Method of Making Cocoons with a Sounding Object, US Patent No. 3994259
Sample pages
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US Patent 3,994,259 (Tomohiko Sakamura, granted 30 November 1976) describes a method of having silkworms form cocoons around a sounding object such as a small bell. A hole is made in the cocoon early in spinning, the object is inserted, the nest is rotated so the object does not stick, and the hole is closed over by the worm. A second method colors the cocoon by applying dye to the silkworm's breathing holes near the silk glands during the fifth larval stage. The document includes the patent claims, the description with a worked dyeing example, and drawings of the silkworm life cycle and production steps. Both a web-printed text version and the original patent pages are included.
- Type
- Patent
- Date
- November 30, 1976
- Language
- English
- Pages
- 15
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From Ralph Griswold's Digital Archive, delivered by the University of Arizona.
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