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Patent US5541734A successfully refreshed from Google Patents.
US5541734A
Expired / Lapsed
US
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System for electronically grading yarn
Assignee: LAWSON HEMPHILL Inc
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Filing: 1994-03-10
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Granted: 1996-07-30
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Expires: 2014-03-10
Abstract
Abstract A system for electronically comparing yarn lengths to assist in grading yarn appearance quality in which the yarn diameter at a number of locations along the total length of the yarn is determined, and representations of the diameters of the yarn are displayed to allow comparison of portions of the yarn.
Inventors
- 👤 Avishai Nevel
- 👤 John B. Lawson
- 👤 Kendall W. Gordon, Jr.
- 👤 David Bonneau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:26
CPC Classifications
G; G01; G01B; G01B11/00; G01B11/08; G01B11/10; G01B11/105
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
47 words
A system for electronically comparing yarn lengths to assist in grading yarn quality, comprising: means for determining the yarn diameter at a number of locations along a length of yarn; and means for displaying representations of the diameters of the yarn to allow comparison of yarn portions.
Claim 2
Independent Claim
47 words
A system for electronically comparing yarn lengths to assist in grading yarn quality, comprising: means for determining the yarn diameter at a number of locations along a length of yarn; and means for displaying representations of the diameters of the yarn to allow comparison of yarn portions.
Claim 3
Dependent Claim
40 words
The system of claim 1 in which said means for determining the yarn diameter includes a light source for shining light on the yarn in a yarn measurement zone and light receiving means for receiving light passed by the yarn.
Claim 4
Dependent Claim
43 words
The system of claim 2 in which the light receiving means includes an array of small light receiving elements, and said means for determining the yarn diameter further includes means for determining which array elements have not received light from the light source.
Claim 5
Dependent Claim
37 words
The system of claim 3 in which said means for determining the yarn diameter further includes means for determining the farthest-spaced pair of light receiving elements that have not received light as indicative of the yarn diameter.
Claim 6
Dependent Claim
27 words
The system of claim 1 further including means for dividing the diameters into a plurality of groups, each group representing a portion of the length of yarn.
Claim 7
Dependent Claim
22 words
The system of claim 5 in which the groups of diameters are adjacent so that the portion of yarn measured is continuous.
Claim 8
Dependent Claim
22 words
The system of claim 1 in which said means for displaying includes means for assigning different representation parameters to different yarn diameters.
Claim 9
Dependent Claim
18 words
The system of claim 7 in which said representation parameters include different grey values for a monochrome display.
Claim 10
Dependent Claim
16 words
The system of claim 7 in which representation parameters include different colors for a color display.
Claim 11
Dependent Claim
16 words
The system of claim 1 in which said means for displaying representations includes a video display.
Claim 12
Dependent Claim
28 words
The system of claim 5 in which said means for displaying representations includes means for displaying the representations of the groups side-by-side to facilitate comparison of the groups.
Claim 13
Dependent Claim
15 words
The system of claim 5 in which the groups represent yarn portions of different lengths.
Claim 14
Dependent Claim
21 words
The system of claim 1 further including means for establishing a width threshold and length threshold to define a yarn event.
Claim 15
Dependent Claim
18 words
The system of claim 13 in which the displayed representation for an event is a short line segment.
Claim 16
Dependent Claim
32 words
The system of claim 14 in which there is no display for non-events in the length of yarn to create a display of spaced line segments that facilitates recognition of event regularity.
Claim 17
Independent Claim
115 words
A system for electronically comparing yarn lengths to assist in grading yarn quality, comprising: a light source for providing light to a yarn measurement zone; means for moving yarn through the measurement zone; a linear array of light-sensing elements for receiving light passed by the yarn; means for determining the yarn diameter at a number of closely-spaced locations along a length of yarn; means for dividing the diameters into a plurality of groups each representing a portion of the length of yarn; means for assigning different representation parameters to different yarn diameters; and means for displaying the representation parameters of the yarn portions side-by-side on a video display to allow comparison of the yarn portions.
Claim 18
Independent Claim
115 words
A system for electronically comparing yarn lengths to assist in grading yarn quality, comprising: a light source for providing light to a yarn measurement zone; means for moving yarn through the measurement zone; a linear array of light-sensing elements for receiving light passed by the yarn; means for determining the yarn diameter at a number of closely-spaced locations along a length of yarn; means for dividing the diameters into a plurality of groups each representing a portion of the length of yarn; means for assigning different representation parameters to different yarn diameters; and means for displaying the representation parameters of the yarn portions side-by-side on a video display to allow comparison of the yarn portions.
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) | 1999-07-30 | 2000-01-29 | 2000-07-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-07-30 | 2004-01-29 | 2004-07-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-07-30 | 2008-01-29 | 2008-07-30 | $7700.00 | Window Closed / Lapsed |