US3707172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic apparatus for packaging powdered material with uniform bag weight and with dust-free operation
Assignee: Individual
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Filing: 1971-01-25
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Granted: 1972-12-26
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Expires: 1991-01-25
Abstract
Abstract An automatic packaging apparatus for powdered material comprising a hopper for containing such material, a chamber disposed beneath said hopper and a housing arranged beneath the bottom of said chamber. Air inlet means are provided for admitting air into the chamber and the housing for fluidizing the material delivered thereto. The housing is provided with clog inhibiting means for urging the fluidized material through and out of said housing. Flow control means is connected to feed pipe means for controlling the rate of flow of the material through said feed pipe means, said filling means is associated with the flow control means for discharging the material into a bag, the filling means being provided with a flexible sleeve for assisting smooth flow of the material. Automatic weighing means is operatively connected to the flow control means to selectively regulate material flow according to bag weight whereby a plurality of bags may be filled to a uniform weight, and a bag seat means is arranged independent of the weighing means for urging the delivery of the bag from the apparatus. The dust in said chamber and at said filling means is recirculated back into the hopper.
Inventors
- 👤 Kaisuji Obara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:11
CPC Classifications
B; B65; B65B; B65B1/00; B65B1/30; B65B1/32; B65B1/04; B65B1/16
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
261 words
An automatic packaging apparatus for powdered material, said apparatus comprising a hopper for containing such material, a chamber disposed beneath said hopper, said chamber being provided in its upper portion with an air exhaust outlet for discharging air therefrom after packaging has been finished and at its lower portion with air inlet means for blowing air into said chamber to fluidize said material moving therethrough, a housing arranged beneath the bottom of said chamber, said housing being provided with a second air inlet means for admitting air into said housing for fluidizing the material delivered thereto, said housing being provided with clog inhibiting means for urging the fluidized material through and out of said housing, feed pipe means connected to and communicating with said housing for receiving material moved by said air supply pipe, flow control means connected to said feed pipe means for controlling the rate of flow of the material through said feed pipe means, filling means associated with said flow control means for discharging the material into a bag, said filling means being provided with a flexible sleeve for assisting smooth flow of the material, automatic weighing means operatively connected to said flow control means to selectively regulate material flow according to bag weight whereby a plurality of bags may be filled to a uniform weight, a bag seat means arranged independent of said weighing means for urging the delivery of the bag from the apparatus, and means for feeding dust in said chamber and at said filling means back into said hopper for recirculation of said dust.
Claim 2
Dependent Claim
261 words
An automatic packaging apparatus for powdered material, said apparatus comprising a hopper for containing such material, a chamber disposed beneath said hopper, said chamber being provided in its upper portion with an air exhaust outlet for discharging air therefrom after packaging has been finished and at its lower portion with air inlet means for blowing air into said chamber to fluidize said material moving therethrough, a housing arranged beneath the bottom of said chamber, said housing being provided with a second air inlet means for admitting air into said housing for fluidizing the material delivered thereto, said housing being provided with clog inhibiting means for urging the fluidized material through and out of said housing, feed pipe means connected to and communicating with said housing for receiving material moved by said air supply pipe, flow control means connected to said feed pipe means for controlling the rate of flow of the material through said feed pipe means, filling means associated with said flow control means for discharging the material into a bag, said filling means being provided with a flexible sleeve for assisting smooth flow of the material, automatic weighing means operatively connected to said flow control means to selectively regulate material flow according to bag weight whereby a plurality of bags may be filled to a uniform weight, a bag seat means arranged independent of said weighing means for urging the delivery of the bag from the apparatus, and means for feeding dust in said chamber and at said filling means back into said hopper for recirculation of said dust.
Claim 3
Dependent Claim
58 words
Apparatus according to claim 1 wherein each of said air inlets comprises a casing which is provided at one side with an air pervious pad and at the other side with an air supply pipe of large diameter and an air exhaust pipe of small diameter for relieving air pressure both in the chamber and in the housing.
Claim 4
Dependent Claim
23 words
Apparatus according to claim 2 wherein air inlet unit is further divided into a plurality of air inlet unit for supplying air uniformly.
Claim 5
Dependent Claim
46 words
Apparatus according to claim 1 wherein said air exhaust outlet comprises an air exhaust pipe of large diameter and a cleanout pipe of small diameter, which are connected to two flexible coupling pipes of different diameters which can be pinched alternately by a flow cut-off arrangement.
Claim 6
Dependent Claim
50 words
Apparatus according to claim 1 wherein the clog inhibiting means comprises a main shaft possessing a center spiral bar extending into a control pipe of small diameter and opposite stirring rods and a solenoid arranged at one outer side of the housing to rotate said main shaft in about 40*.
Claim 7
Dependent Claim
50 words
Apparatus according to claim 5 wherein the clog inhibiting means comprises a flexible diaphragm having a center hole and arranged in an entrance of the control pipe of small diameter, the spiral bar being reciprocated through said center hole for urging the fluidized material through and out of the housing.
Claim 8
Dependent Claim
43 words
Apparatus according to claim 1 wherein the clog inhibiting means comprises a flexible bracket orifice possessing two symmetrically inclined members and one vertical member with a center aperture of expansible material and arranged in an entrance of the control pipe of small diameter.
Claim 9
Dependent Claim
65 words
Apparatus according to claim 1 wherein said flow control means comprises a control pipe of large diameter for full flow of the material to be packaged and a control pipe of small diameter for dribble flow of the material, both of said control pipes being connected to flexible coupling control pipes of different diameters which can be pinched alternately by a flow cut-off control arrangement.
Claim 10
Dependent Claim
24 words
Apparatus according to claim 5 wherein said control pipe of small diameter is provided with a detachable inner fitting having a conical flow construction.
Claim 11
Dependent Claim
78 words
Apparatus according to claim 1 wherein said filling means comprises a discharge spOut connected to said flow control means for discharging the material into a bag, an outer sleeve surrounding said discharge spout for providing an air exhaust path, the end of said outer sleeve being provided with a filtering mesh for releasing air from the bag while preventing escape of the material therefrom, and an air cleanout pipe in the outer sleeve for cleaning said filtering mesh.
Claim 12
Dependent Claim
43 words
Apparatus according to claim 10 wherein said outer sleeve is provided around a portion of its outer periphery with an expansible membrane whose interior communicates with an air supply pipe for sealing the inlet of the bag airtightly during filling of the bag.
Claim 13
Dependent Claim
68 words
Apparatus according to claim 1 wherein said bag seat means comprises two symmetrical supports, a fixed mounting having two opposite arms and slidably affixed to said supports and a bag seat to be elevated upwardly to support the bag after the packaging has been finished, said bag seat being tilted outwardly with increase of the weight of the bag thereby to deliver the bag out of the apparatus.
Claim 14
Dependent Claim
61 words
Apparatus according to claim 1 wherein said automatic weighing means comprises, a weighing mechanism including a main balancing weight somewhat lighter than a predetermined desired filled bag weight and an auxiliary weight for balancing the predetermined bag weight, detecting means operative just before the predetermined bag weight is attained, and means for temporarily stopping the auxiliary weight at a certain level.
Claim 15
Dependent Claim
65 words
Apparatus according to claim 1 wherein said dust feeding means has an upper cylindrical portion, to which dust conduit means from each air inlet and from the filling means are connected and a conical lower portion to which an air supply pipe is connected, an opening in the lower end of said lower portion being connected to a feed back conduit loading to said hopper.
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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |