US3783585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for closing filled bags
Assignee: THURME ENG CO Ltd
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Filing: 1972-09-18
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Granted: 1974-01-08
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Expires: 1992-09-18
Abstract
Abstract A machine for closing the open ends of filled bags which are conveyed through the machine by a conveyor comprises a guide for receiving the open end part of each filled bag as it is moved through the machine, a stop which is movable between a retracted position and an advanced position in which it extends into the path of the end part of the bag as this moves along the guide, a follow-up member which is moved along the guide following the bag to compress the open end part of the bag against the stop which then moves towards the retracted position as the compressed end of the bag is moved further along the guide, means for supplying a length of adhesive strip and holding it across the path of the compressed part of the bag as this moves further along the guide and means for clamping the adhesive strip around the compressed end part of the bag to close the bag, the clamping means subsequently releasing the closed end of the bag to allow it to be moved by the conveyor out of the guide. Preferably the stop comprises a pair of contra-rotatable members which are pivotable between the advanced and retracted positions and these members are biassed by a spring into the advanced position and are moved to the retracted position by the pressure against them of the compressed end of the bag.
Inventors
- 👤 T Hoyland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:59
CPC Classifications
B; B65; B65B; B65B51/00; B65B51/04; B65B51/06; B65B51/065; B65B7/00; B65B7/02; Y; Y10; Y10T; Y10T156/00; Y10T156/12; Y10T156/1317; Y10T156/1322; Y10T156/1339
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
231 words
A machine for closing the open ends of filled bags, said machine comprising guide means for receiving and guiding the open end part of said filled bag as said bag is moved through said machine, a stop, means mounting said stop adjacent said guide means for movement between a retracted position and an advanced position in which said stop extends into the path of said open end part of said bag as said open end part moves along said guide means, a follow-up member which is movable longitudinally of said guide means following said open end part of said bag to compress said open end part against said stop, said stop being moved from said advanced position to said retracted position as said compressed end part of said bag is moved further along said guide means, means for supplying a length of adhesive strip, means for holding said length of adhesive strip in a position extending across the path of said compressed end part of said bag as said compressed end part moves further along said guide means after engagement with said stop and means for clamping said length of adhesive strip around said compressed end part of said bag to close said bag, said clamping means being operable to subsequently release said end part of said bag to allow said end part to be moved out of said guide means.
Claim 2
Dependent Claim
231 words
A machine for closing the open ends of filled bags, said machine comprising guide means for receiving and guiding the open end part of said filled bag as said bag is moved through said machine, a stop, means mounting said stop adjacent said guide means for movement between a retracted position and an advanced position in which said stop extends into the path of said open end part of said bag as said open end part moves along said guide means, a follow-up member which is movable longitudinally of said guide means following said open end part of said bag to compress said open end part against said stop, said stop being moved from said advanced position to said retracted position as said compressed end part of said bag is moved further along said guide means, means for supplying a length of adhesive strip, means for holding said length of adhesive strip in a position extending across the path of said compressed end part of said bag as said compressed end part moves further along said guide means after engagement with said stop and means for clamping said length of adhesive strip around said compressed end part of said bag to close said bag, said clamping means being operable to subsequently release said end part of said bag to allow said end part to be moved out of said guide means.
Claim 3
Dependent Claim
95 words
A machine as claimed in claim 1, wherein said stop is carried by said mounting means for pivotal movement between said advanced position and said retracted position and further comprising means biassing said stop into said advanced position, said stop being movable by said compressed end of said bag from said advanced position to said retracted position and said clamping means being operable to clamp said length of adhesive strip around said compressed end of said bag during the movement by said compressed end of said stop from said advanced position to said retracted position.
Claim 4
Dependent Claim
69 words
A machine as claimed in claim 2, wherein said stop comprises a pair of contra-rotatable members, said member including means defining cooperating faces which are operable when said members rotate from said advanced position towards said retracted position to surround said compressed end of said bag and to hold said compressed end compressed until said length of adhesive strip is clamped around said compressed end by said clamping means.
Claim 5
Dependent Claim
114 words
A machine as claimed in claim 3 wherein each of said contra-rotatable members comprises a star-shaped wheel including a series of indents around the periphery thereof, said indents including means defining edge faces which form said cooperating faces, and said biassing means being operative to align a pair of said indents one on each of said wheels in said advanced position, said compressed end part of said bag being subsequently released from said indents as said wheels are turned by said compressed end to bring said indents to said retracted position, and a further pair of said indents moving into said advanced position as said first mentioned pair of indents reach said retracted position.
Claim 6
Dependent Claim
148 words
A machine as claimed in claim 1, including means for supplying adhesive strip from a roll thereof, and cutter means for severing said length of adhesive strip from said roll thereof, said means for supplying said adhesive strip comprising a gripper reciprocable to and fro transversely of said guide means and a pair of feed rolls for said adhesive strip, said gripper being operable to grip a free end of said strip and draw said length of adhesive stRip into a position transversely of said guide means across the path of said compressed end part of said bag, said length of adhesive strip being held in said position between said gripper means and said feed rolls, and said cutter means being operative to sever said length of adhesive strip from said roll when said compressed end part of said bag has come into contact with said adhesive strip.
Claim 7
Dependent Claim
30 words
A machine as claimed in claim 5, further comprising means for feeding lengths of non-adhesive strip onto end parts of said length of adhesive strip on an adhesive face thereof.
Claim 8
Dependent Claim
111 words
A machine as claimed in claim 6, wherein said means for feeding lengths of non-adhesive strip includes means comprising a further pair of feed rolls for feeding said non-adhesive strip from a roll thereof and further cutter means, said further pair of feed rolls and said further cutter means being operative to supply and feed severed lengths of said non-adhesive strip spaced apart onto said adhesive face of said adhesive strip, said first mentioned cutter means being operable to sever both said adhesive strip and said severed lengths of non-adhesive strip simultaneously whereby each end of said length of adhesive strip has an end portion thereof covered with said non-adhesive strip.
Claim 9
Dependent Claim
30 words
A machine as claimed in claim 1, further comprising a pair of cooperating endless conveyor belts operable to move said open end part of said bag into said guide means.
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) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |