Knot hole beam

A knot hole beam, especially a warp beam for a loom, for winding-up yarn or the like, comprising:

• a winding tube having a lengthwise axis and a peripheral portion provided with knot holes;
• an insertion bore serving for the insertion of a bundle of knotted together yarn ends provided for each knot hole;
• means for providing at least one knot arresting opening merging with the insertion bore and being narrower than said insertion bore;
• an arresting projection provided for each knot hole for the inserted knot, said arresting projection being disposed between the insertion bore and the knot arresting opening at least at one side of an edge of the knot hole and extending towards a line which is substantially axially parallel to the lengthwise axis of the winding tube, said axially parallel line passing through the center of the insertion bore;
• said arresting projection being situated closer to said axially parallel line than an outer peripheral portion of the knot arresting opening which is situated furthest from such axially parallel line;
• and
• side walls of a portion connecting the insertion bore with the knot arresting opening being flexed whereby the knot arresting opening extends in a direction essentially transverse to said axially parallel line.

A knot hole beam, especially a warp beam for a loom, for winding-up yarn or the like, comprising:

• a winding tube having a lengthwise axis and a peripheral portion provided with knot holes;
• an insertion bore serving for the insertion of a bundle of knotted together yarn ends provided for each knot hole;
• means for providing at least one knot arresting opening merging with the insertion bore and being narrower than said insertion bore;
• an arresting projection provided for each knot hole for the inserted knot, said arresting projection being disposed between the insertion bore and the knot arresting opening at least at one side of an edge of the knot hole and extending towards a line which is substantially axially parallel to the lengthwise axis of the winding tube, said axially parallel line passing through the center of the insertion bore;
• said arresting projection being situated closer to said axially parallel line than an outer peripheral portion of the knot arresting opening which is situated furthest from such axially parallel line;
• each said insertion bore and said at least one knot arresting opening having a respective center interconnected by a connection line;
• and
• the angle between said connection line and said axially parallel line deviating from 0.degree. and 90.degree..