| 摘要 |
PCT No. PCT/IT90/00031 Sec. 371 Date Sep. 17, 1991 Sec. 102(e) Date Sep. 17, 1991 PCT Filed Mar. 20, 1990 PCT Pub. No. WO90/11057 PCT Pub. Date Oct. 4, 1990.Motor-driven apparatus for cleaning spaces between teeth by dental floss comprising a dental floss for cleaning the spaces between teeth, motor means (11), a feeding reel (24) of the fresh dental floss, a take-up reel (25) of the worn-out dental floss, a set of pulleys (18, 20, 21A, 21B) about which the dental floss is running between feeding reel and take-up reel, and reciprocating motor means (13, 15, 16, 18) to reciprocate the operating length of the dental floss as well as to keep it stretched and to replace the dental floss as it is worn-out. |
