View Original: | US114945 - Patents for Injection Moulding by John Wesley Hyatt (Diagram 2).png (3270x2069) | |||
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Keywords: US114945 - Patents for Injection Moulding by John Wesley Hyatt (Diagram 2).png en The figures shows how the injection moulding works Celluloids are filled in the chamber beneath the screw The syringe apparatus pushes the celluoids into the mould and filling it The results are the billard balls made of celluloids to replace the ivory materials 1871-05-16 USPTO John Wesley Hyatt other versions PD-old-70-1923 Injection moulding Patent drawings |