Air processing apparatus

A processing apparatus for processing yarn from a source comprising:

• at least one first roll for engaging and pulling the yarn from the source;
• a first motor for rotatably driving said first roll;
• a yarn processor for receiving and processing the yarn to produce a desired effect;
• a second roll for engaging and pulling the yarn at a second rate;
• an acceleration/deceleration circuit for producing a linear ramp signal linearly varying between first and second voltages;
• switch means for actuating the acceleration/deceleration circuit to switch between producing the first voltage and the second voltage;
• voltage to frequency converter means for receiving the linear ramp signal and producing a control frequency at a frequency corresponding to the voltage of the linear ramp signal;
• frequency to voltage converter means for receiving the control frequency and for producing at least one control voltage corresponding to said control frequency;
• first motor control means for receiving at least one control voltage for controlling the speed of said first motor;
• second motor control means for receiving at least one control voltage for controlling the speed of said second motor independently of the speed of said first motor.

A processing apparatus for processing yarn from a source comprising:

• at least one feed roll for engaging and pulling the yarn from the source and feeding the yarn at a feed rate;
• a feed motor for rotatably driving said feed roll;
• a yarn processor for receiving the yarn from said feed roll and processing the yarn to produce a desired effect;
• a wind roll for engaging and pulling the processed yarn at a wind rate;
• a wind motor for rotatably driving said wind roll independently from said feed roll;
• a feed rate sensor for monitoring the feed rate of said feed roll;
• a wind rate sensor for monitoring the wind rate of said wind roll;
• a precision fixed voltage source for selectively producing first and second control voltages;
• a switch connected to receive and switch between the first and second control voltages;
• an acceleration/deceleration circuit connected to said switch which produces a linear ramp when said switch changes between said first and second voltages, said linear ramp signal having a constant linear rate of voltage change between said first and second control voltages;
• a voltage-to-frequency converter connected to said acceleration/deceleration circuit to selectively receive one of said first and second control voltages for producing a control frequency at a frequency corresponding to one of said first and second control voltages and said linear ramp signal;
• a feed frequency-to-voltage converter for receiving said control frequency and for producing a feed control voltage corresponding to said control frequency;
• a feed D.C. drive connected to receive the feed control voltage and for driving said feed motor at a speed corresponding to said feed control voltage;
• a wind frequency-to-voltage converter for receiving said control frequency and for producing a wind control voltage corresponding to said control frequency;
• and
• a wind D.C. drive connected to receive the wind control voltage for driving said wind motor at a speed corresponding to said delivery control voltage.

A processing apparatus for processing yarn from a source comprising:

• a yarn processor for receiving the yarn from the source and processing the yarn to achieve a desired effect;
• at least one delivery roll for engaging and pulling the yarn from said processor at a delivery rate;
• a delivery motor for rotatably driving said delivery roll independently;
• a wind roll for engaging and pulling the yarn from said delivery roll at a wind rate;
• a wind motor for rotatably driving said wind roll independently from said delivery roll;
• a delivery rate sensor for monitoring the delivery rate of said delivery roll;
• a wind rate sensor for monitoring the wind rate of said wind roll;
• a precision fixed voltage source for selectively producing first and second control voltages;
• a switch connected to receive and switch between the first and second control voltages;
• an acceleration/deceleration circuit connected to said switch which produces a linear ramp when said switch changes between said first and second voltages, said linear ramp signal having a constant linear rate of voltage change between said first and second control voltages;
• a voltage-to-frequency converter connected to said acceleration/deceleration circuit to selectively receive one of said first and second control voltages for producing a control frequency at a frequency corresponding to one of said first and second control voltages and said linear ramp signal;
• a delivery frequency-to-voltage converter for receiving said control frequency and for producing a delivery control voltage corresponding to said control frequency;
• a delivery D.C. drive connected to receive the delivery control voltage for driving said delivery motor at a speed corresponding to said delivery control voltage;
• a wind frequency-to-voltage converter for receiving said control frequency and for producing a wind control voltage corresponding to said control frequency;
• and
• a wind D.C. drive connected to receive the wind control voltage for driving said wind motor at a speed corresponding to said delivery control voltage.

An air processing apparatus for air entangling at least one strand of yarn from a source comprising:

• at least a first roll for engaging and pulling the yarn from the source at a first rate;
• means for guiding the strands of yarn into a side by side relationship on the first roll;
• first motive means for rotatably driving and said first roll;
• an air entangler for receiving and air entangling the strands of yarn with a high pressure air stream;
• at least one second roll for engaging and pulling the yarn at a second rate;
• second motive means for rotatably driving said second roll independently from said first roll;
• sensor means for sensing speed information of the first and second rates;
• output means for outputting the speed information and for outputting a ratio signal corresponding to the ratio of the first rate to the second rate;
• control means for independently controlling said first and second motive means to independently vary the first and second rates and, thus, the speed information, whereby the speed information is used to vary the first and second rates to produce a desired effect on the yarn.