Knot passing coating apparatus

Improved apparatus for coating cord of the type having:

• a frame,
• housing means mounted on said frame defining an extrusion chamber, said chamber having a cord entrance means, a coating material entrance means and an exit means for coated cord;
• means for supplying cord to the cord entrance means to said extrusion chamber
• means for supplying coating material to said coating material entrance means to said extrusion chamber, and means for withdrawing coated cord from said exit means, wherein the improvement comprises:
• said cord entrance means including a cord guide member having a face having at least one groove therein and a notched roll rotably mounted on said frame having a notch substantially parallel to the axis of rotation of said roll, the surface of said roll engaging the face of said cord guide member,
• a backup shaft rotably mounted on said frame, said shaft having a substantially cylindrical off-set portion and two substantially cylindrical end portions, the centerlines of said end portions coinciding and the centerline of said offset portion being substantially parallel to the centerline of said end portions but not coinciding therewith;
• a backup roll having a substantially cylindrical surface rotably mounted on said backup shaft, the axis of rotation of said backup roll being substantially parallel to the axis of rotation of said notched roll, the axis of rotation of said backup roll coinciding with the centerline of said center portion, said backup roll urging said notched roll into engagement with the face of said cord guide member;
• means for rotating said backup shaft about the centerline of its end portions and maintaining the position of said backup shaft whereby the pressure of said notched roll on said cord guide may be varied;
• means for detecting sudden enlargements in said cord;
• means operably associated with said means for detecting sudden enlargements in said cord for rotating said notched roll and to cause said notch in said notched roll to coincide with said enlargement and to allow enlargements to enter said extrusion chamber and be coated by said coating material, said means including single revolution clutch means.

Improved apparatus for coating cord of the type having:

• a frame,
• housing means mounted on said frame defining an extrusion chamber, said chamber having a cord entrance means, a coating material entrance means and an exit means for coated cord;
• means for supplying cord to the cord entrance means to said extrusion chamber
• means for supplying coating material to said coating material entrance means to said extrusion chamber, and means for withdrawing coated cord from said exit means, wherein the improvement comprises:
• said cord entrance means including a cord guide member having a face having at least one groove therein and a notched roll rotably mounted on said frame having a notch substantially parallel to the axis of rotation of said roll, the surface of said roll engaging the face of said cord guide member,
• means for detecting sudden enlargements in said cord;
• means operably associated with said means for detecting sudden enlargements in said cord for rotating said notched roll and to cause said notch in said notched roll to coincide with said enlargement and to allow enlargements to enter said extrusion chamber and be coated by said coating material said means including single revolution clutch means.