US3581876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bag flattening conveyors
Assignee: Individual
•
Filing: 1969-07-07
•
Granted: 1971-06-01
•
Expires: 1989-07-07
Abstract
Abstract An inclined main belt conveyor having a floating belt conveyor maintained parallel thereover by means of parallel links, the floating conveyor being provided with a plurality of individually sprung press rolls which individually and successively knead the bags as they pass upwardly between the two conveyors.
Inventors
- 👤 Milroy A Keith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:31
CPC Classifications
B; B65; B65B; B65B61/00; B65B61/24; B65G; B65G37/00; B65G2812/00; B65G2812/01; B65G2812/016; B65G2812/018
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
213 words
A bag-flattening conveyor comprising: a. a main conveyor frame; b. a floating conveyor frame positioned above and in substantially parallel relation to said main conveyor frame; c. a first endless conveyor belt extending throughout the length of said main conveyor frame and a second conveyor belt extending throughout the length of said floating frame, the adjacent reaches of said belts travelling simultaneously in the same direction so as to receive, convey and flatten bags therebetween; d. a plurality of parallel spaced-apart press rolls, each provided with an axially projecting axis shaft, transversally positioned in said floating frame in contact with the back of the adjacent reach of the second belt; and e. an elongated, resilient, spring rod bent intermediate its extremities to a preformed V-shape, with two straight portions extending at an acute angle with each other, positioned between the projecting extremities of each axis shaft and said floating frame, acting to independently urge each press roll against the back of said second belt; f. means for journaling an extremity of said axis shaft at one extremity of said rod; and g. means for mounting the other extremity of said rod on said floating conveyor frame so that tension in said belt will tend to resiliently urge said straight portions toward each other.
Claim 2
Dependent Claim
213 words
A bag-flattening conveyor comprising: a. a main conveyor frame; b. a floating conveyor frame positioned above and in substantially parallel relation to said main conveyor frame; c. a first endless conveyor belt extending throughout the length of said main conveyor frame and a second conveyor belt extending throughout the length of said floating frame, the adjacent reaches of said belts travelling simultaneously in the same direction so as to receive, convey and flatten bags therebetween; d. a plurality of parallel spaced-apart press rolls, each provided with an axially projecting axis shaft, transversally positioned in said floating frame in contact with the back of the adjacent reach of the second belt; and e. an elongated, resilient, spring rod bent intermediate its extremities to a preformed V-shape, with two straight portions extending at an acute angle with each other, positioned between the projecting extremities of each axis shaft and said floating frame, acting to independently urge each press roll against the back of said second belt; f. means for journaling an extremity of said axis shaft at one extremity of said rod; and g. means for mounting the other extremity of said rod on said floating conveyor frame so that tension in said belt will tend to resiliently urge said straight portions toward each other.
Claim 3
Dependent Claim
43 words
A bag-flattening conveyor as described in claim 1 in which the means for journaling comprises: a. an integrally formed, annular bearing loop formed in said one extremity of said rod which encircles and forms a bearing for the extremity of said axis shaft.
Claim 4
Dependent Claim
40 words
A bag-flattening conveyor as described in claim 2 in which the means for mounting the other extremity of said rod comprises: a. an integral mounting hook formed on the other extremity of said rod and hookedly engaging said floating frame.
Claim 5
Dependent Claim
51 words
A bag-flattening conveyor as described in claim 3 having: a. an integral, annular, bolt loop formed in said rod at the apex of the ''''V'''' formation therein; and b. a bolt passing through said bolt loop into said floating frame so as to secure said preformed spring rod to said frame.
Claim 6
Dependent Claim
29 words
A bag-flattening conveyor as described in claim 3 having: a. a tubular spacing bushing inserted in the bolt loop of each spring rod said bolt passing through said bushing.
Claim 7
Dependent Claim
158 words
A bag-flattening conveyor as described in claim 1 having: a. a plurality of parallel links pivotally mounted at their upper extremities on said floating conveyor frame and similarly mounted at their lower extremities on said main conveyor frame so as to maintain said frames in parallel relation; b. an actuating lever projecting from certain of said links; c. a hydraulic cylinder and piston assembly connected with said actuating lever for swingiNg the latter to adjust the distance between said two frames; d. a pivotally mounted cylindrical spring cup in which the base of said hydraulic cylinder is seated; e. a head formed in said cup and surrounding said cylinder; f. a projecting flange formed on the base of said cylinder; and g. a compression spring surrounding said cylinder within said cup, said spring being compressed between said head and said flange so that sudden tension stresses on said hydraulic cylinder will be absorbed by compression of said spring.
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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) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |