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US 4,561,152 AGranted
Draft roll system for spinning machines
AssigneeKabushiki Kaisha Toyoda Jidoshokki Seisakusho
InventorsKiwamu Niimi, Kenji Kinoshita
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AssigneeKabushiki Kaisha Toyoda Jidoshokki Seisakusho
InventorsKiwamu Niimi, Kenji Kinoshita
Estimating the term…
The present invention provides a draft roll arrangement in a spinning frame in which the apron bottom roll is longitudinally divided into two sections at a location along its length selected to be within a range for which torsion of the apron bottom roll does not pose a problem in spinning, and in which the respective bottom rolls are operatively connected to one another in such a manner that one of the ends of the back and front bottom rolls and one apron bottom roll section are connected to a driving source and the drive for the other apron bottom roll section is derived through the back and front bottom rolls. In a preferred embodiment, the respective apron bottom roll sections are associated with rotational angle sensors whose output rotational angle signals are supplied to a control unit. When the difference in the rotational angle has exceeded a preset value, an output signal indicating such state is issued from the control unit.
A draft roll device for a spinning machine comprising a back bottom roll, means defining an apron bottom roll, and a front bottom roll, all connected at common side ends thereof to a driving source through a first drive transmission system and driven at a predetermined speed ratio between any two of said rolls, said means defining an apron bottom roll comprising a first apron bottom roll section at said common side end thereof and a separate and substantially independently mounted but axially aligned second apron bottom roll section at the other side end thereof;
Dependencies are inferred from the claim text.