Abstract: A printing device or coder particularly adaptable for printing data on each of a plurality of articles such as conveyed in a moving production line. The device comprises a holder for preselected type mounted on a rotatable shaft connected through a slip clutch and a drive means to a rotary power means. The drive means is also connected to an ink roll positioned near to the type holder shaft. A pawl, normally urged into engagement with a cam member, holds the type holder in one position as the holder's shaft is allowed to slip momentarily with the clutch and as the type engages an article being printed. Thereafter, a movable trigger disengages the pawl and cam member and releases the type holder, allowing it to rotate into contact with the ink roll during one revolution of the shaft prior to the next printing cycle.

Abstract: Improved filter cake compression apparatus for leaf-type filtration systems is disclosed. Cake compressing diaphragms positioned on each side of each filter leaf are connected by resilient tension members to movable diaphragm support bars positioned peripherally around and perpendicular to the diaphragms and filter leaves. When cleaning of the filter leaves is needed, sets of the support bars are moved longitudinally in opposite directions to cause the diaphragms to move toward the filter leaves to engage the filter cake on both sides of each leaf. Upstream filter pressure and the pull of the connecting tension members cause the diaphragms to compress the filter cake against the filter leaf, and the amount of cake is reduced by squeezing the liquid portion of the feedstock from the cake.