Crystal

The CRYSTAL 640 SF Press is designed to apply Hot Stamping Foil and Holographic Hot Stamping Foil on to sheets of paper and other media.

The base unit is a Heidelberg KSD press. The best available quality unit is purchased at the time of order confirmation, before a comprehensive renovation and conversion is completed. Heidelberg manufactured the KSD press until 1980 and the exact year of manufacture of the base press being converted is only known at the time it is purchased. The renovated Heidelberg KSD press is converted to a security press in stages as follows:

• Modifications to the renovated base unit
• Replacement bed assembly
• Foil control system
• Electrical system
• Control system
• Guarding system

The assembly of this unit uses newly manufactured components which are tested, reliable and of good quality.

The foil control system comprises a foil tray mounted on the end of the bed near to the cylinder incorporating several dividing plates which position the foil in its correct position and also create a line tension for the foil which is maintained from the maximum roll to an empty one. The foil tray is made from 2 mm passivated steel with an easy release lid to gain full access. It has a capacity for up to 8 foil rolls. An additional full width foil bar can be located in the foil tray, this has location and tensioning collars fitted along the shaft for optimum foil control when using narrow width foils. The complete foil tray assembly is purpose built to suit the Heidelberg Press.

Foil movement is activated by the modular foil pull through unit mounted on the opposite end of the bed to the foil tray. This foil pull-through unit is built up of a combination of nip rollers which will comprise 2 full width units. Each foil rewind is micro-processor controlled to allow three different pull lengths with up to 99 repeats of each length per program.

The nip rollers are turned by means of precision stepper motors which can achieve a pull resolution of 0.1 mm which is essential for accurate foil usage. A foil counter can be set to monitor the foil usage and, when exhausted, will automatically stop the Press. Foil pull velocity is automatically minimised for optimum foil control. The waste foil is collected by a trash shaft mounted directly above the nip rollers. The trash shaft utilises a disposable foil core which makes trash collection and disposal fast and efficient. The speed of the foil is automatically minimised offering excellent foil control and minimum foil wastage.