Bezel assembly and method of production

A group of identical bezel plates having bilateral symmetry interchangeable, in a compound bezel assembly, with at least one other group of identical bezel plates having bilateral symmetry to produce multiple, bilaterally symmetrical, compound bezel configurations with different appearances using a minimal number of component plates; and method and apparatus for providing a venting bezel assembly with a plenum chamber formed between component plates.

FIELD OF THE INVENTION
 The present invention relates generally to the production of bezel
 assemblies and, more particularly, to the cost effective production of
 multiple bezel assemblies with different appearances through the use of
 interchangeable component plates.
 BACKGROUND OF THE INVENTION
 Many devices used in the computer, telecommunications, electronics and
 other industries are mounted in sheet metal housings which are in turn
 mounted in a vertical rack assembly. Rack mounts have long been used in
 electronics instrumentation applications to mount housings containing
 various instruments such as voltmeters, signal generators, oscilloscopes,
 and power supplies. The telecommunications and networking industry often
 mount switching assemblies and other components in rack mounted housings.
 Examples of rack mounted housings applications in the home electronics
 industry include stereo components and home entertainment center audio and
 video components. In the computer industry computers and computer
 peripherals including mass storage devices such as tapes, optical disks,
 CD-ROMs, DVDs are provided in rack mounted sheet metal housings. Sheet
 metal housings are also used to house peripheral devices such as DVD
 drives which are fixedly or removable mounted in bays within a larger
 computer housing.
 In rack mounted housings, and some other types of housings as well, an
 assembly known as a "bezel assembly" or simply "bezel" is attached to the
 front face of the housing. In some cases the bezel has no function other
 than to provide a "finished" appearance to the portion of the housing
 which is visible to users. In other cases the bezel may contain an
 opening, such as for insertion or removal of media, control knobs or
 buttons, viewable displays or other functional features. However even with
 such functional bezels, the appearance of the bezel is usually considered
 very important to the organization which markets the associated product.
 In many cases the bezel is the only feature of the product which the end
 user actually sees.
 In many industries one company, generally referred to as an "original
 equipment manufacturer" or "OEM", manufactures a particular product which
 it sells to other companies. Each of these other companies subsequently
 sells the product under its own trademark or brand name, either to
 distributors or directly to end users. In such cases the company selling
 to the distributors/end users may require the OEM to provide visual
 marking that identifies the product with the company selling to
 distributors/end users. For products sold in housings, this identifying
 visual marking is often provided by customizing the housing's bezel.
 However, producing customized bezels for its different customers typically
 significantly increase an OEM's manufacturing costs. If the OEM simply
 sells the same identical product to each of its customers it is able to
 maintain relatively low production costs since the same machinery, tooling
 and production steps may be used for producing all of the products. If the
 OEM produces a customized bezel for each of its customers, separate bezel
 tooling must be created for each customer and, depending upon the bezels,
 special assembly techniques and/or components may be required as well.
 It would be generally desirable to provide a bezel assembly of a type which
 may be efficiently and inexpensively produced in a plurality of different
 configurations, each having a unique appearance.
 SUMMARY OF THE INVENTION
 The present invention is directed to a method and apparatus for producing
 multiple bezel assemblies having different appearances.
 Thus the invention may comprise a bezel assembly for a modular rack mounted
 device comprising a unitary central plate having a central longitudinal
 plane extending parallel to its lateral side face portions. The central
 plate is symmetrical about the central longitudinal plane. The bezel
 assembly includes a first side plate having a central longitudinal plane
 extending parallel to its lateral side face portions, and having a central
 lateral plane extending parallel to its top and bottom face portions. The
 first side plate is bilaterally symmetrical about at least one of the
 central planes thereof and is disposed with one of the lateral side face
 portions thereof in adjacent relationship with a first lateral side face
 portion of the central plate. The bezel assembly includes a second side
 plate identical to the first side plate having a central longitudinal
 plane extending parallel to its lateral side face portions, and having a
 central lateral plane extending parallel to its top and bottom face
 portions. The second side plate is bilaterally symmetrical about at least
 one of the central planes thereof and is disposed with one of the lateral
 side face portions thereof in adjacent relationship with the second
 lateral side face portion of a central plate.
 The invention may also comprise a method of producing housing assemblies
 including:
 a) providing a plurality of identical housing frames;
 b) providing a plurality of identical central bezel plates each being
 bilaterally symmetrical about a plane of symmetry;
 c) providing a plurality of first identical side plates, each having a
 front face portion with a first front surface configuration, first and
 second parallel lateral side face portions and each being bilaterally
 symmetrical about a plane of symmetry;
 d) providing one or more other sets of identical side plates including at
 least a plurality of second identical side plates, each having a front
 surface configuration different from said the front surface configuration
 of the first side plates and each being bilaterally symmetrical about a
 plane of symmetry;
 e) mounting pairs of the plurality of identical first side plates on
 individual ones of the plurality of identical housing frames with one of
 the identical central plates disposed between each of the pairs of first
 side plates in a plate arrangement which is bilaterally symmetrical about
 the plane of symmetry of the central plate to provide a plurality of
 housing assemblies having a first bezel configuration;
 f) mounting pairs of the plurality of identical second side plates on
 individual ones of the plurality of identical housing frames with one of
 the identical central plates disposed between each of the pairs of second
 side plates in a plate arrangement which is bilaterally symmetrical about
 the plane of symmetry of the central plate to provide a plurality of
 housing assemblies having a second bezel configuration.
 The invention may also comprise a bezel assembly including a first plate
 and a second plate each having at least one vent passage extending
 therethrough. The second plate is mountable in overlying peripherally
 abutting relationship with the first plate with at least one interior
 portion thereof positioned in spaced relationship with an oppositely
 positioned portion of the first plate. A plenum chamber is formed between
 the first and second plates with the vent passages in the first and second
 plates being in fluid communication with the plenum chamber. The plenum
 chamber obviates aligning the vent passages of the two plates to pass air
 through the two plate assembly.

DETAILED DESCRIPTION OF THE EMBODIMENTS
 The drawing FIGS. 1-23, in general, illustrate method and apparatus for
 producing a plurality of different bezel assemblies 28 for housing modules
 10. Such different bezel assemblies 411, 461, and 501 are shown in FIGS.
 1, 23 and 22, respectively. The components of each bezel assembly include
 a plurality of identical central plates 270, FIG. 12, each being
 bilaterally symmetrical about a plane of symmetry 271 and having first and
 second lateral side face portions 292, 294 extending generally parallel to
 the plane of symmetry 271. Also included is a first plurality of identical
 side plates 410, FIG. 19, each having a front face portion 412 with a
 first front surface configuration, first and second parallel lateral side
 face portions 434, 436 and each being bilaterally symmetrical about a
 plane of symmetry 440 whereby a first one of the first plurality of
 identical side plates 410 is positionable with one of the lateral side
 face portions 434, 436 thereof in adjacent parallel relationship with the
 first lateral side face portion 292 of one of the central plates 270 and
 another of the first plurality of identical side plates 410 is
 positionable with one of the lateral side face portions 434, 436 thereof
 in adjacent parallel relationship with the second lateral side face
 portion 294 of the central plate 270 to provide a first three plate bezel
 configuration 411, FIG. 1, which is bilaterally symmetrical about the
 plane of symmetry 271 of said central plate 270.
 The components also include a second plurality of identical side plates
 460, FIG. 20, each having a front face portion 462 with a second front
 surface configuration different from the first front surface
 configuration. The second plurality of identical side plates 460 each have
 first and second parallel lateral side face portions 463, 465 and are
 bilaterally symmetrical about a plane of symmetry 484 whereby a first one
 of the second plurality of identical side plates is positionable with one
 of the lateral side face portions 463, 465 thereof in adjacent parallel
 relationship with the first lateral side face portion 492 of one of the
 central plates 270 and another of the second plurality of identical side
 plates 460 is positionable with one of the lateral side face portions 463,
 465 thereof in adjacent parallel relationship with the second lateral side
 face portion 294 of the central plate 270 to provide a second three plate
 bezel configuration 461, FIG. 23, which is bilaterally symmetrical about
 the plane of symmetry 271 of the central plate 270 and which is different
 in appearance from the first three plate bezel configuration 411.
 Having thus described method and apparatus for forming multiple bezel
 assemblies in general, various components and subassemblies thereof will
 now be described in further detail.
 FIG. 1 illustrates a standard rack frame 10 well known in the art having a
 top wall 12 a pair of side walls 14,16 and an open front face 18. Rack
 frames of this type are available under the product designation HP Rack
 System/E41 from Hewlett-Packard Company. A plurality of ribs 20, 22 or
 other bracket like components and screw holes 24, 26, etc. and the like
 enable sheet metal housings module units 30, FIGS. 2 and 3 to be mounted
 in stacked relationship within the rack frame 10. Rack frames may be
 provided in various heights to accommodate different numbers and sizes of
 housing units. For example, the rack assembly 10 illustrated in FIG. 1 is
 shown having three housing units stacked therein with open space below for
 the mounting of additional housing units of the same type or different
 types. Each of the three housing units positioned in rack 10 have an
 identical bezel assembly 28 mounted thereon which covers the front of the
 housing 30 and the front edge portion 29 of the rack frame 10.
 FIGS. 2, 3 and 5 illustrate a parallelepiped shaped (box shaped) housing 30
 of a data storage media autochanger. The housing 30 has a top wall 32, a
 bottom wall 34 and lateral side walls 36, 38. As shown in FIG. 5 the
 housing 30 has a front wall 42 with left, central and right front wall
 opening 41, 43, 45 respectively, provided therein. As illustrated in FIG.
 3 the housing comprises a rear wall 44 having rear wall openings 46, 48,
 50. Each of the front and rear walls of the housing comprise a plurality
 of cutouts 47, 49, etc. and screw receiving bores 53, etc. provided
 therein.
 As best illustrated in FIGS. 2 and 3 each of the housings 30 have mounted
 therein two identical media holding drawers 54 with slots 56, 58, etc.
 therein for receiving and holding data storage media 60, 62, etc. such as
 tape cartridges, optical disk cartridges, CD ROMs, DVDs, etc. The media
 60, 62 are moved into and out of slots 56, 58 in the directions indicated
 at 64 by a picker assembly (not shown) such as described in detail in U.S.
 patent application Ser. No. 09/137,350 filed Aug. 20, 1998 for MODULAR
 DATA STORAGE SYSTEM of Joseph White, Matthias Lester and Dave Jones,
 Attorney Docket No. 10971954-1 which is hereby incorporated by reference
 for all that is disclosed therein. The housing 30 may comprise a plate 66
 in its top wall if it is used as the upper most housing in the rack. When
 the housing is disposed below the top housing, plate 66 is removed. The
 bottom wall has a similar bottom wall plate (not shown) in aligned
 relationship with plate 66 which remains in place if the housing 30 is the
 lower most housing in the stack. Otherwise the bottom housing plate is
 removed. As described in detail in the above referenced patent application
 of White et al. a picker assembly may move vertically between the housings
 units 30 of the stacked array in one autochanger embodiment. In other
 autochanger embodiments each of the housings units 30 may have a picker
 assembly which accesses data media only within that single housing. A rear
 portion 68 of the housing may have media drives (not shown) mounted
 therein which may also be accessed by the picker assembly.
 Each media drawer 54, FIGS. 2 and 3, has a front end portion 72 on which is
 mounted, as by brackets, screws, clips, or any other attachment means a
 bracket 74. The bracket 74, FIG. 4, has a bottom wall portion 76, a
 central wall portion 78, and two lateral sidewall portions 82, 84. The
 central wall portion 78 has a plurality of holes 92, 94, 96, 98, 102, 104,
 106, FIG. 7, provided therein. The holes may be rectangular in shape, each
 having lateral edge portions 91, 93 and top and bottom edged portions 95,
 97.
 Attachment of a drawer bezel assembly 140 to bracket 74 is facilitated by a
 snap-on attachment plate 110 shown in FIGS. 4 and 8. The snap-on plate 110
 has a large central cutout 112 with partially rectangular upper corner
 portions 114, 116 and has lower rectangular shaped cutouts 118, 120.
 Cutout portions 114, 116, 118, and 120 receive projecting portions of the
 drawer plate therethrough as described in further detail below. Large
 cutout 112 defines a locking portion 122 having an upper surface 124
 connected at 123 to a downwardly and inwardly sloping surface 126 and has
 a lower surface 127. A tab 128 projects forwardly from the plate 110 and
 may be provided at an upper portion thereof.
 Drawer bezel assembly 140, FIGS. 2-4, 6-8 and 19-21, comprises a drawer
 attachable plate portion 142, best illustrated in FIG. 9, and a removable
 plate portion 144, shown from the top and rear in FIGS. 10 and 11. The
 drawer attachable plate portion 142 comprises a rear face portion 146,
 FIG. 4, having bores 148, 150, etc. therein, FIG. 9 for attaching
 removable plate portion 144 as with screws 152. Drawer attachable plate
 portion 142 has raised surface portions 154, 156 adapted to abut the
 forward face of bracket 74 central wall portion 78. A plurality of
 rearwardly projecting stud portions 161-166 are provided at the rear
 surface 160 of plate portion 142. Each stud portion comprises a lip
 portion 170 having an inwardly positioned vertical surface portion 172
 extending generally parallel to surfaces 154 and 156 and positioned
 rearwardly (outwardly) 174 thereof. The distance in direction 174 between
 surface 172 and surfaces 154, 156 is just slightly greater, e.g., 0.5
 millimeters greater than the combined thickness of bracket 74 central wall
 portion 78 and plate 110 which may have thicknesses of e.g., 1.4 mm and
 1.4 mm respectively. Each lip portion 170 has lateral side surfaces 171,
 173 which are separated by a distance smaller, e.g., 2.2 mm smaller, than
 the distance between lateral edges 91, 93 of the holes 92, 94, etc. in
 bracket 74 central wall 78, FIGS. 6 and 7. Similarly, each lip 170
 comprises top and bottom surfaces 175, 177 which are separated by a
 distance somewhat less than, e.g., 5.2 mm less than, the distance between
 top and bottom edges 95, 97 of the holes 92, 94, etc. in bracket 74. This
 size relationship between lip portions 170 and rectangular cutouts 92, 94,
 etc. enables a floating relationship between the bracket 74 and the drawer
 bezel assembly 140 which facilitates registration with a chin plate as
 explained in further detail below. Also, an upper recessed horizontal
 surface portion 169 extending parallel to and recessed, e.g., 2.5 mm from
 surface 175 limits downward displacement of plate 110 as described further
 below.
 The drawer attachable plate portion 142 of the drawer bezel assembly 140
 also has projecting from the rear surface thereof a deflectable member
 portion 176 which is adapted to be deflected in direction 178 by snap-on
 attachable plate 110 downwardly and inwardly sloping surface 126 and to
 thereafter elastically return in direction 179 to lock snap-on attachment
 plate 110 in position as described in further detail below. The
 deflectable member portion 176 has a bottom edge surface 182 which engages
 surface 124 of locking plate 110 when the locking plate is in the locked
 position illustrated in FIG. 8 and further described below.
 FIG. 9 is a front perspective view of drawer bezel assembly drawer
 attachable plate portion 142. Plate portion 142 has a lower more forwardly
 projecting portion 184 having a rectangular shaped front face portion 185,
 a bottom face portion 186, a top face portion 188 and first and second
 lateral side face portions 190, 192 respectively. A lock opening 194 may
 be centered in portion 184 for receiving a lock assembly 195, FIG. 21
 which co-acts with structure (not shown) inside the housing 30 to lock the
 media drawer when the lock assembly is suitably actuated as with a
 conventional key. The drawer attachable plate portion 142 may comprise an
 upper, less forwardly projecting portion 208, which may be integrally
 formed with portion 184 and which may have one or more vent openings 209,
 211, etc. extending therethrough. Upper portion 208 may comprise a top
 face portion 212, lateral side face portions 214, 216 which may be
 laterally recessed, e.g., 3.8 mm, from side faces 190, 192. Upper portion
 208 may also comprise a rectangular shaped front face portion 210 which
 may be recessed rearwardly, e.g., 8 mm, from front face portion 185.
 FIGS. 4 and 6-8 illustrate the manner by which drawer attachable plate 142
 is attached to drawer bracket 74. FIG. 6 is a rear elevation view of plate
 portion 142 prior to engagement with drawer bracket 74. In FIG. 7 plate
 portion 142 has been positioned with the rearwardly projecting stud
 portions 161-166 thereof extending through the openings 92, 94, 96, 98,
 102, 104 of drawer bracket 74. The bracket central wall 78 is positioned
 in abutting engagement with raised surface portions 154, 156 of drawer
 attachable plate portion 142. Next, locking plate 110 is positioned as
 illustrated in dashed lines in FIG. 8 with cutout portions 114, 116, 118,
 and 120 receiving stud portions 161 through 164 therethrough and with stud
 portions 165, 166, positioned below edge surfaces 130, 132. Next, as shown
 in FIG. 8, the plate 110 is urged downwardly, 220, as by pushing on tab
 128 from the position shown in dashed lines to the position shown in solid
 lines. During this downward movement the downwardly and inwardly sloping
 surface 126 of the snap-on attachment plate 110 engages the lower portion
 of plate 142 deflectable member 176 urging it in direction 178 until it
 clears the tip 123 of locking portion 122, which corresponds with the
 engagement or near engagement of surfaces 115, 117, 119, 121, 130, and 132
 with upper recessed horizontal surface portion 169, FIG. 4, of each of the
 stud members 161-166. In other words, plate 110 is captured with respect
 to vertical 220, 221 movement between an abutting surface 182 of
 deflectable member 176 and abutting surfaces 169 of stud members 161-166.
 Once positioned, as illustrated in solid lines in FIG. 8, the attachment
 plate 110 is also captured with respect to forward or rearward 174, FIG.
 4, displacement. It is prevented from being removed in direction 174 by
 the abutting engagement between the rear vertical surface portion 172,
 FIG. 4, of each lip portion 170 and the flat face surface 111 of snap-on
 plate 110. In order to remove the snap-on plate 110 it is necessary for a
 user to move deflectable member portion 176 in direction 178 until it
 clears tip 123, FIG. 4, and thereafter to slide snap-on attachment plate
 110 upwardly, 221, to a position where the plate is no longer engaged by
 the rear surface portion of the lip portions 170 of studs 161-166.
 Thereafter, the plate 110 may be moved rearwardly to remove it from the
 studs. Next, the drawer attachable plate portion 142 may be moved upwardly
 221 with respect to the bracket plate 74 to position the upper edges 95 of
 holes 92, 94, etc. above the lip portions 170 of the stud portions.
 Finally, the drawer attachable plate portion 142 may be moved rearwardly,
 174, FIG. 4, with respect to the bracket 74 to entirely remove it
 therefrom.
 It will be appreciated from the above description that, even though the
 attachment plate 110 is prevented from moving with respect to the drawer
 attachable plate portion 142, the drawer attachable plate portion 142 is
 relatively displaceable with respect to the drawer bracket 74. Relative
 movement between plate portion 142 and bracket 74 in a direction parallel
 to bracket central wall portion 78 due to the fact that the cut out 92,
 94, 96, 98, 102, 104 in the central wall portion 78 are larger, both
 vertically 221, 221 and horizontally 178, 179 than the studs 161-166
 received therethrough. There is sufficient frictional contact between
 bracket central wall portion 78, which may be constructed from sheet
 metal, and the abuttingly engaged surfaces 154, 156 of plate portion 142
 which may be constructed from high strength plastic, to ordinarily retain
 plate portion 142 in stationary relationship with respect to bracket
 central wall portion 78. However, this frictional engagement is
 sufficiently weak that a person of ordinary strength can move plate
 portion 142 both translationally and rotationally with respect to bracket
 central wall portion 78 (in translational directions parallel to wall
 portion 78 and rotational directions about axes perpendicular to central
 wall 78. Such displacement may be necessary to align plate portion 142 and
 attached removable plate portion 144 with adjacent bezel components such
 as central bezel plate 270 and/or chin plates 310, 330.
 It will be appreciated by those having skill in the art that although plate
 portion 142 is the specifically described embodiment has six stud portions
 161-166 that a similar floating attachment could be provided with one or
 any member of rear projections. Similarly, although member 176 is shown in
 an arrangement where it deflects laterally, any other snap lock
 configuration may be used such as, for example, an arrangement where
 member 123 projects in direction 174 rather than direction 178 and wherein
 member 176 moves in direction 174 and the opposite direction in order to
 snap lock into position. It is also to be understood that the snap fit
 relationship between plate portion 142 and attachment plate 110 may also
 be accomplished by one or more flexible members mounted on attachment
 plate 110 which coact with rigid surface portion projecting from plate
 portion 142. For example, a flexible member (not shown) similar in profile
 to member 176 but rotated 180.degree. could be provided on plate 110. A
 rearwardly projecting locking stud (not shown) similar in profile to that
 of locking portion 122 but rotated 180.degree. could be provided on plate
 portion 142. The flexible member (not shown) provided on the locking plate
 110 and the locking stud (not shown) provided on plate portion 142 could
 be constructed and arranged such that the flexible member (not shown) was
 deflected laterally by the locking stud (not shown) during downward
 displacement of the plate 110 until it snapped laterally back to a
 position below the locking stud. In this position it would prevent the
 plate 110 from being moved upwardly because of the abutting engagement
 between the end of the flexible member (not shown) and the locking stud
 (not shown).
 The above described mounting and dismounting of plate portion 142 from
 drawer bracket 74 would ordinarily be accomplished with removable plate
 portion 144 attached to drawer attachable plate portion 142. The structure
 of one embodiment of a removable plate portion 144 and a manner of
 attachment thereof to drawer attachable plate portion 142 will now be
 described with reference to FIGS. 2, 4, 10, and 11. Each removable plate
 portion 144 comprises first and second bottom/top wall portions 232, 233.
 The plate portion 144 comprises a first lateral side wall 234 having a
 first rearwardly projecting flange portion 236 having an inter-surface
 portion 237 which abuts plate 142 lateral side wall portion 216 or 214
 depending upon whether plate 144 is mounted on a left-hand or right-hand
 drawer. Plate portion 144 also comprises a second lateral side face 238
 with rearwardly projecting flange portion 240 having an inner-surface 241
 adapted to abut surface 214 or 216. Plate portion 144 has a rear edge
 surface portion 242 comprising portions 244, 246 associated with flanges
 236, 240 respectively. The removable plate has first and second
 horizontally extending peripheral rear edge surface portions 248, 250
 which are recessed, e.g. 6.7 mm, from edge portions 244, 246 and extend
 transversely thereof. A plurality of screw receiving bosses 252, may be
 integrally formed with and project rearwardly from the removable plate
 portion 144. The bosses are positioned with respect to the lateral side
 face portions 234, 238, so as to be positioned in alignment with
 corresponding holes 148, 150, etc, in the drawer bracket attachable plate
 portion 142 for securing plate portion 144 to plate portion 142. The
 spacing between the inner surfaces 237, 241 of flange portions 236, 240 is
 substantially the same as the spacing between lateral side faced portions
 214, 216 of member 142 to maintain lateral stability of the plate 144 when
 mounted on plate 142. Surfaces 248, 250 of removable plate portion 144 are
 positioned in abutting engagement with front face 210 of plate portion
 142. Removable plate portion 144 comprises a plurality of vent openings
 251, 253 extending therethrough from front to rear. The plane 257 of rear
 peripheral wall portion 255 positioned about each vent opening is
 preferably recessed e.g., 2.5 mm from the edge surface portions 248, 250
 which abuttingly engage plate 142. Thus, the front face 210 of upper
 portion 208 of plate 142 and the rear surface 259 of plate 144 and inner
 surfaces 237, 241 of plate 144 lateral side walls 234, 238 define a plenum
 chamber (manifold) 254 which is in fluid communication with both vent
 openings 252, 253 in plate 144 and vent openings 209, 211, etc. in plate
 142. Thus, the housing 30 is vented by air traveling through vent openings
 251, 253, etc. and 209, 211, etc. and corresponding holes in bracket 74
 and snap on plate. The plenum chamber obviates the need to alight the vent
 openings in plate 142 with those in plate 144.
 FIGS. 12 and 13 illustrate a central bezel plate 270 having a plane of
 symmetry 271 dividing the plate into mirror image left and right halves
 273, 275. The plate has a front face portion 272 having a rectangular
 periphery. The front face may include left and right opaque, vertically
 elongated rectangular panels 274, 276 extending from the top to the bottom
 of the front face. The front face may also include a central intermediate,
 vertically elongated, rectangular panel 278 which may be transparent.
 Panel 278 may extend between top and bottom opaque horizontally elongated
 panels 282, 284. In some configurations the central transparent panel 278
 may be replaced, as shown in FIG. 1, by an upper plate 277 and a lower
 plate 283. The upper plate may be transparent and may have a control panel
 279 positioned immediately behind it. The control panel may have buttons
 280, 281, etc. projecting through corresponding holes in upper plate 277.
 Central bezel plate 270 may include a generally rectangular top face
 portion 286 and generally rectangular bottom face portion 288 as shown in
 FIGS. 12 and 13. The central bezel plate 270 may also include a generally
 rectangular left lateral side wall 292 and right lateral side wall 294.
 Projections 296, 298, etc. and bored bosses 300, etc. and lower flange 302
 having bores 304, etc. therein are adapted to facilitated attachment of
 central plate 270 to the front face 42 of sheet metal housing 30 and/or
 attach chin plate 310 thereto. In a typical autochanger rack configuration
 only one of the bezel assemblies 28 provided on each housing would include
 a control unit. The other bezel assemblies would simply contain the single
 transparent plate 278 as best illustrated in FIG. 1. The central bezel
 plate may be constructed from any relatively rigid, durable material such
 as metal or high strength plastic.
 FIGS. 14 and 15 illustrate a chin plate 310 which is adapted to be used
 with the bottom most one in a stacked array of bezel assemblies 28 as
 illustrated in FIG. 1. The bottom chin plate 310 may have a generally flat
 rectangular front face portion 312, rectangular lateral side wall portion
 314, 316 and a rectangular bottom wall 317. The front face may have a
 horizontally elongated bore 320 extending there through for the purpose of
 power switch access. A plurality of flanges 322, etc. screw receiving
 bores 324, etc. and rear projections 326, etc. are provided for attaching
 the bottom chin plate 310 to central plate flanges 302 and the housing 30.
 The bottom chin plate 310 is not attached to the drawer bezel assembly
 140. A middle chin plate 330 which is adapted to be used with all bezel
 assemblies 28 in a stacked array, except for the bottom most bezel plate
 assembly is illustrated in FIG. 1 and FIG. 16. Depending upon the slot
 spacing distances in a rack 10 the middle chin plate 330 may have a height
 greater than, less than or equal to the height of the bottom chin plate
 310. As best seen in FIG. 1 the middle chin plate 330 is configured to
 maintain a generally planar relationship with each portion of the bezel
 assembly 28 components that are positioned immediately above it. Thus, as
 illustrated in FIG. 16 the middle chin plate may comprise a front face
 having a central rectangular front wall portion 332 outer rectangular
 front wall portions 334, 336, and intermediate rectangular front face
 portions 338, 340. The outer face portions and intermediate face portions
 are connected by forwardly projecting portions 342 (only one shown). The
 central face portion 332 may be recessed slightly from the intermediate
 face portions 338, 340. The middle chin plate 330 has a bottom face
 portion 344 a top face portion 346 and opposite side face portions 348
 (only one shown). The middle chin plate may have the same type of
 connector structure as described above with respect to the bottom chin
 plate 310. It will be seen from FIG. 1, FIG. 22, and FIG. 23 that the chin
 plates 310, 330 are adapted to be positioned immediately below associated
 drawer bezel assemblies 140 and central bezel plates 370. The chin plates
 are fixedly attached to the central bezel plates 270 and may serve as a
 reference structure for alignment of the left and right drawer bezel
 assemblies 142 which are positioned immediately above the left and right
 end portions of an associated chin plate. The above described structure
 for mounting the drawer bezel assembly on an associated drawer bracket 74
 allows the drawer bezel assembly to "float" i.e., be displaced and rotated
 slightly in a horizontally and vertically extending plane perpendicular to
 plane 271. Thus, each drawer bezel assembly 140 may be hand rotated and
 vertically displaced if necessary to position it with the bottom face
 portion thereof in the exact parallel relationship with the top face
 portion of an associated chin plate 310 or 330.
 FIGS. 17 and 18 illustrate a forehead plate 350 which may have a smooth
 rectangular front face portion 352 a rectangular top face portion 354,
 rectangular lateral side face portions 356, 358 and a generally
 rectangular bottom face portion 359. A plurality of flanges 360, 362, 364
 having bores 366, etc. there through are provided for attaching the
 forehead plate 350 to a top portion of rack 10 immediately above the
 uppermost bezel assembly 28 as shown in FIG. 1. Different height forehead
 plates may be used depending upon rack 10 configurations or, as shown in
 FIG. 23 the forehead plate may be eliminated in some embodiments.
 It is a feature of the bezel assembly 28 that it may be provided in
 multiple different configurations (e.g., 411 shown in FIG. 1, 461 shown in
 FIG. 23 and 501 shown in FIG. 22) by simply changing the appearance of
 bezel drawer removal plate portion 144. Drawer bezel assemblies 140 having
 three different removable plate portions 144 are illustrated in FIGS. 19,
 20, and 21. In FIG. 19 the removal plate portion 144 is the same as the
 one shown and described above with reference to FIGS. 10 and 11. It may be
 seen from FIG. 19 that this configuration 410 of removal plate 144 has a
 front face portion 412 which includes a flat vertically elongated panel
 portion 414 and a beveled portion 416 integrally formed therewith. The
 beveled portion 416 includes a plurality of horizontally extending panel
 portions having parallel face surfaces 420, 422, 424, 426, and 428.
 Between these paneled portions are horizontally extending front vent
 openings 419, 421, etc. which correspond to previously described rear vent
 openings 351, 253, etc. Disposed between horizontally extending panel
 portions 422 and 424 is a horizontally extending panel portion 430 having
 a recessed portion 432 therein. Side wall portions associated with
 horizontally extending panel portions 422, 424 have upwardly and
 downwardly extending recesses therein, respectively. The regions of
 horizontally extending panel portions 422 and 424 adjacent to recess 430
 may thus act as handles into which a user may insert one or more fingers
 in order to pull open the attached media holding drawer 54, FIG. 2. It may
 be seen from FIG. 19 that a horizontally extending plane of bilateral
 symmetry 440 divides this first removal plate configuration 410 into
 mirror image first and second halves 442, 444. As a result of the
 bilateral symmetry of configuration 410 it is necessary to have only one
 forming mold for producing removable plate portions 144 for this bezel
 assembly 28 configuration 411. The reason is that the removable plate 144
 shown in FIG. 19 on a left hand drawer of the housing may be flipped 180
 degrees so that lateral side face 238 is positioned on the left hand side
 thereof rather than the right hand side thereof. The panel portion 144 and
 this configuration may then be used in association with the right hand
 drawer. It will also be appreciated that because of the bilateral symmetry
 of drawer attachable plate portion 142 about a vertically extending plane
 that it too may be used on either a left hand or right hand drawer. Thus,
 in order to provide the portion of the bezel assembly 28 position between
 any two chin plates or a chin plate and forehead plate it is necessary to
 have only three molds to produce the five different separate plates that
 form that portion of bezel assembly 28. In other words, both the left hand
 and right hand removal plates 144 of configuration 410 may be formed from
 a single mold and both the drawer attachable plate portions 142 may be
 formed from a single mold. Central bezel plate portion 270, of course,
 also requires a separate mold. FIG. 1 illustrates the bezel assembly 28
 configuration 411 in a three stack format 446.
 A second configuration 460 of removable drawer plate portion 144, FIG. 20,
 is used to provide a second bezel assembly 28 configuration 461, FIG. 23.
 In this embodiment of the removable plate portion 144 a front face portion
 462 comprises two outer vertically elongated rectangular panels 464, 468
 having a plurality of ribs 470, 472, etc. extending horizontally
 therebetween. The ribs are divided by vent openings 474, 476, etc. Each of
 the ribs may be generally flat except for the bottom rib 478 which has a
 partial disk shape which extends outwardly from the other ribs and
 provides a grippable upper surface 480 and lower surface (not shown) for
 facilitating opening of the attached medial drawer 54. This plate has
 identical lateral side faces 463, 465. This configuration 460 has a
 vertical plane of bilateral symmetry 484 dividing it into first and second
 mirror image halves 486, 488. It will be appreciated that because of the
 bilateral symmetry about vertical plane 484 that configuration 460 may be
 used in association with either a left hand or a right hand drawer. Thus,
 the portion of the bezel assembly configuration 461 shown above chin plate
 310 in FIG. 23 may also be provided with only three mold cavities. To the
 extent that a bezel manufacturer is manufacturing the bezel assembly
 configuration 411 shown in FIG. 1 it will be necessary to produce only a
 single additional mold in order to provide the bezel assembly shown in
 FIG. 23 since plate portions 142 and 270 of configuration 461 are
 identical to those of configuration 411 as are the chin and forehead
 plates. The plate configuration 460 may also be provided to form a plenum
 chamber between it and the associated drawer attachable plate portion 142
 to provide the same venting capability as that of configuration 410. FIG.
 23 in addition to showing bezel assembly configuration 463 also
 illustrates an autochanger in a one stack bezel array 50.
 FIG. 21 illustrates a removable plate portion 144 in a third configuration
 500 which provides a third bezel assembly configuration 501, FIG. 22.
 Third configuration 500 may be essentially identical to first
 configuration 410 except that the horizontally extending panel and vent
 arrangement is replaced by a plurality of rectangular holes 502, 504, etc.
 arranged in a plurality of rows 506, 508, 510, 512, and columns 514, 516,
 518, 520. A user may stick the tips of her fingers into holes 502, 504,
 etc. in order to grip plate portion 144 to open the associated media
 drawer. Third configuration 500 has a horizontal plane of bilateral
 symmetry of 530 dividing the panel into mirror image first and second
 halves 532, 534. Like configuration 410 of FIG. 19 this removable plate
 configuration 500 may be used on the left hand drawer in a first
 orientation and used on the right hand drawer in a second orientation
 rotated 180 degrees from the first orientation. FIG. 22 illustrates bezel
 assemblies 28 mounted in a two stack array 540. It will of course be
 appreciated that any of the bezel assembly configurations 411, 461, 501,
 may be provided in a single stack, two stack, three stack, or any other
 multi stack array. It will also be understood that although specific
 removable plate portion 144 configurations have been described that any
 number of configurations could be provided which enable use of the
 removable plate portion 144 with either a left hand drawer or a right hand
 drawer so long as the plates have at least one plane of bilateral symmetry
 passing through them in the directions 173, 174 in which the media drawer
 opens and closes.
 It is also to be understood that although the specific embodiments
 disclosed each have a drawer bezel assembly 28 with a drawer attachable
 plate portion 142 having its viewable face portion 185 positioned below
 the removable plate portion 144 that the relative position up and down of
 the drawer attachable plate portion and the removable plate portion could
 be reversed. It will also be appreciated that any of the drawer bezel
 assemblies of FIGS. 19 through 21 could be rotated 90 degrees either
 clockwise or counterclockwise and be vertically elongated and horizontally
 shorten. Such configuration would also provide the same features of
 bilateral symmetry within the entire bezel assembly 28, and ease of
 modification through changing the removable plate portion, which is
 provided in the above specifically described embodiments of FIGS. 19
 through 21. Also, although the above embodiments have been described with
 respect to a media autochanger housing 30 having only a single left hand
 drawer and a single right hand drawer positioned about a central panel
 these same basic features would be applicable to an autochanger or other
 device having any number of drawers with or without a stationary central
 panel. It is to be noted that in all of the bezel configurations 28 shown
 that the entire bezel configuration 28 has bilateral symmetry about the
 central vertical plane 271 of the central plate 270.
 While illustrative and presently preferred embodiments of the invention
 have been described above, it should be understood that the inventive
 concepts may be otherwise variously embodied and employed and that the
 appended claims are intended to be construed to include such variations
 except insofar as limited by the prior art.