GB1275399A - Improvements in or relating to plastics sacks - Google Patents
Improvements in or relating to plastics sacksInfo
- Publication number
- GB1275399A GB1275399A GB837170A GB837170A GB1275399A GB 1275399 A GB1275399 A GB 1275399A GB 837170 A GB837170 A GB 837170A GB 837170 A GB837170 A GB 837170A GB 1275399 A GB1275399 A GB 1275399A
- Authority
- GB
- United Kingdom
- Prior art keywords
- seals
- heat
- sack
- extending
- seal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
- B65D31/10—Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Making Paper Articles (AREA)
Abstract
1275399 Plastics sacks REED INTERNATIONAL Ltd 19 April 1971 [20 Feb 1970] 8371/70 Heading B8K The bottom of a side gussetted plastics sack is closed by means of at least one heat seal 5 extending across each four-layer region 3 formed by the gussets, at least one heat seal 4 extending across the two-layer region 1 and spaced from the heat seals 5 at 6 and a heat seal 7 disposed outwardly of the heat seals 4 and 5 and extending across the width of the sack. The heat seals 5 are applied at a greater temperature and/or pressure and/or for a greater length of time than the heat seals 4 to form the seals of substantially equal strengths. The seals 4 and 5 may be colinear, as shown, or may be linear or curved and inclined with respect to each other. The sack is formed from a gusset-folded tube which is flattened by heated rollers, heat sealed and cut as it passes over a table. The heated sealing elements may all be contained in one head, or the seals 4 and 5 may be formed by one head and the seal 7 by another head at a later stage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB837170A GB1275399A (en) | 1970-02-20 | 1970-02-20 | Improvements in or relating to plastics sacks |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB837170A GB1275399A (en) | 1970-02-20 | 1970-02-20 | Improvements in or relating to plastics sacks |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1275399A true GB1275399A (en) | 1972-05-24 |
Family
ID=9851257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB837170A Expired GB1275399A (en) | 1970-02-20 | 1970-02-20 | Improvements in or relating to plastics sacks |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1275399A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4571235A (en) * | 1984-05-02 | 1986-02-18 | Mobil Oil Corporation | Methods for preparing flat-bottom thermoplastic sack and systems therefore |
| FR2587935A1 (en) * | 1985-09-30 | 1987-04-03 | Cantenot Francois | Process for manufacturing bellows bags from a complex film consisting of two elementary laminated films made from different plastic materials using ultrasound |
| EP0256791A2 (en) * | 1986-08-18 | 1988-02-24 | Nabisco Brands, Inc. | Package for microwaveable popcorn, method for production of the package, and apparatus for sealing the package |
| US4764030A (en) * | 1986-03-03 | 1988-08-16 | Basic Packaging Systems, Inc. | Part bottom seal of chain of gusseted bags and machine therefor |
| US4816104A (en) * | 1984-05-02 | 1989-03-28 | Mobil Oil Corporation | Methods and systems for preparing flat-bottom thermoplastic sack |
| US5149201A (en) * | 1984-05-02 | 1992-09-22 | Benoit Gordon L | Angle sealed bottom grocery sack |
| US5209573A (en) * | 1991-06-17 | 1993-05-11 | Mobil Oil Corporation | Trash can liner |
| US5219220A (en) * | 1992-05-04 | 1993-06-15 | Mobil Oil Corporation | Four-film diagonal gusset seals for bags |
| US6059707A (en) | 1998-03-27 | 2000-05-09 | Tenneco Packaging Inc. | Easy to open handle bag and method of making the same |
-
1970
- 1970-02-20 GB GB837170A patent/GB1275399A/en not_active Expired
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4571235A (en) * | 1984-05-02 | 1986-02-18 | Mobil Oil Corporation | Methods for preparing flat-bottom thermoplastic sack and systems therefore |
| US4816104A (en) * | 1984-05-02 | 1989-03-28 | Mobil Oil Corporation | Methods and systems for preparing flat-bottom thermoplastic sack |
| US5149201A (en) * | 1984-05-02 | 1992-09-22 | Benoit Gordon L | Angle sealed bottom grocery sack |
| FR2587935A1 (en) * | 1985-09-30 | 1987-04-03 | Cantenot Francois | Process for manufacturing bellows bags from a complex film consisting of two elementary laminated films made from different plastic materials using ultrasound |
| US4764030A (en) * | 1986-03-03 | 1988-08-16 | Basic Packaging Systems, Inc. | Part bottom seal of chain of gusseted bags and machine therefor |
| EP0256791A2 (en) * | 1986-08-18 | 1988-02-24 | Nabisco Brands, Inc. | Package for microwaveable popcorn, method for production of the package, and apparatus for sealing the package |
| EP0256791A3 (en) * | 1986-08-18 | 1989-11-29 | Nabisco Brands, Inc. | Package for microwaveable popcorn, method for production of the package, and apparatus for sealing the package |
| US5209573A (en) * | 1991-06-17 | 1993-05-11 | Mobil Oil Corporation | Trash can liner |
| US5219220A (en) * | 1992-05-04 | 1993-06-15 | Mobil Oil Corporation | Four-film diagonal gusset seals for bags |
| US6059707A (en) | 1998-03-27 | 2000-05-09 | Tenneco Packaging Inc. | Easy to open handle bag and method of making the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PLNP | Patent lapsed through nonpayment of renewal fees |