Claims
- 1. The method of making a dental floss comprising the steps of feeding a core strand to a tangling zone at a predetermined first rate and withdrawing the core strand at a determined second rate; simultaneously feeding at least one effect strand at a predetermined third rate to the tangling zone with the core strand; alternatingly tensioning and relaxing the effect strand in the tangling zone and withdrawing the effect strand with core strand as a composite yarn; thereafter combining the composite yarn with a waxed support yarn and winding the combined yarn into a package; heating the package to migrate a portion of the wax from the support yarn to the combined yarn; and thereafter cooling the package to ambient conditions.
- 2. The method of making a dental floss as set forth in claim 1, wherein the combining step includes twisting the waxed support yarn and composite yarn together.
- 3. The method of making a dental floss as set forth in claim 1 including the step of wetting the core strand before combining with the effect strand.
- 4. The method of making a dental floss as set forth in claim 1, wherein the composite yarn and the waxed support yarn are twisted together from 4 to 8 turns per inch.
- 5. The method of making a dental floss as set forth in claim 1, wherein the composite yarn is a beaded yarn and the distance between beads of the beaded yarn is from 11/4 inch to 13/4 inch.
- 6. The method of making a dental floss as set forth in claim 5, wherein the length of a bead of the beaded yarn is from 3/4 inch to 11/4 inch.
- 7. The method of making a dental floss as set forth in claim 1, wherein the average denier of the composite yarn is between 550 and 650.
- 8. The method of making a dental floss as set forth in claim 7, wherein the average denier of the support yarn is about 200 in the unwaxed condition.
- 9. The method of making a dental floss as set forth in claim 1, wherein the average denier of the composite yarn is about 550-650, the unwaxed denier of the support yarn is about 200, and the total denier of the dental floss is about 750 to 1100.
- 10. The method of making a dental floss as set forth in claim 1, wherein the core strand, the at least one effect strand and the support yarn are textured yarns formed from a polymer selected from the group consisting of nylon, polyester and rayon.
Parent Case Info
This is a division of application Ser. No. 722,881, filed Sept. 13, 1976 now U.S. Pat. No. 4,080,777, issued Mar. 28, 1978.
US Referenced Citations (4)
Number |
Name |
Date |
Kind |
3438194 |
Ceritti et al. |
Apr 1969 |
|
3457715 |
Eldridge et al. |
Jul 1969 |
|
3517498 |
Burrellier |
Jun 1970 |
|
3955952 |
Drummond |
May 1976 |
|
Divisions (1)
|
Number |
Date |
Country |
Parent |
722881 |
Sep 1976 |
|