Patent information:
| Patent: | Utility 1,407,550 |
| Patented: | February 21, 1922 |
| Applied: | September 15, 1919 |
| Title: | Method and Machine for Forming Impressions in Plastic Articles |
| Description: | Threading porcelain by gyrating the thread mandrel (""wobbler"" method) |
| Category: | Thread |
| Assigned to: |
Patentee Information:
| LAPP, John | Rochester, NY |
Class and subclass information:
| Class: | 264 | PLASTIC AND NONMETALLIC ARTICLE SHAPING OR TREATING: PROCESSES |
| Subclass: | 319 | MECHANICAL SHAPING OR MOLDING TO FORM OR REFORM SHAPED ARTICLE; Shaping against forming surface (e.g., casting, die shaping, etc.); Applying heat or pressure; |
| Class: | 425 | PLASTIC ARTICLE OR EARTHENWARE SHAPING OR TREATING: APPARATUS |
| Subclass: | 385 | PREFORM RESHAPING OR RESIZING MEANS: OR VULCANIZING MEANS INCLUDING A CONFORMING PREFORM SUPPORT; Surface deformation means only; |
| Class: | 425 | PLASTIC ARTICLE OR EARTHENWARE SHAPING OR TREATING: APPARATUS |
| Subclass: | 457 | DYNAMIC MALE SHAPING MEANS INCLUDING MECHANICAL MOVEMENT OR POWER MEANS; |
Known specimens:
| Number: |  |
Drawings:
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