Compagnie Generale D'automatisme

Gerard Nourigat

Michel Jacoub

Stephane Estrabaud

The invention comes within the field of equipment control. A method of shifting a moving unit from a first position to a second position by means of a stepping motor driven by a finite sequence of pulses, said moving unit being liable to oscillate about its equilibrium point, characterized in that as a function of the period and of the damping factor of the oscillation, the time intervals which separate said pulses are chosen so that the last pulse is applied to the motor at an instant when the oscillation resulting from the set of preceding pulses brings the moving unit substantially to the required final position and reduces its speed substantially to zero. It applies in particular to disc-type printers.

Method of positioning a moving part and a printer operating in

The invention relates to magnetic recording. A method of superposing a modifiable magnetic code on a fixed bar code magnetizes the bars in two different directions by means of a write head. There is the provision for synchronising the application of write signals to the write head with the passage of the bars of the bar code and the system may include a bar code reading head which reads a code moved by a conveyor belt and which causes an image of the bar code to be stored in a shift register with each bar and each space of the bar code being represented by several successive 1's or 0's. The write head then includes a read winding which triggers (via) reading of the image, and the image is gated into a code generator that writes when an image bar is present thereby writing magnetically onto the real bars of the bar code.

Growing community of inventors

St. Remy les Chevreuse, France

Gerard Nourigat