Carding machine with drawing rollers at the outlet

A carding machine, comprising:

• a main card having a delivery arrangement for delivering fibre sliver at a delivery speed;
• a regulated drafting system incorporated into said delivery arrangement, said drafting system comprising intake drafting bodies and delivery drafting bodies, said drafting system controlling draft of the fibre sliver by varying delivery speed of the fibre sliver;
• fibre sliver sensor elements configured with said drafting system for generating measuring values of the drafted sliver acted upon by said drafting system in a closed loop system;
• and
• a sliver depositing device disposed downstream from said drafting system and including a drive controlled as a function of said drafting system measuring values such that a fibre sliver portion extending between said drafting system and said depositing device is maintained within a predetermined length with changes of said fibre delivery speed from said delivery arrangement.

A carding machine, comprising:

• a main card having a delivery arrangement for delivering fibre sliver at a delivery speed;
• a regulated drafting system configured with said delivery arrangement, said drafting system comprising intake drafting bodies and delivery drafting bodies, said drafting system controlling draft of the fibre sliver by varying delivery speed of the fibre sliver;
• fibre sliver sensor elements configured with said drafting system for generating measuring values of the drafted sliver acted upon by said drafting system in a closed loop system;
• a sliver depositing device disposed downstream from said drafting system and including a drive controlled as a function of said drafting system measuring values such that a fibre sliver portion extending between said drafting system and said depositing device is maintained within a predetermined length with changes of said fibre delivery speed from said delivery arrangement;
• and
• wherein an adjustment to said drafting bodies determined by said drafting system is applied to said drive of said sliver depositing device at a predetermined time lag so as to minimize deviations in fibre sliver length between said drafting system and said depositing device as a function of changes in delivery speed.

A carding machine, comprising:

• a main card having a supply device for supplying fibre material to said card and a delivery arrangement for delivering a fibre sliver from said card at a delivery speed;
• a regulated drafting system configured with said delivery arrangement, said drafting system comprising drafting bodies and a sensor disposed to measure mass of the drafted fibre sliver delivered by said card, said drafting system acting upon the measured mass to regulate draft of the fibre sliver at said delivery arrangement as a function of already drafted fibre sliver;
• said sensor in communication with said supply device such that supply of fibre material to said card is regulated as a function of drafting by said drafting system;
• a fibre sliver storage device disposed upstream of said drafting system;
• and
• a drive for said drafting system configured to provide a base rotational speed to said drafting bodies, said sensor disposed between said main card and said drafting system such that said base rotational speed is regulated by said drafting system as a function of a control signal generated by said sensor.