Apparatus for film treatment

Claim 2

In the surface treatment of a plastic body, wherein said surface is exposed to a high intensity voltage in the sonic frequency range accompanied by corona discharge, the improvement which comprises employing as said voltage a series of alternating-directional pulses of electrical voltage produced by energizing a pulse-forming network in which the inductance and capacitance are provided exclusively by the transformer and the load.

Claim 3

In the surface treatment of a plastic body, wherein said surface is exposed to a high intensity voltage in the sonic frequency range accompanied by corona discharge produced by a generator connected through a transformer to the load treatment circuit, the improvement which comprises employing as said voltage a series of alternating-directional pulses of electrical voltage produced by energizing a pulse-forming network in which the inductance and capacitance are provided exclusively by said transformer and said load treatment circuit.

Claim 4

In the surface treatment of a plastic body, wherein said surface is exposed to a high intensity voltage in the sonic frequency range accompanied by corona discharge produced by a generator connected through a transformer to the load treatment circuit, the improvement which comprises employing as said voltage a series of alternating-directional pulses of electrical voltage produced by energizing a pulse-forming network in which the inductance and capacitance are provided exclusively by said transformer and said load treatment circuit.

Claim 5

In apparatus for the surface treatment of a plastic body, employing a generator for delivering, through a transformer to the treatment load circuit, high intensity alternating voltage accompanied by corona discharge, the improvement which comprises employing as said generator first electrical circuit means for providing a unidirectional source of power, second electrical circuit means for providing a trigger signal, and output electrical circuit means, said transformer and treatment load circuit exclusively comprising the inductive and capacitive components of pulse-forming circuit means for producing the high intensity alternating voltage pulses of sonic frequency.

Claim 6

In apparatus for the surface treatment of a plastic body, employing a generator for delivering, through a transformer to the treatment load circuit, high intensity alternating voltage accompanied by corona discharge, the improvement which comprises employing as said generator first electrical circuit means for providing a unidirectional source of power, second electrical circuit means for providing a trigger signal, and output electrical circuit means, said transformer and treatment load circuit exclusively comprising the inductive and capacitive components of pulse-forming circuit means for producing the high intensity alternating voltage pulses of sonic frequency.

Claim 7

Apparatus in accordance with claim 3, wherein interruption means is provided in said second electrical circuit for rapidly disconnecting the supply of trigger signal to said output electrical circuit means.

Claim 8

Apparatus in accordance with claim 4, wherein said interruption means comprises a fast-acting switch.

Claim 9

In apparatus for the surface treatment of a plastic body, employing a generator for delivering, through a transformer to the treatment load circuit, high intensity alternating voltage accompanied by corona discharge, the improvement which comprises employing as said generator output electrical circuit means including sequentially switching thyristor means, electrical circuit means for providing a unidirectional source of power to said output electrical circuit means, and electrical circuit timing means for providing a trigger signal to said output electrical circuit means, said transformer and treatment load circuit exclusively comprising the components of pulse-forming circuit means for producing the high intensity alternating voltage pulses of sonic frequency.

Claim 10

In apparatus for the surface treatment of a plastic body, employing a generator for delivering, through a transformer to the treatment load circuit, high intensity alternating voltage accompanied by corona discharge, the improvement which comprises employing as said generator output electrical circuit means including sequentially switching thyristor means, electrical circuit means for providing a unidirectional source of power to said output electrical circuit means, and electrical circuit timing means for providing a trigger signal to said output electrical circuit means, said transformer and treatment load circuit exclusively comprising the components of pulse-forming circuit means for producing the high intensity alternating voltage pulses of sonic frequency.

Claim 11

Apparatus in accordance with claim 6, wherein interruption means is provided in said electrical circuit timing means for rapidly disconnecting the supply of trigger signal to said output electrical circuit means.

Claim 12

Apparatus in accordance with claim 7, wherein said interruption means comprises a fast-acting switch.

Claim 13

Apparatus in accordance with claim 6, wherein said timing means comprises a rectifier circuit, a timing circuit, an isolation stage, a bistable multivibrator circuit and an output stage.

Claim 14

In apparatus for the surface treatment of a plastic body, employing a generator for delivering, through a transformer to the treatment load circuit, high intensity alternating voltage accompanied by corona discharge, the improvement which comprises employing as said generator first electrical circuit means for providing a unidirectional source of power, second electrical circuit means for providing a trigger signal, and output electrical circuit means including sequentially switching thyristor with self-commutating diode means and a center-tapped output transformer, said transformer and treatment load circuit exclusIvely comprising the components of pulse-forming circuit means for producing the high intensity alternating voltage pulses of sonic frequency.

Claim 15

In apparatus for the surface treatment of a plastic body, employing a generator for delivering, through a transformer to the treatment load circuit, high intensity alternating voltage accompanied by corona discharge, the improvement which comprises employing as said generator first electrical circuit means for providing a unidirectional source of power, second electrical circuit means for providing a trigger signal, and output electrical circuit means including sequentially switching thyristor with self-commutating diode means and a center-tapped output transformer, said transformer and treatment load circuit exclusIvely comprising the components of pulse-forming circuit means for producing the high intensity alternating voltage pulses of sonic frequency.

Claim 16

Apparatus in accordance with claim 10, wherein interruption means is provided in said second electrical circuit for rapidly disconnecting the supply of trigger signal to said output electrical circuit means.

Claim 17

Apparatus in accordance with claim 11, wherein said interruption means comprises a fast-acting switch.

Claim 18

In apparatus for the surface treatment of a plastic body, employing a generator for delivering, through a transformer to the treatment load circuit, high intensity alternating voltage accompanied by corona discharge, the improvement which comprises employing as said generator output electrical circuit means including sequentially switching thyristor with self-commutating diode means and a center-tapped output transformer, electrical circuit means for providing a unidirectional source of power to said output electrical circuit means, and electrical circuit timing means for providing a trigger signal to said output electrical circuit means, said transformer and treatment load circuit exclusively comprising the components of pulse-forming means for producing the high intensity alternating voltage pulses of sonic frequency.

Claim 19

In apparatus for the surface treatment of a plastic body, employing a generator for delivering, through a transformer to the treatment load circuit, high intensity alternating voltage accompanied by corona discharge, the improvement which comprises employing as said generator output electrical circuit means including sequentially switching thyristor with self-commutating diode means and a center-tapped output transformer, electrical circuit means for providing a unidirectional source of power to said output electrical circuit means, and electrical circuit timing means for providing a trigger signal to said output electrical circuit means, said transformer and treatment load circuit exclusively comprising the components of pulse-forming means for producing the high intensity alternating voltage pulses of sonic frequency.

Claim 20

Apparatus in accordance with claim 13, wherein interruption means is provided in said electrical circuit timing means for rapidly disconnecting the supply of trigger signal to said output electrical circuit means.

Claim 21

Apparatus in accordance with claim 14, wherein said interruption means comprises a fast-acting switch.

Claim 22

Apparatus in accordance with claim 13, wherein said timing means comprises a rectifier circuit, a timing circuit, an isolation stage, a bistable multivibrator circuit and an output state.