Browse Prior Art Database

HIGH CURRENT COROTRON WITH PHOTORECEPTOR PROTECTION

IP.com Disclosure Number: IPCOM000022952D
Original Publication Date: 1976-May-31
Included in the Prior Art Database: 2004-Mar-27
Document File: 2 page(s) / 200K

Publishing Venue

Xerox Disclosure Journal

Abstract

In corona apparatus 1, particularly of the high current unshielded or open shield wire type, or where the shield 2 is spaced further than normal from the wire 3 and photo~ receptor plate 4, undesirable sparking from the wire 3 may be to the plate 4, rather than to the shield 2, causing plate damage, It is proposed to solve this problem by positioning a grounded metal surface closer to the corona wire 3 than the plate 4. This could be a separate metal rod or piece 5, an indention or dimple 6 in the corona shield, or an annular lip or protrusion 7 from the edge of the photoreceptor which is closer to the wire than the rest of the plate 4. Any or all of these create a pre~ ferential (shorter) spark discharge path to a grounded surface to protect the imaging surface area of the photo~ receptor. The grounded metal surface area should be small enough not to draw a substantial normal corona current from the wire,

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

HIGH CURRENT COROTRON WITH
PHOTORECEPTOR PROTECTION Charles F. Gallo

Proposed Classification

ti,s, ci, 317/4 mt. Cl, H05b

In corona apparatus 1, particularly of the high current
unshielded or open shield wire type, or where the shield
2 is spaced further than normal from the wire 3 and photo~
receptor plate 4, undesirable sparking from the wire 3 may
be to the plate 4, rather than to the shield 2, causing
plate damage, It is proposed to solve this problem by
positioning a grounded metal surface closer to the corona
wire 3 than the plate 4. This could be a separate metal
rod or piece 5, an indention or dimple 6 in the corona
shield, or an annular lip or protrusion 7 from the edge of
the photoreceptor which is closer to the wire than the
rest of the plate 4. Any or all of these create a pre~
ferential (shorter) spark discharge path to a grounded
surface to protect the imaging surface area of the photo~
receptor. The grounded metal surface area should be small
enough not to draw a substantial normal corona current
from the wire,

2/1

7~

4

Volume 1 Number 5 May 1976 55

[This page contains 1 picture or other non-text object]

Page 2 of 2

56 XEROX DISCLOSURE JOURNAL

Volume 1 Number 5 May 1976

[This page contains 1 picture or other non-text object]