Method for controlling a tufting machine

• US 4,519,332 A
• Filed: 12/12/1983
• Issued: 05/28/1985
• Est. Priority Date: 12/12/1983
• Status: Expired due to Fees

• Current Assignee: Fukuda, Tsutomu
• Original Assignee: Fukuda, Tsutomu
• Inventors: Fukuda, Tsutomu
• Primary Examiner(s): Nerbun, Peter
• Application Number:
  US06/560,393
• Time in Patent Office: 533 Days
• Field of Search: 112/266.2, 112/266.1, 112/262.1, 112/79 R, 112/272, 112/277, 112/278, 73/160
• US Class Current: 112/475.19
• CPC Class Codes: D05C 15/14 Arrangements or devices for holding or feeding the base material D05C15/26 takes precedence
• CPC Class Codes: D05C 15/18 Thread feeding or tensioning arrangements
• CPC Class Codes: D05D 2205/16 Display arrangements

Abstract

A method for controlling a tufting machine in which a supply length of a ground fabric and a yarn feed length each for a unit stitch number are selected as control measures. Since the motion of a stitch shaft is steady and stable compared to that of a spiked roller, control in accordance with the present invention results in a stable operation of the tufted machine relative to the conventional method, in which the control measures are based on a unit supply length of the ground fabric. A yarn weight per square meter is also measured and indicated during the tufting operation.

Claims

1. A method for controlling a tufting machine utilized for manufacturing a tufted carpet by stitching yarns supplied by a yarn feed roller onto a ground fabric supplied by a spiked roller by means of needles;

comprising;

pre-establishing a standard supply length of a ground fabric and a standard yarn feed length, each for a predetermined unit stitch number;

determining an actual supply length of the ground fabric and an actual yarn feed length, each for a unit stitch number by means of measured values respectively obtained from a ground fabric supply detector, a yarn feed detector, and a stitch number detector;

comparing the measured values with the standard values; and

automatically controlling the rotational speeds of the spiked roller and/or the yarn feed roller, respectively, to correct the supply rate of the ground fabric and/or the yarn to the standard values when the measured values exceed upper or lower limit of a predetermined allowable range for each of the standard values.

2. A method for measuring a yarn weight of a tufted carpet while manufacturing the same by a tufting machine by tufting yarns supplied by a yarn feed roller onto a ground fabric supplied by a spiked roller by means of needles;

comprising;

pre-establishing a standard yarn feed length either for a unit stitch number or for a unit supply length of a ground fabric;

determining an actual yarn feed length by means of measured values respectively obtained from a ground fabric supply detector, a yarn feed detector, and a stitch number detector;

inputtting a signal for the determined yarn feed length to a calculating device together with signals for the number of yarns and a yarn thickness;

multiplying the signals in the calculating device; and

indicating the results on an indicator.