| 摘要 |
A lever, in its gooseneck-shaped top part, has a non-circular, curvilinear internal configuration with a wide gap toward the outside and a perpendicular anchoring ridge in the widest part oriented toward the inside to work together with a span ring made of an elastomer material arranged on an end piece of the receiving end of the mandrel of a spool of material, and a counterweight device, comprising a counterweight cam that works together with the lever with each turn of a drum.
|
