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US4786177A
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Method and apparatus for measuring the weft or mesh serial position in textiles
Assignee: Mahlo GmbH and Co KG
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Filing: 1987-09-30
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Granted: 1988-11-22
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Expires: 2007-09-30
Abstract
Abstract A system for measuring the weft or mesh serial position in textiles, in which the angular position of the weft/mesh series is measured for determining the angle of distortion passing over a partial amount of the length thereof, includes an illumination measuring system which measures values of light from a light source either passing through or reflected from the textile fabric to be tested, in a substantially linear range, and an adjusting assembly which reciprocally and oscillatingly rotates the linear range about a central angle to adjust the linear range at an angle relative to the textile fabric; rotating or measuring the reflection or transmission values in several discrete equidistant angular units; a group of memories for storing the measured values corresponding to at least a few angular units; and a digital unit connected to the memories for comparing the stored values in calculating a distortion angle in response to such comparison.
Inventors
- 👤 Hellmut Beckstein
- 👤 Siegfried Wild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 21:29
CPC Classifications
D; D06; D06H; D06H3/00; D06H3/12; D06H3/125; G; G01; G01B; G01B11/00; G01B11/26
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
126 words
A method for measuring a weft or mesh serial position in textiles, in which an angular position of the weft/mesh series is measured for determining an angle of distortion passing over a partial amount of the length thereof, comprising the steps of: (a) measuring a substantially linear range of values of said textiles with regard to light transmission or reflective properties thereof; (b) reciprocally and oscillatingly rotating said linear range about a central angle in discrete units; (c) carrying out one of: (i) the rotation movement of said linear range in discrete units, and (ii) the measurement of the reflection or transmission values in several discrete angular units; and (d) comparing the measurements obtained for each one of the angle units to determine the distortion angle.
Claim 2
Independent Claim
126 words
A method for measuring a weft or mesh serial position in textiles, in which an angular position of the weft/mesh series is measured for determining an angle of distortion passing over a partial amount of the length thereof, comprising the steps of: (a) measuring a substantially linear range of values of said textiles with regard to light transmission or reflective properties thereof; (b) reciprocally and oscillatingly rotating said linear range about a central angle in discrete units; (c) carrying out one of: (i) the rotation movement of said linear range in discrete units, and (ii) the measurement of the reflection or transmission values in several discrete angular units; and (d) comparing the measurements obtained for each one of the angle units to determine the distortion angle.
Claim 3
Dependent Claim
41 words
A method according to claim 1; wherein said step of measuring includes the steps of effecting said measurement for a few angular units, and selecting an angular width of said linear range narrowly in relation to spacing between the angle units.
Claim 4
Dependent Claim
30 words
A method according to claim 1; further including the step of adjusting a time sequence of the angular units according to a speed and nature (yarn count) of the textiles.
Claim 5
Dependent Claim
28 words
A method according to claim 1; said step of comparing determines the distortion angle with reference to the (angular) position of maximums and/or minimums of the measured values.
Claim 6
Dependent Claim
29 words
A method according to claim 1; wherein said step of comparing defines said distortion angle by determining symmetry properties of the measured values in relation to a central angle.
Claim 7
Dependent Claim
39 words
A method according to claim 4; wherein said step of comparing includes a step of interpolation which is effected on the basis of a known mathematical function for determining positions of the maximums and/or minimums between the measured values.
Claim 8
Dependent Claim
22 words
A method according to claim 5; wherein a unit between two extreme maximum or minimum values is determined as the central angle.
Claim 9
Dependent Claim
22 words
A method according to claim 1; wherein the angular unit closest to the determined distortion angle is defined as a central angle.
Claim 10
Independent Claim
107 words
An apparatus for measuring the weft or mesh serial position in textiles, comprising: illumination measuring means for measuring values of light from a light source passing through or reflected from the textiles to be tested, in a substantially linear range; adjusting means for adjusting said linear range at an angle relative to the textiles, such that said linear range is tilted or rotated in several discrete equidistant angle units; memory means for storing measured values corresponding to at least a few angular units; and a digital means connected to said memory means for comparing the stored values and calculating a distortion angle in response to the comparison.
Claim 11
Independent Claim
107 words
An apparatus for measuring the weft or mesh serial position in textiles, comprising: illumination measuring means for measuring values of light from a light source passing through or reflected from the textiles to be tested, in a substantially linear range; adjusting means for adjusting said linear range at an angle relative to the textiles, such that said linear range is tilted or rotated in several discrete equidistant angle units; memory means for storing measured values corresponding to at least a few angular units; and a digital means connected to said memory means for comparing the stored values and calculating a distortion angle in response to the comparison.
Claim 12
Dependent Claim
22 words
An apparatus according to claim 9; wherein the angular width of said linear range is less than that of an angle unit.
Claim 13
Dependent Claim
62 words
An apparatus according to claim 9; further comprising means for detecting fabric speed or yarn count per unit time, said detecting means being connected with said adjusting means in a manner such that an adjusting speed defined by the number of angular units per time unit is proportional to the yarn count per unit time or to the speed of the fabric.
Claim 14
Dependent Claim
34 words
An apparatus according to claim 9; wherein said adjusting means is connected with said digital means in a manner such that said linear range is symmetrically adjusted with periodic oscillation about a central angle.
Claim 15
Dependent Claim
16 words
An apparatus according to claim 9; wherein said adjusting means comprises at least one stepping motor.
Claim 16
Dependent Claim
48 words
An apparatus according to claim 13; wherein said stepping motor is connected with drive means constructed in a manner such that said stepping motor is rotatable about its angle of rotation in equidistant, precise second angular units which are substantially smaller in volume than said first-mentioned angular units.
Claim 17
Dependent Claim
35 words
An apparatus according to claim 14; wherein said drive means comprises an additional stepping motor having laterally connected stepdown gears with an output shaft, and said stepping motor is coaxially mounted on said output shaft.
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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) | 1991-11-22 | 1992-05-23 | 1992-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-11-22 | 1996-05-23 | 1996-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-11-22 | 2000-05-23 | 2000-11-22 | $7700.00 | Window Closed / Lapsed |