Patent US4809485A successfully refreshed from Google Patents.
US4809485A
Expired / Lapsed
US
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Arrangement for the control of the flow of contents in a packing machine
Assignee: Tetra Pak AB
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Filing: 1987-12-22
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Granted: 1989-03-07
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Expires: 2007-12-22
Abstract
Abstract In packing machines of the type which manufacture packing containers from flexible, tubular material the contents are fed via a filling pipe opening into the tube. The level of contents in the tube is controlled by means of a float which is connected mechanically to a valve located at the mouth of the filling pipe. On filling of highly viscous types of contents an arrangement for the control of the flow of contents is used instead, in accordance with the invention, which comprises a sealing device (14) surrounding the filling pipe (7) which on the one hand prevents the contents from penetrating upwards into the tube (6), and which on the other hand is used for controlling the feed of contents in that its vertical position is monitored by means of a monitoring device (11) surrounding the tube (6) and allowed to control a pump (24) for the feed of contents via the filling pipe (7).
Inventors
- 👤 John E. Nielsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 05:17
CPC Classifications
B; B65; B65B; B65B9/00; B65B9/10; B65B9/20; B65B9/207; B65B39/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
80 words
An arrangement for the control of the flow of contents in a packing machine of the type which fills, seals and separates packing containers from a substantially vertical tube of flexible packing material, into which tube opens up a filling pipe, said arrangement comprising: a movable sealing device which forms a seal against the outside of the filling pipe as well as against the inside of the packing material tube at some distance above the mouth of the filling pipe.
Claim 2
Dependent Claim
80 words
An arrangement for the control of the flow of contents in a packing machine of the type which fills, seals and separates packing containers from a substantially vertical tube of flexible packing material, into which tube opens up a filling pipe, said arrangement comprising: a movable sealing device which forms a seal against the outside of the filling pipe as well as against the inside of the packing material tube at some distance above the mouth of the filling pipe.
Claim 3
Dependent Claim
29 words
The arrangement in accordance with claim 1, wherein the filling pipe, the movable sealing device, and the packing material tube are arranged substantially concentric in relation to each other.
Claim 4
Dependent Claim
30 words
The arrangement in accordance with claim 1, wherein the sealing device is vertically movable between two end positions which are defined by two stopping devices joined to the filling tube.
Claim 5
Dependent Claim
55 words
The arrangement in accordance with claim 3, wherein the sealing device is connected via a helical spring to a cylinder located above the sealing device, the vertical position of the cylinder being adapted to be monitored by means of a level monitoring device for the control of the feed of contents situated outside the tube.
Claim 6
Dependent Claim
55 words
The arrangement in accordance with claim 4, wherein the cylinder comprises an area of μ-metal, the vertical position of which cylinder is adapted to be monitored by means of the level monitoring device, which surrounds the packing material tube and whose signal controls a pump for the feed of contents to the packing material tube.
Claim 7
Dependent Claim
49 words
The arrangement in accordance with claim 1, wherein the sealing device is in the form of a plate provided with a central hole which surrounds the filling pipe and has flexible seals resting against the inside of the packing material tube and the outside of the filling pipe respectively.
Claim 8
Dependent Claim
143 words
An arrangement for controlling the flow of contents in a packing machine of the type that fills, seals, and separates packing containers by feeding the contents into a continuous tube of flexible packing material from a feed tube arranged within the continuous tube of packing material, comprising: a movable seal arranged in a sealing manner between the outside of the feed tube and the inside of the continuous tube of packing material; said seal being adapted to float on the upper level of the contents within the continuous tube of packing material; means mounted outside the continuous tube of packing material for monitoring the level of the contents within the continuous tube of packing material; and means mounted on the movable seal for initiating the monitoring means to emit a flow controlling signal when the level of the contents reaches a predetermined level.
Claim 9
Dependent Claim
143 words
An arrangement for controlling the flow of contents in a packing machine of the type that fills, seals, and separates packing containers by feeding the contents into a continuous tube of flexible packing material from a feed tube arranged within the continuous tube of packing material, comprising: a movable seal arranged in a sealing manner between the outside of the feed tube and the inside of the continuous tube of packing material; said seal being adapted to float on the upper level of the contents within the continuous tube of packing material; means mounted outside the continuous tube of packing material for monitoring the level of the contents within the continuous tube of packing material; and means mounted on the movable seal for initiating the monitoring means to emit a flow controlling signal when the level of the contents reaches a predetermined level.
Claim 10
Dependent Claim
25 words
The arrangement in accordance with claim 7, wherein the initiating means includes a cylinder of high permeability material mounted on top of said movable seal.
Claim 11
Dependent Claim
18 words
The arrangement in accordance with claim 8, further comprising a spring separating the cylinder from the movable seal.
Claim 12
Dependent Claim
29 words
The arrangement in accordance with claim 7, further comprising stops mounted on the feed tube for limiting movement of the movable seal within the continuous tube of packing material.
Claim 13
Dependent Claim
29 words
The arrangement in accordance with claim 9, further comprising stops mounted on the feed tube for limiting movement of the movable seal within the continuous tube of packing material.
References Cited (Backward Citations)
US2687740A
Cited
US3020689A
Cited
US3164936A
Cited
US3269079A
Cited
US3335540A
Cited
US3282020A
Cited
US3470672A
Cited
US3643679A
Cited
US3831821A
Cited
US3916598A
Cited
US4055035A
Cited
US4243160A
Cited
US4541463A
Cited
US4617779A
Cited
US4606174A
Cited
US4608810A
Cited
US4641486A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-03-06 | 1992-09-05 | 1993-03-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-03-06 | 1996-09-05 | 1997-03-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-03-06 | 2000-09-05 | 2001-03-07 | $7700.00 | Window Closed / Lapsed |