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| Number | Title | Issue Date |
| 4457637 | Squeeze printing mechanism A printer is fitted with a squeeze printing mechanism employing a toggle or over-the-center crank mechanism to provide direct pressure to a printing element for accurate impression depth control during imprinting and for achieving low velocity at the time... | 07/03/1984 |
| 4227456 | Printing pressure buffer mechanism or constant pressure printing mechanism for hand-operated label printing machine In a hand-operated label printing machine, including a hand lever and a printing head attached to the hand lever; a printing pressure buffer mechanism or a constant pressure printing mechanism which comprises: in a first embodiment, a spring-actuated enga... | 10/14/1980 |
