Resiliently compressible bobbin
US4270710A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 4, 1979 |
| Grant date | Jun 2, 1981 |
| Priority date | — |
| Expiry date | Sep 4, 1999 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06B23/042
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A resiliently compressible bobbin comprising two end rings disposed opposite to one another in a spaced relationship, a plurality of transverse ring frames distributed equidistantly between and in parallel with the end rings and a plurality of straight longitudinal frames interconnecting the end rings and distributed equidistantly around the periphery of the bobbin. The longitudinal frames each have a thickness gradient decreasing radially outwardly, are flush with the end ring's inner and outer peripheral surfaces and are constructed so that portions on opposite sides of a transverse ring frame are gradually increased in thickness toward the transverse ring frame in the same direction, but in opposite directions relative to the portions on opposite sides of the adjacently disposed transverse ring frame, the midportion between transverse ring frames being narrowed. The longitudinal frame portions that extend on opposite sides of a transverse ring frame adjacent to the end ring or a transverse ring frame located every two frames from a frame ring adjacent an end ring are bent to define jointly a V-shape. The bobbin bends in a regular, definite direction upon compression and can be w…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.