| 摘要 |
According to the invention, the protective ring, gland ring (9) or lantern ring, for fabric packing in a stuffing box, includes a notch (14) made transversely in a so-called fold area (15) such that the residual thickness (e) of the ring (9) is small in the said area (15) and an opening cut (17) made transversely through the entire cross-section of the ring in an area opposite the fold area (15). It is made from a material, for example based on polyacetal, which is flexible for a small thickness such as that of the fold area, particularly from 0.4 to 0.8 mm. In addition, the configuration of the notch (14) is such that it allows the tabs (18, 19) of the ring (9) to move apart when the fold area (15) is sufficiently deformed in order to allow the passage of the rotating shaft (3). <IMAGE>
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