Billboard device

Details Billboard device Billboard device

1991-02-22

1993-07-20

Pellinen, A. D.

Electricity: electrical systems and devices

Electric charge generating or conducting means

Use of forces of electric charge or field

296 21, 40593, H02N 1300

Patent

active

052299104

ABSTRACT:
The invention relates to a billboard device suitable for use in posting a sheet of advertisement of guide bill, in particular, on the structure of a vehicle. The billboard device eliminates the necessity of using elastic material such as cardboard for sheets or bills and does not impair the design aesthetics of the bills. The billboard device includes an electrostatic attracting plate which has an attracting layer of dielectric material and at least one pair of comb-tooth shaped electrodes formed on the back surface of the attracting layer. The electrostatic attracting plate is warped so that the attracting layer is concave on the front surface. Voltage is applied to central comb-tooth electrodes first, and then the comb-tooth electrodes surrounding the central electrodes.

REFERENCES:
patent: 2293887 (1942-08-01), Chamberlain
patent: 3359469 (1967-12-01), Levy et al.
patent: 3448356 (1969-06-01), Testone
patent: 3897997 (1975-08-01), Kalt
patent: 3916270 (1975-10-01), Wachtler et al.
patent: 4224557 (1980-09-01), Sasaki
patent: 4225369 (1980-09-01), Felchlin
patent: 4751609 (1988-06-01), Kasahara
European Search Report and Annex.

Affiliated with

Also associated with

Rating

Billboard device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Billboard device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Billboard device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1765409