Patent information:
| Patent: | Utility 1,381,695 |
| Patented: | June 14, 1921 |
| Applied: | December 20, 1920 |
| Title: | Porcelain Tube Heading Machine |
| Description: | Machine for making wall tubes |
| Category: | Wall Tube |
| Assigned to: | |
Patentee Information:
Class and subclass information:
| Class: | 425 | PLASTIC ARTICLE OR EARTHENWARE SHAPING OR TREATING: APPARATUS |
| Subclass: | 392 | PREFORM RESHAPING OR RESIZING MEANS: OR VULCANIZING MEANS INCLUDING A CONFORMING PREFORM SUPPORT; Rod or tubular preform; |
| Class: | 425 | PLASTIC ARTICLE OR EARTHENWARE SHAPING OR TREATING: APPARATUS |
| Subclass: | 441 | SHAPING SURFACE INCLUDING MEANS TO RELEASE OR REMOVE PRODUCT FROM SHAPING SURFACE; By movable mold sections; |
Known specimens:
|
Drawings:
Page 1 |
Page 2 |
|