U.S. Philips Corporation

Marcellis H Driessen

Nicolaas G Vink

Adriaan J Groothoff

Willem Lock

Adrianus M Habraken

A method is described for injection-moulding a product by means of the so-called gas-injection method. A special feature of the method is that in addition to the injection of gas into the product cavity (10) via a first gas inlet (51), gas is injected into a spill cavity (20) via a second gas inlet (52). The amount of material (1) flowing from and toward the spill cavity (20) can be controlled by the location of the second gas inlet (52). Moreover, a variant of the method prevents the formation of so-called dead ends. By means of another variant of the method in accordance with the invention it is possible to prevent the occurrence of so-called flow lines.

Method for injection-moulding a hollow product using a pressure

In a television deflection device which is mounted on a color cathode ray tube, a frustoconical supporting member (3) has a pair of coil halves (6) and (7) which form horizontal deflection coils halves. These coils have longitudinal portions (11, 12, 14 and 15) which extend to the front and the rear of the supporting member (3), an elongate tapered spacer (17) and (18) being inserted in the spaces between adjacent longitudinal portions of these coils. Movements of the spacers (17) and (18) adjust the space between the longitudinal portions which provides mechanical means for correcting for asymmetries in the display device.

Growing community of inventors

Eindhoven, Netherlands

Marcellis H Driessen