Dek International Gmbh

Dtg International Gmbh

Frank Norman Squibb

Ian Patrick McEvoy

A screen printing apparatus and method for printing deposits of material onto a workpiece, the apparatus comprising an inspection station for determining a positional relationship of features on upper and lower surfaces of the workpiece. The inspection station comprises an imaging system for determining a positional relationship of features on upper and lower surfaces of the workpiece. The imaging system comprises at least two spaced imaging units for imaging features on an upper surface of the workpiece and at least two spaced imaging units for imaging features on a lower surface of the workpiece. A processing unit determines a positional relationship of the imaged features on the upper and lower surfaces of the workpiece. A printing station prints deposits of material onto the workpiece. Also described are a transport mechanism and an alignment system.

Screen printing apparatus

A viewing and imaging system is provided for use in a screen printer. Light is supplied to the screen and/or the board from a number of independently controller light sources. According to one aspect of the invention, one light source provides substantially collimated light and another light source provides diffuse light. The light sources are controlled by a controller that pulses the light sources in order to provide a stroboscopic image of the board and screen. The duration of the pulses is adjusted to adjust the effective brightness of the light sources. The timing of the pulses are adjusted so that the temporal midpoints of pulses from each of the light sources are coincident.

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Dorset, United Kingdom

Frank Norman Squibb