US2737859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bag making machine
Assignee: General Mills Inc
•
Filing: 1952-02-28
•
Granted: 1956-03-13
•
Expires: 1972-02-28
Abstract
No abstract record available.
Inventors
- 👤 Herbert S Allison
- 👤 Raymond I Hakomaki
- 👤 Jr Frank B Jewett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:31
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/22; B29C65/221; B29C65/222; B29C65/223; B29C65/228; B29C65/229; B29C65/74; B29C65/743; B29C65/7433; B29C65/78; B29C65/7841; B29C65/7847; B29C66/00; B29C66/40; B29C66/41; B29C66/43; B29C66/431; B29C66/4312; B29C66/80; B29C66/81; B29C66/814; B29C66/8141; B29C66/81427; B29C66/81431; B29C66/8145; B29C66/81457; B29C66/816; B29C66/8161; B29C66/818; B29C66/8182; B29C66/81821; B29C66/8187; B29C66/81871; B29C66/83; B29C66/834; B29C66/8351; B29C66/83511; B29C66/83517; B31; B31B; B31B70/00; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/81411; B29C66/81421; B29C66/81422; B31B2155/00; B31B2160/00; B31B2160/10; B31B2160/106; B31B70/02; B31B70/022; B31B70/024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
171 words
A MECHANISM FOR FORMING BAGS AND THE LIKE FROM THERMOPLASTIC TUBULAR MATERIAL WHICH COMPRISES A HOLLOW CYLINDRICAL BAG FORMING DRUM OVER WHICH A LENGTH OF THERMOPLASTIC MATERIAL IS ADVANCED, PAIRS OF SPACED ROWS OF HOLES EXTENDING AXIALLY THROUGH THE SURFACE OF THE DRUM, MEANS FOR CAUSING A PRESSURE DIFFERENTIAL BETWEEN THE INTERIOR AND EXTERIOR OF THE DRUM TO CAUSE FLOW OF AIR THROUGH THE HOLES AND HOLD THE THERMOPLASTIC MATERIAL AGAINST THE DRUM SURFACE AS IT IS CARRIED THEREON, WIRES SPACED FROM THE SURFACE OF THE CYLINDER AND EACH POSITIONED BETWEEN A PAIR OF ROWS OF HOLES AND DETACHABLY SECURED TO THE CYLINDER IN ORDER THAT SOME OF THEM MAY BE DETACHED OR THAT OTHERS MAY BE ADDED OR THAT THEY MAY BE RELOCATED AND POSITIONED BETWEEN OTHER PAIRS OF HOLES SO AS TO CHANGE THE LENGTH OF THERMOPLASTIC BAG WHICH IS CUT FROM THE MATERIAL WHEN THE WIRES ARE HEATED, AND MEANS TO ELECTRICALLY HEAT THE WIRES TO SEVER BAGS FROM THE THERMOPLASTIC MATERIAL AND TO SEAL THE SEVERED EDGES.
Claim 2
Dependent Claim
215 words
A MECHANISM FOR FORMING BAGS AND THE LIKE FROM TUBULAR THERMOPLASTIC MATERIAL COMPRISING A HOLLOW CYLINDRICAL BAG FORMING DRUM OVER WHICH A LENGTH OF TUBULAR MATERIAL IS ADVANCED, SPACED HEATED WIRES MOUNTED ON THE SURFACE OF THE DRUM TO SEVER THE TUBULAR MATERIAL INTO BAGS, HOLES IN THE SURFACE OF THE BAG FORMING DRUM, MEANS TO CAUSE A VACUUM IN THE INTERIOR OF THE DRUM TO HOLD THE BAGS AND TUBULAR MATERIAL AGAINST THE SURFACE THEREOF, MEANS FOR DIRECTING AIR OUTWARDLY THROUGH THE HOLES AT THE LOCATION WHERE THE BAGS ARE TO BE REMOVED FROM THE DRUM, A BAG REMOVING CONVEYOR POSITIONED AT THE BAG REMOVING LOCATION AND COMPRISING A HOLLOW UPPER CYLINDER CARRYING CONVEYING BELTS WHICH ARE RECESSED INTO THE SURFACE SO AS TO BE FLUSH THEREWITH, AND A COOPERATING ROLLER POSITIONED BENEATH THE FIRST ROLLER AND ALSO CARRYING SPACED CONVEYING BELTS WHICH ARE RECESSED IN SURFACE THEREOF, AND MEANS FOR HAVING OPENINGS IN THE SURFACE THEREOF, AND MEANS FOR CREATING A VACUUM IN THE INTERIOR OF SAID FIRST ROLLER TO DRAW THE BAG AGAINST THE SURFACE THEREOF, AND A TANGENTIAL AIR JET POSITIONED AT SAID BAG REMOVING LOCATION TO BLOW AGAINST THE DIRECTION OF BAG ADVANCEMENT AND DIRECT AND LEADING EDGE OF THE BAGS AWAY FROM THE DRUM AND ONTO SAID FIRST ROLLER.
References Cited (Backward Citations)
US634307A
Cited
US1496356A
Cited
US1765564A
Cited
US2125758A
Cited
US2185647A
Cited
US2444685A
Cited
US2525139A
Cited
US2577745A
Cited
US2546164A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-03-13 | 1959-09-12 | 1960-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-13 | 1963-09-12 | 1964-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-13 | 1967-09-12 | 1968-03-13 | $7700.00 | Window Closed / Lapsed |