Heidelberger Druckmaschinen Ag

Dorina Nahmaschinen Gmbh

Pfaff Haushlatmaschinen Gmbh

Gunter Meier

Helmar Holl

Petra Rapke-Kraft

Tilo Löffler

An operating system for a printing machine includes a graphic operating interface for allowing the printing machine to be controlled by actions of an operator. Electronic documentation is selectively displayable on the operating interface as a result of actions by the operator. The electronic documentation includes operating instructions, a spare-parts catalog containing numbers and drawings of spare parts, and maintenance instructions. The operating system also includes a list with links between electronic addresses of electronic components in the printing machine and the spare-parts numbers and/or drawings. When the operating system receives a report of a fault in an electronic component through the electronic address thereof, it refers to the fault on the operating interface and, in response to an action by the operator, displays the associated spare-parts numbers and/or drawings on the operating interface. A method of updating the operating system is also disclosed.

Operating system for a printing machine, and method of updating the operating system

Overcast sewing machine for forming a multiple-thread overcast seam

A sewing machine has a housing with a needle supported therein for reciprocation upon rotation of a main shaft to move the needle into and out of engagement with a workpiece which is fed by a feed mechanism which is driven from the main shaft. The feed means is such that the material is moved in a plurality of steps while the needle is out of engagement with the workpiece. The feed includes a workpiece support arm which has one end which is pivoted on a slide drive for effecting back and forward movement of the workpiece support arm which includes a feed dog engagement part which engages the workpiece to advance it. An eccentric portion driven from the main shaft provides for the upward and downward movement of the support arm. The transmission and timing of the feed drive is such that the support arm is movable to impart movement to the feed dog engagement portion for the workpiece through the support arm in either four movement cycles in respect to one needle moving cycle, two successive ones of which take place as the needle is moved out of the workpiece and only two take place during the lifting movements of the support arm by the eccentric; or three movement cycles in respect to one needle movement cycle in which the engagement part is given a lifting movement only during two movements in the feed direction during the time the needle is out of the base plate. Drive transmission between the main shaft and the slide drive shaft has a ratio of 1 to 4 and the ratio between the main shaft and the eccentric lifting shaft is 1 to 1 which is effected by a lifting eccentric which carries two cams which are offset either by 90.degree. or 120.degree..

Sewing machine with a feed device

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Karlsruhe, Germany

Gunter Meier