US4381545A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control means and method for powder bagging
Assignee: EIDP Inc
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Filing: 1980-12-29
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Granted: 1983-04-26
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Expires: 2000-12-29
Abstract
Abstract Means and method for automatically controlling a powder bagging machine, said powder bagging machine having a weighing means for measuring the quantity of powder dispensed, and a means for dispensing the powder into a container, said automatic control means comprising a comparator means for sensing deviations in weight as measured by said weighing means, a control means for analyzing said weight deviations and for controlling the dispensing means. The method of the present invention comprises operating said means so as to effect a multi-stage filling cycle, the first stage comprising operating said dispensing means at a predetermined high speed for a predetermined time, the second stage(s) comprising controlled rate(s) of deceleration of said dispensing means, and the optional last stage comprising operating said dispensing means at a predetermined low speed or at a low rate of deceleration from a predetermined low speed until the desired weight of powder is dispensed.
Inventors
- 👤 Nicholas Biddle, III
- 👤 Stephen R. Craig
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:49
CPC Classifications
G; G01; G01G; G01G13/00; G01G13/24; G01G13/28; G01G13/285; G01G13/2851; G01G13/2852; B; B65; B65B; B65B1/00; B65B1/30; B65B1/32; B65B1/34
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
106 words
A method for automatically controlling a powder bagging machine, said powder bagging machine having a weighing means for measuring the weight of powder dispensed and a means for dispensing the powder into a container, said method comprising the following steps in sequence: (a) operating said dispensing means during a first stage at a predetermined high speed for a predetermined time, (b) measuring the weight of powder dispensed during said first stage and comparing said measured weight with a desired total weight, (c) operating said dispensing means during a second stage at a decelerating speed, the rate of deceleration determined by the measurement taken in step (b).
Claim 2
Independent Claim
106 words
A method for automatically controlling a powder bagging machine, said powder bagging machine having a weighing means for measuring the weight of powder dispensed and a means for dispensing the powder into a container, said method comprising the following steps in sequence: (a) operating said dispensing means during a first stage at a predetermined high speed for a predetermined time, (b) measuring the weight of powder dispensed during said first stage and comparing said measured weight with a desired total weight, (c) operating said dispensing means during a second stage at a decelerating speed, the rate of deceleration determined by the measurement taken in step (b).
Claim 3
Dependent Claim
71 words
The method of claim 1 wherein the second stage, step (c), is replaced by a plurality of deceleration stages in sequence, each of such stages comprising operating said dispensing means at a decelerating speed, the rate of deceleration in each of said stages determined by a weight measurement taken at the beginning of each of said deceleration stages and a comparison of each of said measurements with the desired total weight.
Claim 4
Dependent Claim
52 words
The method of claim 2 wherein at least one period of constant velocity is interspersed between two of said deceleration stages, and a weight measurement is taken during said period of constant velocity, which measurement is used to determine the deceleration in the deceleration stage immediately following said period of constant velocity.
Claim 5
Dependent Claim
22 words
The method of claim 2 wherein the second stage, step (c), continues until the desired total weight of powder has been dispensed.
Claim 6
Dependent Claim
34 words
The method of claim 1 wherein the weight measurement of step (b) is conducted after the dispensing means is slowed to a predetermined speed substantially lower than the high operating speed of step (a).
Claim 7
Dependent Claim
48 words
The method of claim 1 wherein said second stage continues until a predetermined low speed is reached, and the method further comprises a third stage during which said dispensing means is operated at the predetermined constant low speed until the desired total weight of powder has been dispensed.
Claim 8
Dependent Claim
84 words
The method of claim 6 wherein the second stage, step (c), is replaced by a plurality of deceleration stages in sequence, each of such stages comprising operating said dispensing means at a decelerating speed, the rate of deceleration in each of said stages determined by a weight measurement taken at the beginning of each of said deceleration stages and a comparison of each of said measurements with the desired total weight, said deceleration stages continuing until the dispensing speed reaches the predetermined low speed.
Claim 9
Dependent Claim
48 words
The method of claim 1 wherein said second stage continues until a predetermined low speed is reached, and the method further comprises a third stage during which said dispensing means is operated at a predetermined rate of deceleration until the desired total weight of powder has been dispensed.
Claim 10
Dependent Claim
73 words
The method of claim 1 wherein said second stage continues until a predetermined low speed is reached, and the method further comprises a third stage during which said dispensing means is operated at a rate of deceleration until the desired total weight of powder has been dispensed, said rate determined by a weight measurement taken at the beginning of said third stage and a comparison of said measurement with the desired total weight.
Claim 11
Dependent Claim
22 words
The method of claim 1 wherein the second stage, step (c), continues until the desired total weight of powder has been dispensed.
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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) | 1986-04-25 | 1986-10-25 | 1987-04-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-04-25 | 1990-10-25 | 1991-04-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-04-25 | 1994-10-25 | 1995-04-26 | $7700.00 | Window Closed / Lapsed |