Method and apparatus for measuring irregularities in the cross-section of yarns, roving, bands and the like
AssigneeZellweger, Ltd.
InventorPeter Feller
Life of this patent
Estimating the term…
Abstract
A method of, and apparatus for, measuring irregularities in the cross-section of yarns, rovings, bands and the like, by means of a preferably portable measuring apparatus or device providing a direct read-out or display and containing a measuring element, amplifying- and signal converting circuitry as well as an indicator or display device. A measuring signal derived from a yarn irregularity signal is checked with respect to the number of times it passes through at least one given reference value or hysteresis range, and the indicated value for the irregularity constitutes a statistically certain or significant value whenever the number of passes through the reference value or hysteresis range has reached at least a predetermined value.
Claims23
A method of measuring irregularities in the cross-section of textile materials, especially yarns, rovings, bands and the like, comprising the steps of:
- testing the textile material for detecting irregularities in its cross-section;
- deriving a textile material-irregularity signal from the detected irregularities;
- deriving a measuring signal from the textile material-irregularity signal;
- checking the measuring signal with respect to the number of times it passes through at least one predetermined reference value or a hysteresis range to thereby form an indicator value;
- and
- classifying the indicator value for the irregularities as statistically of significance when the number of passes through the reference value or hysteresis range has reached at least a predetermined value.
A method of measuring irregularities in the cross-section of textile materials, especially yarns, rovings, bands and the like, comprising the steps of:
- examining the textile material for detecting irregularities in its cross-section;
- deriving a textile material-irregularity signal from the detected irregularities;
- deriving a measuring signal from the textile material-irregularity signal;
- checking the measuring signal with respect to the number of times it passes through at least one predetermined reference value to thereby form an indicator value;
- and
- classifying the indicator value for the irregularities as statistically of significance when the number of passes through the reference value has reached at least a predetermined value.
An apparatus for measuring the irregularities in the cross-section of textile materials, especially yarns, rovings, bands and the like, comprising:
- a measuring element for producing a textile material-irregularity signal from the textile material;
- amplifying- and signal converting circuit means operatively connected with said measuring element for producing a textile material-measuring signal from said textile material-irregularity signal;
- an indicator device for displaying the measured irregularities in the cross-section of the textile material;
- said circuit means containing a conductor carrying the textile material-measuring signal derived from the textile material-irregularity signal;
- a counter connected with said conductor for counting the passage of the textile material-measuring signal through at least one predetermined reference value;
- and
- at least one indicator means which, upon reaching a predetermined number of passes of the textile material-measuring signal through said at least one predetermined reference value, delivers at least one further signal.
An apparatus for measuring the irregularities in the cross-section of textile materials, especially yarns, rovings, bands and the like, comprising:
- a measuring element for producing a textile material-irregularity signal from the textile material;
- amplifying- and signal converting circuit means operatively connected with said measuring element for producing a textile material-measuring signal from said textile material-irregularity signal;
- an indicator device for displaying the measured irregularities in the cross-section of the textile material;
- a counter connected with said circuit means for counting the passage of the textile material-measuring signal through at least one predetermined reference value;
- and
- at least one indicator means which, upon reaching a predetermined number of passes of the textile material-measuring signal through said at least one predetermined reference value, provides an indication of the statistical significance of the measured irregularities in the cross-section of the textile material displayed by the indicator device.
Dependencies are inferred from the claim text.