US3916598A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synchronized tube forming and filling machine for forming chub packages
Assignee: ETI EXPLOSIVES TECHNOLOGIES INTE
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Filing: 1974-10-15
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Granted: 1975-11-04
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Expires: 1994-10-15
Abstract
Abstract Chub packaging machine wherein the drive motors for the tubeadvancing means, the constricting-closure unit, and the product feed pump, and drive motor for an extruder sealing unit, or the air temperature of a hot-air sealing unit, operate cooperatively whereby all drive speeds change proportionately as the tubeadvancement rate, or sealing air temperature, is changed. The constricting-closure unit and product feed pump drive motors operate also independently for more precise adjustment, preferably through automatic feedback control loops.
Inventors
- 👤 Philip Edgar Adams
- 👤 Frank Marsden Willis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:35
CPC Classifications
B; B65; B65B; B65B9/00; B65B9/10; B65B9/20; B65B9/2014; B65B9/2028; B65B57/00; B65B9/213
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
207 words
In a packaging machine of the type which forms a web of pliable film material into a tube, feeds material to be packaged into the tube, and constricts and seals the filled tube at intervals to divide it into a plurality of individual packages, said machine including (a) tube-feeding means for advancing said tube, (b) sealing means for forming a longitudinal seam in said tube, (c) a constricting-closure unit reciprocable in the direction of axial movement of said tube for constricting the tube at spaced intervals and applying a pair of successive encircling closure means to each constricted area, and (d) a feed pump for feeding material to be packaged into said tube through a hollow mandrel, the improvement comprising 1. for cooperatively controlling elements (a), (b), (c), and (d) so that the advancement rate of the tube, the reciprocating rate of the constricting-closure unit, the rate at which material is fed into the tube, and the rate at which the seam is produced are maintained in a selected proportion as the advancement rate of the tube is changed; 2. means for independently adjusting the reciprocating rate of the constricting-closure unit; and 3. means for independently adjusting the rate at which material is fed into said tube.
Claim 2
Dependent Claim
207 words
In a packaging machine of the type which forms a web of pliable film material into a tube, feeds material to be packaged into the tube, and constricts and seals the filled tube at intervals to divide it into a plurality of individual packages, said machine including (a) tube-feeding means for advancing said tube, (b) sealing means for forming a longitudinal seam in said tube, (c) a constricting-closure unit reciprocable in the direction of axial movement of said tube for constricting the tube at spaced intervals and applying a pair of successive encircling closure means to each constricted area, and (d) a feed pump for feeding material to be packaged into said tube through a hollow mandrel, the improvement comprising 1. for cooperatively controlling elements (a), (b), (c), and (d) so that the advancement rate of the tube, the reciprocating rate of the constricting-closure unit, the rate at which material is fed into the tube, and the rate at which the seam is produced are maintained in a selected proportion as the advancement rate of the tube is changed; 2. means for independently adjusting the reciprocating rate of the constricting-closure unit; and 3. means for independently adjusting the rate at which material is fed into said tube.
Claim 3
Dependent Claim
12 words
means for independently adjusting the reciprocating rate of the constricting-closure unit; and
Claim 4
Dependent Claim
12 words
means for independently adjusting the reciprocating rate of the constricting-closure unit; and
Claim 5
Dependent Claim
71 words
A machine of claim 1 wherein said sealing means is an extruder of hot thermoplastic material, and said means for cooperatively controlling elements (a), (b), (c), and (d) comprises a variable-delivery hydraulic pump connected in series with, and adapted to deliver fluid under pressure to, series-connected hydraulic drive motors for the tube-feeding means, constrictiNg-closure unit, extruder, and feed pump, the output of said hydraulic pump being adapted to be changed manually.
Claim 6
Dependent Claim
82 words
A machine of claim 1 wherein said sealing means is a hot-air jet unit, and said means for cooperatively controlling elements (a), (b), (c), and (d) comprises a variable-delivery hydraulic pump connected in series with, and adapted to deliver fluid under pressure to, series-connected hydraulic drive motors for the tube-feeding means, constricting-closure unit, and feed pump, the output of said hydraulic pump being adapted to change in response to a change in the temperature of the air produced in said sealing means.
Claim 7
Dependent Claim
14 words
means for independently adjusting the rate at which material is fed into said tube.
Claim 8
Dependent Claim
14 words
means for independently adjusting the rate at which material is fed into said tube.
Claim 9
Dependent Claim
32 words
A machine of claim 2 wherein the drive motors for the tube-feeding means and extruder are fixed-volume motors, and the drive motors for the constricting-closure unit and feed pump are variable-volume motors.
Claim 10
Dependent Claim
63 words
A machine of claim 2 wherein the drive motors for the tube-feeding means, extruder, and feed pump are fixed-volume motors; the drive motor for the constricting-closure unit is a variable-volume motor; said variable-delivery hydraulic pump connected in series with said drive motors is a first hydraulic pump; and a second variable-delivery hydraulic pump is connected in parallel with said feed pump drive motor.
Claim 11
Dependent Claim
58 words
A machine of claim 1 wherein drive means for the constricting-closure unit is controlled by an automatic feedback control loop wherein the tube-advancement rate and reciprocation rate of the constricting-closure unit are sensed, and a signal is sent to said constricting-closure unit drive means whereby the rate thereof is adjusted as required to maintain a preselected package length.
Claim 12
Dependent Claim
52 words
A machine of claim 1 wherein drive means for the feed pump is controlled by an automatic feedback control loop wherein pressure in the package is sensed, and a signal is sent to the feed pump drive means whereby the rate thereof is adjusted as required to maintain a preselected package tightness.
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) | 1978-11-03 | 1979-05-05 | 1979-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-03 | 1983-05-05 | 1983-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-03 | 1987-05-05 | 1987-11-04 | $7700.00 | Window Closed / Lapsed |