Patent US3568733A successfully refreshed from Google Patents.
US3568733A
Expired / Lapsed
US
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Method and apparatus for filling bags
Assignee: Amcor Flexibles North America Inc
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Filing: 1968-07-16
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Granted: 1971-03-09
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Expires: 1988-07-16
Abstract
Abstract A bag-filling machine has a flexible sleeve extending from the supply bin to the feed hopper. The feeding action is obtained by squeezing the sleeve to force the charge of powdered material contained therein downwardly through the feed chamber and a communicating spout into a bag hung on the spout. A casing surrounds the flexible sleeve. Air under pressure is introduced into the space between the casing and the sleeve to squeeze the sleeve. In a modification, the sleeve is squeezed by rollers. When a given weight of material has been fed into the bag, a scale mechanism trips and shuts off further flow of material through the spout by means of a pinch valve behind the spout, and terminates the squeezing action.
Inventors
- 👤 Erwin M Lau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 04:58
CPC Classifications
B; B65; B65B; B65B1/00; B65B1/04; B65B1/06
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
118 words
The method of filling bags with powdered material contained in a supply bin which comprises the steps of permitting gravitational movement of material from the lower portion of said supply bin into an elongate chamber, applying a mechanical force to the material in said chamber to force said material downwardly through said elongate chamber and into a bag and at the same time relieving the material in said elongate chamber from the weight of the material in said supply bin, fluidizing said material to an extent sufficient only to lubricate the particles thereof during horizontal movement, and discontinuing the application of said mechanical force and permitting downward gravitational movement of material from said bin into said elongate chamber.
Claim 2
Independent Claim
118 words
The method of filling bags with powdered material contained in a supply bin which comprises the steps of permitting gravitational movement of material from the lower portion of said supply bin into an elongate chamber, applying a mechanical force to the material in said chamber to force said material downwardly through said elongate chamber and into a bag and at the same time relieving the material in said elongate chamber from the weight of the material in said supply bin, fluidizing said material to an extent sufficient only to lubricate the particles thereof during horizontal movement, and discontinuing the application of said mechanical force and permitting downward gravitational movement of material from said bin into said elongate chamber.
Claim 3
Independent Claim
112 words
The method of filling bags with powdered material contained in a supply bin which comprises the steps of introducing material from the lower portion of said supply bin into an elongate chamber having flexible walls, squeezing the walls of said chamber to force said material downwardly through said elongate chamber and into a bag, fluidizing said material to a slight extent at a point between said chamber and said bag, blocking the flow of material from said elongate chamber into said bag when a predetermined amount of material has been received within said bag, and discontinuing said squeezing action and permitting downward movement of material from said bin into said elongate chamber.
Claim 4
Independent Claim
112 words
The method of filling bags with powdered material contained in a supply bin which comprises the steps of introducing material from the lower portion of said supply bin into an elongate chamber having flexible walls, squeezing the walls of said chamber to force said material downwardly through said elongate chamber and into a bag, fluidizing said material to a slight extent at a point between said chamber and said bag, blocking the flow of material from said elongate chamber into said bag when a predetermined amount of material has been received within said bag, and discontinuing said squeezing action and permitting downward movement of material from said bin into said elongate chamber.
Claim 5
Dependent Claim
13 words
The method of claim 2 in which said walls are squeezed progressively downward.
Claim 6
Dependent Claim
73 words
A bag-filling machine comprising material inlet means, a feed hopper spaced below said inlet means, a bag-receiving spout communicating with said feed hopper, fluidizing means located in said feed hopper, a vertically extending flexible sleeve connecting said inlet means with the upper part of said feed hopper, and means for squeezing said sleeve to force material contained within said sleeve downwardly into and through said feed hopper and spout and into said bag.
Claim 7
Dependent Claim
73 words
A bag-filling machine comprising material inlet means, a feed hopper spaced below said inlet means, a bag-receiving spout communicating with said feed hopper, fluidizing means located in said feed hopper, a vertically extending flexible sleeve connecting said inlet means with the upper part of said feed hopper, and means for squeezing said sleeve to force material contained within said sleeve downwardly into and through said feed hopper and spout and into said bag.
Claim 8
Dependent Claim
58 words
A bag-filling machine as claimed in claim 4 in which said sleeve-squeezing means comprises a pair of oppositely disposed rollers mounted for horizontal movement between a first position in which said sleeve is substantially unsqueezed and a second position in which said rollers engage said sleeve to squeeze same, and for downward movement when in said second position.
Claim 9
Dependent Claim
35 words
A bag filling machine as claimed in claim 4 in which said sleeve-squeezing means comprises a casing surrounding said sleeve, and means for establishing air pressure in the space between the casing and said sleeve.
Claim 10
Dependent Claim
47 words
A bag-filling machine as claimed in claim 4 which includes means for terminating the operation of said squeezing means when a predetermined amount of said material has been fed into said bag, whereby a fresh charge of material may flow from said inlet means into said sleeve.
Claim 11
Dependent Claim
38 words
A bag-filling machine as claimed in claim 7 which includes means for cutting off the flow of material through said spout, and bag weight responsive means controlling the operation of said cut off means and said terminating means.
Claim 12
Dependent Claim
110 words
A bag-filling machine as claimed in claim 4 which includes a top collar plate secured to said inlet means and having an upwardly extending collar, a bottom collar plate secured to said feed hopper and having a downwardly extending collar, the upper end of said sleeve extending through said collar and being folded down over the external surface thereof, first clamping means surrounding said folded down end and clamping same to said collar, the lower end of said sleeve extending through said downwardly extending collar and being folded up over the external surface thereof, and second clamping means surrounding said folded up end portion and clamping same to said collar.
Claim 13
Dependent Claim
174 words
A bag-filling machine comprising material inlet means, a feed hopper spaced below said inlet means, a bag-receiving spout communicating with said feed hopper, a vertically extending flexible sleeve connecting said inlet means with the upper part of said feed hopper, a top collar plate secured to said inlet means and having an upwardly extending collar of oval cross section, a bottom collar plate secured to said feed hopper and having a downwardly extending collar of circular cross section, the upper end of said sleeve extending through said collar and being folded down over the external surface thereof, first clamping means surrounding said folded down end and clamping same to said collar, the lower end of said sleeve extending through said downwardly extending collar and being folded up over the external surface thereof, and second clamping means surrounding said folded up end portion and clamping same to said collar, and means for squeezing said sleeve to force material contained within said sleeve downwardly into and through said feed hopper and spout and into said bag.
Claim 14
Dependent Claim
174 words
A bag-filling machine comprising material inlet means, a feed hopper spaced below said inlet means, a bag-receiving spout communicating with said feed hopper, a vertically extending flexible sleeve connecting said inlet means with the upper part of said feed hopper, a top collar plate secured to said inlet means and having an upwardly extending collar of oval cross section, a bottom collar plate secured to said feed hopper and having a downwardly extending collar of circular cross section, the upper end of said sleeve extending through said collar and being folded down over the external surface thereof, first clamping means surrounding said folded down end and clamping same to said collar, the lower end of said sleeve extending through said downwardly extending collar and being folded up over the external surface thereof, and second clamping means surrounding said folded up end portion and clamping same to said collar, and means for squeezing said sleeve to force material contained within said sleeve downwardly into and through said feed hopper and spout and into said bag.
Claim 15
Dependent Claim
32 words
A bag-filling machine as claimed in claim 10 in which the peripheries of said collars are equal to each other, in length, said sleeve being of tubular rubber stock of uniform diameter.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |