Did You Know...
...that the inventor of the electric motor was a blacksmith named Thomas Davenport? Described as "a brilliantly unsuccessful inventor", Davenport invented the first rotary electric motor. In 1836 he headed out -- on foot -- from his Vermont home to file a patent application at the Patent Office in Washington, D.C. By the time he got there, he had squandered away his money and couldn't afford the $30 filing fee so he turned around and went home. When he later mailed in his application with money he'd raised, the Patent office was destroyed in a fire. He did finally get credit for his invention on Feb. 5, 1837.
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| Number | Title | Issue Date |
| 4015522 | Multicolor sheet-fed printing press A sheet-fed printing press installation comprised of a first press unit for printing on one side of a sheet and which is coupled by a chain type conveyor to a second press unit in which there is a transfer drum having a normal set of grippers and an auxil... | 04/05/1977 |
| 4014261 | Conversion device of a storage drum for sheet transfer An assembly of a sheet transfer drum, a sheet-turning drum and a storage drum mounted on a shaft and located therebetween for transporting a sheet between individual printing units of a rotary printing press, includes a change-over mechanism for convertin... | 03/29/1977 |
| 3992993 | Sheet transfer system for a printing machine A printing machine has an upstream and a downstream printing station each provided with a printing roller. A sheet transfer roller is located between the stations for transferring sheets from the printing roller of the upstream station to that of the down... | 11/23/1976 |
| 3946669 | Printing arrangement alternatively operated for one-side printing and two-side printing with control system therefor In first and second modes, the arrangement prints on only one side or on both sides of a sheet, respectively. A sheet is transported along a predetermined path through the arrangement and passes printing devices cooperating to effect printing of the sheet... | 03/30/1976 |
| 3944218 | Sheet transfer cylinders The present invention provides a sheet transfer cylinder for a rotary printing machine and has associated therewith a mechanism for gripping the sheets to be transferred and for turning same. The transfer cylinder is rotatably mounted in the side walls of... | 03/16/1976 |
