Stencil printer equipped with print image transverse position adjustment means

A stencil printer comprising a frame body, a printing drum, a printing drum carriage means supporting said printing drum to be rotatable around a central axis thereof at a stationary axial position thereof, a means for suspending said printing drum carriage means from said frame body to be movable relative thereto in a transverse direction extending along the central axis of said printing drum between an operating position thereof located inside of said frame body and a dismounting position thereof located outside of said frame body, and a print image transverse position adjustment means acting between said printing drum carriage means and said frame body for adjusting a transverse position of said printing drum carriage means located at said operating position in said transverse direction relative to said frame body,

• wherein said print image transverse position adjustment means comprises:
• a drive means supported from said frame body and having a drive element movable in said transverse direction for positioning said printing drum carriage means, when engaged therewith, in said transverse direction relative to said frame body,
• a print image transverse position instruction means for selectively actuating said drive means in either direction of said transverse direction,
• a latching means for selectively latching said printing drum carriage means to said drive element such that said printing drum carriage means is engaged with and positioned by said drive means in said transverse direction relative to said frame body,
• a latch disengagement instruction means for instructing said latching means for disengagement of said drive element from said printing drum carriage means such that said printing drum carriage means is movable to said dismounting position thereof,
• a standard position detection means for detecting a standard transverse position of said drive element corresponding to a standard transverse position of said printing drum carriage means engaged therewith,
• a bias measurement means for measuring a biasing amount of said drive element from said standard transverse position thereof corresponding to a transverse biasing amount of said printing drum carriage means engaged therewith from said standard transverse position thereof, and
• an operation control means which, when said latch disengagement instruction means is operated for disengagement of said latching means, actuates said drive means to bias said drive element, according to a biasing amount thereof, to a terminal position of biasing thereof in the direction of biasing said printing drum carriage means toward said disengagement position, and then to return said drive element to said standard transverse position thereof, with a simultaneous control of said latching means such that said latching means is disengaged at a moment when said drive element reverses direction of biasing movement thereof.