| 摘要 |
A working head for a so called passepartout-machine by means of which rectangular cuttings and/or impressions can be made in a plain material and which is formed with a knife (6) or an impression roller which is mounted in a holder (30) which is connected to a rotatable housing (5) for being lifted and lowered. A pressure roller (7) adapted to be in contact with the plain material is like wise connected to the rotatable housing (5) for being lifted and lowered. The rotatable housing (5) is fixed connected to a central shaft (2) at the upper end of which a Maltese cross (14) is mounted and which by engagement with a cam disc (9) having a pin (10) and provided on a driving shaft (1) for the Maltese cross (14) can be rotated intermittently, so that the central shaft (2) is rotated one fourth of a turn when the driving shaft (1) is rotated a full turn. The Maltese cross (14) has recesses (16) for a movable locking wedge (34) which locks the central shaft (2) after the rotation. The locking wedge (34) is a part of a catch (33) made of several pieces.
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