a web roll supporting stand and the frame of a bag machine which produces bags from the web unwound from said roll, said web roll supporting stand mounts the web roll on a rotatable unwind shaft whose axis is parallel to the longitudinal median of said bag machine, the improvement comprising a rigid structure interconnecting the said supporting stand and said bag machine frame, means on said interconnecting frame defining a guide rail located normal to the longitudinal median of said bag making frame, and means, rigidly connected to said supporting stand and in rolling engagement with said guide rAil at longitudinally spaced points for permitting movement of said supporting stand therealong while maintaining its normal orientation relative to the bag machine.
Claim 5
Independent Claim
130 words
An apparatus for maintaining a fixed relationship between a web roll supporting stand and the frame of a bag machine which produces bags from the web unwound from said roll, said web roll supporting stand mounts the web roll on a rotatable unwind shaft whose axis is parallel to the longitudinal median of said bag machine, the improvement comprising a rigid structure interconnecting the said supporting stand and said bag machine frame, means on said interconnecting frame defining a guide rail located normal to the longitudinal median of said bag making frame, and means, rigidly connected to said supporting stand and in rolling engagement with said guide rAil at longitudinally spaced points for permitting movement of said supporting stand therealong while maintaining its normal orientation relative to the bag machine.
References Cited (Backward Citations)
US3191926A
Cited
US3269722A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-25 | 1976-01-24 | 1976-07-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-25 | 1980-01-24 | 1980-07-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-25 | 1984-01-24 | 1984-07-25 | $7700.00 | Window Closed / Lapsed |