Browse Prior Art Database

Developer Mix Dumping Apparatus And Method

IP.com Disclosure Number: IPCOM000100496D
Original Publication Date: 1990-Apr-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 5 page(s) / 192K

Publishing Venue

IBM

Related People

Smith, TJ: AUTHOR

Abstract

A xerographic reproduction machine includes a magnetic brush developer having a door assembly located in its bottom wall for use in dumping used developer mix (i.e., toner powder and carrier beads) prior to replacing the mix with a new, unused mixture.

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This is the abbreviated version, containing approximately 52% of the total text.

Developer Mix Dumping Apparatus And Method

       A xerographic reproduction machine includes a magnetic
brush developer having a door assembly located in its bottom wall for
use in dumping used developer mix (i.e., toner powder and carrier
beads) prior to replacing the mix with a new, unused mixture.

      Fig. 1 shows the door assembly which is mounted as a portion of
the developer's bottom wall (not shown).  This figure also shows the
top portion of an empty container into which the mix will dump.  The
container is positioned ready to be coupled to the door assembly.

      Fig. 2 is like Fig. 1, but Fig. 2 shows only the major
operation components of the door assembly.  A developer mix dump door
10 is shown in its closed position.  The top portion 20 of an empty
container into which the developer mix will be dumped is shown,
however, the container itself is not shown.

      Arrows 21 in the various figures represent spring forces which
bias a slider plate and three movable interposers.  Arrow 22
represents the manual insertion force whereby an operator places the
empty container under door 10.

      Door 10 normally closes a dump opening which is located in the
bottom wall of the magnetic brush developer's sump (not shown).  Door
10 is latched closed by virtue of the position of a manually operable
slide plate 11.  In the position shown, the plate engages dogs 12
which are located on the under side of the door.  In the position
shown, interposer 13 is positioned to block forward movement of
slider plate 11.  Thus, accidental opening of door 10, by pushing
forward on handle 14, is prevented.

      The top portion of the container includes a planar, U-shaped
surface 23 which surrounds an opening 24 into which the developer mix
dumps.  Surface 23 connects with a downward sloping cam surface 25.
This cam surface operates to move interposer 13, and the two
interposers 16, against their spring bias forces, as will be
apparent.  Surface 23 also includes locking openings 26 which operate
to receive extensions 17 of interposers 16 when portion 20 has been
fully inserted under door 10 (see Fig. 4).  In this position of
interposers 16, the container is locked to the developer housing.
Door 10 can now be opened (see Fig. 5).  The container cannot be
removed until the container's cover 50 has been placed in position
(see Figs. 6 and 7), as will be apparent.

      The container's top portion 20 also includes a lower planar
surface 27 which...