Rockable photographic tray having a substantially flat interior sheet support
US4138689A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 7, 1976 |
| Grant date | Feb 6, 1979 |
| Priority date | — |
| Expiry date | Sep 7, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03D13/04
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photographic tray having inwardly turned upper edges, ribs along the lower surface thereof for making the tray more rigid and upwardly sloping bottom surface portions on which the tray may be rocked to agitate a liquid located therein is fabricated as a single, unitary structure by blow molding techniques. The tray is also provided with a pouring spout and with a specially designed molded-in portion for resting a thermometer in the tray so that it will not be dislodged or otherwise inadvertently moved. The tray is fabricated as a closed container by blow molding, and a major surface is then cut off, for example, by sawing, routing, or any other suitable method to arrive at the resultant tray.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.