Title:
EQUIPMENT FOR MAKING SMALL PORES IN SHEET BELT MATERIALS
Document Type and Number:
Japanese Patent JPS5515198
Kind Code:
A
Abstract:
Arrangement for effecting the superfine perforation of film-like sheeting with the aid of high-voltage pulses. The sheeting to be perforated is permitted to pass in a contactless manner between two areal electrode fields. The electrode fields consist of a multitude of needles which are aligned to one another in a mirror-inverted manner and arranged in rows, with each time pairs of them forming discharge or sparking gaps. The needles of the first electrode field are in a direct conductive connection with each time one high-ohmic resistor. Each needle pair is arranged within the secondary circuit of an ignition transformer. These transformers have a high transformation ratio. On the primary side, the transformers are connected via transistor switches, to a source of low d.c. voltage. The transistor switches are initiated groupwisely via a distributor (ring counter) which, in turn, is controlled by a clock-pulse generator.
Inventors:
KURAUSU PEETAA SHIYUMITSUTO KU
GERUHARUTO FUERUTO
GERUHARUTO FUERUTO
Application Number:
JP8656479A
Publication Date:
February 02, 1980
Filing Date:
July 10, 1979
Export Citation:
Assignee:
SCHMIDT KUFEKE K P
FELD GERHARD
FELD GERHARD
International Classes:
B26F1/28; (IPC1-7): G02B15/16
Foreign References:
| DE2817390A1 | 1978-10-26 |