摘要:
A device for the perforation of a ductile and/or tacky sheet material comprises a frame, pressing tool, a stamp provided with at least one hole, as well as drive means suspended in the frame for causing the pressing tool and the stamp to move toward each other and away from each other respectively. The pressing tool is provided with an end face and the stamp with a die-edge surrounding the die-hole, which can be caused to act cooperatively with the end face of the pressing tool. The lateral dimensions of the end face are greater than the lateral dimensions of the die-edge, whilst the end face comes into contact with the die-edge essentially around the entire periphery thereof, or the end face and the die-edge enclose a gap with a fixed lateral dimension essentially around the entire periphery thereof.
摘要:
Apparatus and method for forming an organized set of plants, this organized set comprising plants of different types in accordance with a predetermined organization. The apparatus comprises a number of first and second pick-up devices for picking up plants, which pick-up devices are displaceable in a first direction. The apparatus is provided with a displacing means for setting a mutual distance between the first and the second pick-up devices in a second direction to a first position and a second position, and a controller. The whole is configured such that at least one first plant and at least one second plant, which have been picked up from a first single row by the first and second pick-up devices, are able to pass each other, thus forming a second row in which the order of the first and second plants differs from that in the first row.