Patent US2400804A successfully refreshed from Google Patents.
US3970503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a bag
Assignee: Ruby Net Hosoki KK
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Filing: 1974-12-27
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Granted: 1976-07-20
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Expires: 1994-12-27
Abstract
Abstract A method of manufacturing a bag from a cylindrical net-like bag blank made of synthetic fibers or synthetic resin. The method involves the steps of inserting into said bag blank a resilient plate having a length which is at least equal to the depth of the bag to be manufactured and a width which is substantially equal to the circumferential length of said bag blank in such a way that the plate is not overlapped with the bag bottom forming portion of the bag blank but is overlapped with the bag mouth forming portion of the bag blank. A molten polyethylene resin is applied as one or more filaments or strips extending widthwise of the bags to be manufactured to the opposite outer surfaces of the bag blank in the bag mouth forming portion and to at least one outer surface of the bag blank in the bag bottom forming portion, and immediately thereafter the applied molten polyethylene resin is cooled under pressure to embed the synthetic fibers or synthetic resin of the bag blank into the applied polyethylene resin and to solidify the latter.
Inventors
- 👤 Takehisa Yoshimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:42
CPC Classifications
C; C09; C09J; C09J5/00; C09J5/10; B; B31; B31B; B31B70/00; B31B70/60; B31B70/62; B31B70/626; B31B70/74; B31B70/81
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
201 words
A method of manufacturing a plurality of bags from a single cylindrical net-like bag blank consisting of synthetic fibers or synthetic resin comprising the steps of: inserting into said bag blank a plurality of resilient plates each having a length at least equal to the depth of the bags to be manufactured and a width substantially equal to the circumferential length of said bag blank in such a way that the plates are not overlapped with the related bag bottom forming portions of said bag blank, but are overlapped with the related bag mouth forming portions of said bag blank; applying a molten polyethylene resin in the form of at least one filament or strip extending widthwise of the bags to be manufactured to the opposite outer surfaces of said bag blank in said bag mouth forming portions and to at least one outer surface of said bag blank in said bag bottom forming portions; and immediately after applying said resin, cooling under pressure said applied molten polyethylene resin to embed the synthetic fibers or synthetic resin of said bag blank into said applied polyethylene resin and to solidify the latter; and severing the thus processed bag blank into individual bags.
Claim 2
Independent Claim
201 words
A method of manufacturing a plurality of bags from a single cylindrical net-like bag blank consisting of synthetic fibers or synthetic resin comprising the steps of: inserting into said bag blank a plurality of resilient plates each having a length at least equal to the depth of the bags to be manufactured and a width substantially equal to the circumferential length of said bag blank in such a way that the plates are not overlapped with the related bag bottom forming portions of said bag blank, but are overlapped with the related bag mouth forming portions of said bag blank; applying a molten polyethylene resin in the form of at least one filament or strip extending widthwise of the bags to be manufactured to the opposite outer surfaces of said bag blank in said bag mouth forming portions and to at least one outer surface of said bag blank in said bag bottom forming portions; and immediately after applying said resin, cooling under pressure said applied molten polyethylene resin to embed the synthetic fibers or synthetic resin of said bag blank into said applied polyethylene resin and to solidify the latter; and severing the thus processed bag blank into individual bags.
Claim 3
Independent Claim
186 words
A method of manufacturing a bag from a cylindrical net-like bag blank consisting of synthetic fibers or synthetic resin comprising the steps of: inserting into said bag blank a resilient plate having a length which is at least equal to the depth of the bag to be manufactured and a width which is substantiallyy equal to the circumferential length of said bag blank in such way that the plate is not overlapped with a bag bottom forming portion of said bag blank, but is overlapped with a bag mouth forming portion of said bag blank; applying a molten polyethylene resin in the form of at least one filament or strip extending widthwise of the bag to be manufactured to the opposite outer surfaces of said bag blank in said bag mouth forming portion and to at least one outer surface of said bag blank in said bag bottom forming portion; and immediately after applying said resin, cooling under pressure said applied molten polyethylene resin to embed the synthetic fibers or synthetic resin of said bag blank into said applied polyethylene resin and to solidify the latter.
Claim 4
Independent Claim
186 words
A method of manufacturing a bag from a cylindrical net-like bag blank consisting of synthetic fibers or synthetic resin comprising the steps of: inserting into said bag blank a resilient plate having a length which is at least equal to the depth of the bag to be manufactured and a width which is substantiallyy equal to the circumferential length of said bag blank in such way that the plate is not overlapped with a bag bottom forming portion of said bag blank, but is overlapped with a bag mouth forming portion of said bag blank; applying a molten polyethylene resin in the form of at least one filament or strip extending widthwise of the bag to be manufactured to the opposite outer surfaces of said bag blank in said bag mouth forming portion and to at least one outer surface of said bag blank in said bag bottom forming portion; and immediately after applying said resin, cooling under pressure said applied molten polyethylene resin to embed the synthetic fibers or synthetic resin of said bag blank into said applied polyethylene resin and to solidify the latter.
Claim 5
Dependent Claim
62 words
A method of manufacturing a bag as claimed in claim 2 wherein said molten polyethylene resin applied to the opposite outer surfaces of said bag blank as a plurality of filaments or strips extending widthwise of the bag to be manufactured is also applied to portions of said bag blank other than said bag mouth forming portion and bag bottom forming portion.
Claim 6
Dependent Claim
81 words
A method of manufacturing a bag as claimed in claim 2, wherein a label of polyethylene resin on which desired information is printed is carried by said plate at a desired position thereof with the front face of the label being faced to a surface of said plate; and said label is secured to said bag blank by means of molten polyethylene resin applied to the outer surface of said bag blank above the position of said label on said plate.
Claim 7
Dependent Claim
56 words
A method of manufacturing a bag as claimed in claim 2 wherein said plate carries thereon a tape of polyethylene film to be placed in said bag mouth forming portion of said bag blank, said tape being secured to said bag blank in said bag mouth forming portion by means of said applied molten polyethylene resin.
Claim 8
Dependent Claim
48 words
A method of manufacturing a bag as claimed in claim 5 wherein: a strap is wound around said tape of polyethylene film approximately in middle portion thereof; and the molten polyethylene resin is applied to said bag mouth forming portion of said bag blank only beside said strap.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-07-20 | 1980-01-19 | 1980-07-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-07-20 | 1984-01-19 | 1984-07-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-07-20 | 1988-01-19 | 1988-07-20 | $7700.00 | Window Closed / Lapsed |