U.S. patent application number 11/730466 was filed with the patent office on 2008-10-02 for cleaning tray for electrical components and carrying tool with the same.
This patent application is currently assigned to SAE Magnetics (H.K.) Ltd.. Invention is credited to Toshinobu Yoshida.
Application Number | 20080237158 11/730466 |
Document ID | / |
Family ID | 39792425 |
Filed Date | 2008-10-02 |
United States Patent
Application |
20080237158 |
Kind Code |
A1 |
Yoshida; Toshinobu |
October 2, 2008 |
Cleaning tray for electrical components and carrying tool with the
same
Abstract
A cleaning tray for electrical components includes a holder
having a frame and a pair of crossed inner bars. End portions of
the crossed inner bars connect to the frame to separate the frame
into four sub-frames. The frame has a bottom bar, two opposite side
bars and a top bar which is tilted against the bottom bar for
facilitating dropping water. Several male fasteners are formed
along inner borders of each of the sub-frames. The cleaning tray is
shared by those different electrical components and consequently to
reduce tray cost, simplify manufacturing process and increase
productive efficiency. The invention also discloses a carrying tool
for electrical components with the cleaning tray.
Inventors: |
Yoshida; Toshinobu; (Hong
Kong, CN) |
Correspondence
Address: |
NIXON & VANDERHYE, PC
901 NORTH GLEBE ROAD, 11TH FLOOR
ARLINGTON
VA
22203
US
|
Assignee: |
SAE Magnetics (H.K.) Ltd.
Hong Kong
CN
|
Family ID: |
39792425 |
Appl. No.: |
11/730466 |
Filed: |
April 2, 2007 |
Current U.S.
Class: |
211/49.1 ;
G9B/23.096; G9B/23.098; G9B/5.144; G9B/5.149; G9B/5.15 |
Current CPC
Class: |
G11B 23/505 20130101;
G11B 5/41 20130101; G11B 5/4846 20130101; G11B 23/50 20130101; G11B
25/043 20130101; G11B 5/4813 20130101 |
Class at
Publication: |
211/49.1 |
International
Class: |
A47F 7/00 20060101
A47F007/00 |
Claims
1. A cleaning tray for electrical components comprising: a holder
having a frame and a pair of crossed inner bars, end portions of
the crossed inner bars connecting to the frame to separate the
frame into a plurality of sub-frames; wherein the frame has a
bottom bar, two opposite side bars and a top bar which is tilted
against the bottom bar for facilitating dropping water, and a
plurality of male fasteners are formed along inner borders of each
of the sub-frames.
2. The cleaning tray as claimed in claim 1, wherein one of the
crossed inner bars is tilted against the bottom bar for
facilitating dropping water.
3. The cleaning tray as claimed in claim 1, wherein the bottom bar
is thinner than the top bar for facilitating ultrasonic
cleaning.
4. The cleaning tray as claimed in claim 1, wherein one side of the
frame forms at least one protrusion and an opposite side of the
frame defines at least one cutout such that two holders are stacked
by aligning and engaging the protrusion of one of the holders with
the cutout of the other holder.
5. The cleaning tray as claimed in claim 1, further comprising at
least one supporter configured for supporting the electrical
components thereon, the supporter having a plurality of female
fasteners for detachably engaging with the male fasteners of the
sub-frames.
6. The cleaning tray as claimed in claim 5, wherein the male
fasteners each have a raised portion, and the female fasteners each
have a recessed portion for engaging with the raised portion.
7. The cleaning tray as claimed in claim 5, wherein the supporter
further has a plurality of poles and sockets adapted to hold the
electrical components tightly.
8. The cleaning tray as claimed in claim 1, wherein the electrical
components are HSA, AFA and/or FPC of disk drive devices.
9. A carrying tool for electrical components comprising: a
plurality of cleaning trays, each cleaning tray comprising a holder
and at least one supporter, the holder having a frame and a pair of
crossed inner bars, end portions of the crossed inner bars
connecting to the frame to separate the frame into a plurality of
sub-frames, a plurality of male fasteners being formed along inner
borders of each of the sub-frames, the supporters being configured
for supporting the electrical components thereon, each of the
supporters having a plurality of female fasteners for detachably
engaging with the male fasteners of the sub-frames, one side of the
frame forming at least one protrusion, and an opposite side of the
frame defining at least one cutout such that the plurality of
cleaning trays are able to be stacked by aligning and engaging the
protrusion of one of the cleaning tray with the cutout of another
cleaning tray; and a pair of covers for respectively covering the
two outmost cleaning trays thereby sandwiching the stacked cleaning
trays.
10. The carrying tool as claimed in claim 9, further comprising a
hand-bar for picking up the electrical components to avoid directly
handling the electrical components.
11. The carrying tool as claimed in claim 9, wherein two opposite
sides of each of the cover each define a notch for securing a clip
for locking the pair of covers.
12. The carrying tool as claimed in claim 9, wherein the frame has
a bottom bar, two opposite side bars and a top bar which is tilted
against the bottom bar for facilitating dropping water.
13. The carrying tool as claimed in claim 12, wherein one of the
crossed inner bars is tilted against the bottom bar for
facilitating dropping water.
14. The carrying tool as claimed in claim 12, wherein the bottom
bar is thinner than the top bar for facilitating ultrasonic
cleaning.
15. The carrying tool as claimed in claim 9, wherein the male
fasteners each have a raised portion, and the female fasteners each
have a recessed portion for engaging with the raised portion.
16. The carrying tool as claimed in claim 9, wherein the supporter
further has a plurality of poles and sockets adapted to hold the
electrical components tightly.
17. The carrying tool as claimed in claim 9, wherein the electrical
components are HSA, AFA and/or FPC of disk drive devices.
Description
FIELD OF THE INVENTION
[0001] The present invention relates generally to a device for
fabricating hard disk drives, and more particularly to a cleaning
tray for electrical components, such as FPC (flexible printed
circuit), AFA (ACA (arm coil assembly) and FPC Assembly), and HSA
(head stack assembly) of the hard disk drives, and a carrying tool
for the electrical components with the cleaning tray.
BACKGROUND OF THE INVENTION
[0002] Disk drives are information storage devices that use thin
film magnetic media to store data. A typical disk drive comprises a
head stack assembly (HSA) with slider(s) thereon, a magnetic disk
mounted on a spindle motor which causes the magnetic disk to spin,
and a motor base to enclose the above-mentioned components. The
slider(s) flies over the surface of the magnetic disk at a high
velocity to read data from or write data to concentric data tracks
on the magnetic disk, which is positioned radially by an ACA
embedded (e.g. by epoxy potting or overmolding) in a fantail spacer
of the HSA. Generally, a voice coil motor (VCM) is used to drive
the ACA.
[0003] A traditional HSA comprises one or several HGAs, a fantail
spacer interposed between the HGAs, and a plurality of securing
means to couple the HGAs with the fantail spacer together. A FPC
aligns with the fantail spacer by a FPC assembly to electrically
connect with the HGAs. The plurality of securing means comprises a
bearing, a washer and a nut. In addition, mounting holes are formed
in the HGAs, respectively. The fantail spacer also defines a
mounting hole. These mounting holes are provided to permit the
bearing extend therethrough so as to combine the above-mentioned
components together with the help of the washer and the nut.
[0004] The HSA is a very precision and critical part in the disk
drive, so frequent cleaning and inspection/testing of electrical
components of the HSA, such as ACA, FPC, and slider, and the HSA
itself are required during the whole AFA/HSA manufacturing process.
The manufacturing process of the AFA/HSA will be described
hereinafter. For facilitating the description, the assembly of the
ACA and the FPC Assembly is designated as AFA hereinafter. The term
AFA cleaning means cleaning focus on ACA and FPC prior to
assembling the HGAs and the bearing with the AFA. The term HSA
cleaning means slider focus cleaning after the bearing and the HGAs
have assembled.
[0005] As shown in FIG. 1, a traditional AFA/HSA manufacturing
process includes the following steps: (111) AFA assembling on metal
plate tray in flow line; (112) loading the AFAs onto a cleaning
jig; (113) the cleaning jig carrying the AFAs and cleaning the AFAs
for the first time; (114) shifting the AFAs from the cleaning jig
to a clean flow line tray (the flow line tray should be cleaned
before step 114); (115) inspecting/testing the AFAs while carried
on the flow line tray; (116) loading the AFAs onto the cleaning
jig; (117) the cleaning jig carrying the AFAs and cleaning the AFAs
for the second time; (118) shifting the AFAs from the cleaning jig
to the clean flow line tray (the flow line tray should be cleaned
again before step 118); (119) the flow line tray shipping the AFAs
to a next station; (120) assembling each of the AFA with a HGA and
a bearing to form a HSA; (121) loading the HSAs onto a HSA
injection tray; (122) the HSA injection tray carrying the HSAs and
cleaning the HSAs.
[0006] As indicated above, the AFA/HSA process needs three kinds of
trays, such as metal tray, AFA/HSA flow line tray, and HSA
injection tray. The trays used in the prior AFA/HSA process are
generally vacuum forming trays which are easily contaminated, such
as forming burrs, metal particles and black particles. In order to
meet the cleanliness requirement, the trays must be cleaned before
the AFA/HSAs are loaded to them. That is, the trays and the
AFA/HSAs have to be cleaned separately. Moreover, the AFA/HSA
process also needs one or two kinds of cleaning jigs. In one word,
the tray and cleaning cost is high.
[0007] In addition, in the above-mentioned process, the AFA/HSAs
are loaded/unloaded so many times that much no-value stations and
operators are needed in the process. Moreover, the AFA/HSAs
loaded/unloaded operation causes contamination from directly handle
parts.
[0008] Hence, a need has arisen for providing a device for
fabricating HSA and important components thereof to simplify the
AFA/HSA process, avoid contamination, reduce cost, and increase
productive efficiency.
SUMMARY OF THE INVENTION
[0009] Accordingly, an object of the present invention is to
provide a cleaning tray for carrying, cleaning, and shipping
electrical components, such as FPC, AFA, and HSA of hard disk
drives, during the whole AFA/HSA process, which can be shared by
different electrical components.
[0010] Another object of the present invention is to provide a
carrying tool for electrical components of disk drive devices
during fabricating thereof, which can simplify manufacturing
process, save several kinds of trays/jigs traditionally used for
fabricating the HSA, and thereby improve productive efficiency and
reduce cost.
[0011] To achieve the above-mentioned objects, the present
invention provides a cleaning tray for electrical components
comprising: a holder having a frame and a pair of crossed inner
bars. End portions of the crossed inner bars connect to the frame
to separate the frame into a plurality of sub-frames. The frame has
a bottom bar, two opposite side bars and a top bar which is tilted
against the bottom bar for facilitating dropping water. A plurality
of male fasteners are formed along inner borders of each of the
sub-frames.
[0012] In an embodiment of the present invention, one of the
crossed inner bars is tilted against the bottom bar for
facilitating dropping water.
[0013] Preferably, the bottom bar is thinner than the top bar for
facilitating ultrasonic cleaning.
[0014] According to another embodiment of the present invention,
the cleaning tray for electrical components further comprises at
least one supporter configured for supporting the electrical
components thereon. The supporter has a plurality of female
fasteners for detachably engaging with the male fasteners of the
sub-frames. The male fasteners of the sub-frames each have a raised
portion, and the female fasteners of the supporter each have a
recessed portion for engaging with the raised portion.
[0015] Preferably, the supporter further has a plurality of poles
and sockets adapted to hold the electrical components tightly.
[0016] A carrying tool for electrical components in accordance with
the present invention comprises a plurality of cleaning trays and a
pair of covers for respectively covering the two outmost cleaning
trays to sandwich the stacked cleaning trays. Each cleaning tray
comprises a holder and at least one supporter. The holder has a
frame and a pair of crossed inner bars. End portions of the crossed
inner bars connect to the frame to separate the frame into a
plurality of sub-frames. A plurality of male fasteners are formed
along inner borders of each of the sub-frames. The plurality of
supporters are configured for supporting the electrical components
thereon. Each of the supporters has a plurality of female fasteners
for detachably engaging with the male fasteners of the sub-frames.
One side of the frame forms at least one protrusion, and an
opposite side of the frame defines at least one cutout such that
the plurality of cleaning trays are able to be stacked by aligning
and engaging the protrusion of one of the cleaning tray with the
cutout of another cleaning tray.
[0017] According to one embodiment of the present invention, there
are two kinds of supporters, one is HSA/AFA supporter, and the
other one is FPC supporter. Each holder can be engaged with one
HSA/AFA supporter and one FPC supporter, or four FPC supporters, or
two HSA/AFA supporters. Therefore, the cleaning tray can be shared
by FPC/AFA/HSA.
[0018] Preferably, the carrying tool further has a hand-bar for
picking up the electrical components to avoid directly handling the
electrical components. Therefore, cross contamination of the
electrical components is avoided.
[0019] In comparison with the prior art, the cleaning tray can
replace four kinds of trays/cleaning jigs traditionally used in the
AFA/HSA process. For different projects, the holder, the cover, and
the hand-bar can be shared, while the supporters can be changed
based on the size of any of the FPC/AFA/HSA to be carried. Thus,
the tray cost is reduced.
[0020] Since the cleaning tray can replace four kinds of
trays/cleaning jigs traditionally used in the AFA/HSA process, the
load/unload operations of the FPC/AFA/HSA can be reduced, that is,
the no-value stations and operators can be reduced. Thereby the
productive efficiency is improved, and simultaneity manufacturing
cost is reduced.
[0021] Since the top bar is tilted against the bottom bar for
facilitating dropping water, thereby, the dryness requirement is
met.
[0022] To summarize, the instant invention meets the cleaning and
dryness requirement, avoids contamination, improves productive
efficiency, and reduces the cost of fabricating the AFA/HSAs.
[0023] Other aspects, features, and advantages of this invention
will become apparent from the following detailed description when
taken in conjunction with the accompanying drawings, which are a
part of this disclosure and which illustrate, by way of example,
principles of this invention.
BRIEF DESCRIPTION OF THE DRAWINGS
[0024] The accompanying drawings facilitate an understanding of the
various embodiments of this invention. In such drawings:
[0025] FIG. 1 is a flowchart of a traditional manufacturing process
of a HSA;
[0026] FIG. 2a is a top view of a holder of a cleaning tray in
accordance with the present invention;
[0027] FIG. 2b is a cross sectional view of the holder taken along
line 2b-2b of FIG. 2a;
[0028] FIG. 2c is a perspective view of the holder shown in FIG.
2a;
[0029] FIG. 2d is another perspective view of the holder shown in
FIG. 2a;
[0030] FIG. 3a is a perspective view of an HSA/AFA supporter for
the cleaning tray;
[0031] FIG. 3b is another perspective view of the HSA/AFA supporter
shown in FIG. 3a;
[0032] FIG. 4a is a perspective view of an FPC supporter for the
cleaning tray;
[0033] FIG. 4b is another perspective view of the FPC supporter
shown in FIG. 4a;
[0034] FIGS. 5a-5b are perspective views of an integrative module
of an HSA/AFA supporter and an FPC supporter for the cleaning
tray;
[0035] FIGS. 5c-5d are perspective views of a second integrative
module of an HSA/AFA supporter and an FPC supporter for the
cleaning tray;
[0036] FIG. 5e is a perspective view of a third integrative module
of an HSA/AFA supporter and an FPC supporter for the cleaning
tray;
[0037] FIG. 5f is a perspective view of a fourth integrative module
of an HSA/AFA supporter and an FPC supporter for the cleaning
tray;
[0038] FIG. 6a is a perspective view of an embodiment of the
present invention illustrating the holder assembled with one
HSA/AFA supporter and one FPC supporter;
[0039] FIG. 6b is a perspective view of an embodiment of the
present invention illustrating the holder assembled with two
HSA/AFA supporters;
[0040] FIG. 6c is a perspective view of an embodiment of the
present invention illustrating the holder assembled with four FPC
supporters;
[0041] FIG. 7a is a perspective view of the cleaning tray carrying
one AFA, namely, one HSA and one FPC;
[0042] FIG. 7b is a perspective view of the cleaning tray carrying
two HSAs;
[0043] FIG. 7c is a perspective view of the cleaning tray carrying
four FPCs;
[0044] FIG. 8a is a perspective view illustrating AFA cleaning
while carried on the cleaning tray;
[0045] FIG. 8b is a perspective view illustrating HSA cleaning
whiled carried on the cleaning tray;
[0046] FIG. 9 is a perspective view of a carrying tool for
electrical components in accordance with the present invention;
[0047] FIG. 10a is a perspective view of a cover for the carrying
tool shown in FIG. 9;
[0048] FIG. 10b is another perspective view of the cover shown in
FIG 10a;
[0049] FIG. 11 is a perspective view illustrating the cleaning
trays stacked on the cover;
[0050] FIG. 12a is a perspective view of a hand-bar for the
carrying tool;
[0051] FIG. 12b is another perspective view of the hand-bar shown
in FIG. 12a; and
[0052] FIG. 13 is a flowchart of the method of fabricating a HSA of
disk drive devices using the cleaning tray, according to the
present invention.
DETAILED DESCRIPTION OF ILLUSTRATED EMBODIMENTS
[0053] Various preferred embodiments of the invention will now be
described with reference to the figures. As indicated above, the
present invention is directed to a cleaning tray for carrying,
cleaning, and shipping electrical components, such as FPC, AFA, and
HSA of hard disk drives, during the whole AFA/HSA manufacturing
process. The cleaning tray is designed so as to be shared by those
different electrical components and consequently to reduce tray
cost, simplify manufacturing process and increase productive
efficiency. This will be described in great detail hereinafter.
[0054] As shown in FIGS. 6a-6c, the cleaning tray 2 includes a
holder 20 and several supporters 21, 22. The holder 20 can be
selectively assembled with one HSA/AFA supporter 21 and one FPC
supporter 22, or two HSA/AFA supporters 21, or four FPC supporters
22 respectively shown in FIGS. 6a-6c.
[0055] Referring to FIGS. 2a-2d, according to one preferable
embodiment of the present invention, the holder 20 of the cleaning
tray 2, made of polycarbonate or polyether imide, has a frame 20a
and a pair of crossed inner bars 205, 206. The frame 20a has a top
bar 201, a bottom bar 202 opposite the top bar 201, and two
opposite side bars 203, 204 connecting to end portions of the top
bar 201 and the bottom bar 202. End portions of the crossed inner
bars 205, 206 connect to the frame 20a to separate the frame 20a
into a plurality of sub-frames 20b. In the present embodiment, the
crossed inner bars 205, 206 separate the frame 20a into four
sub-frames 20b. A plurality of male fasteners 207 are formed along
inner borders of each of the sub-frames 20b. The crossed inner bar
206 that connects the two opposite side bars 203, 204 is tilted
against the bottom bar 202 for facilitating dropping water.
Furthermore, the top bar 201 is also tilted against the bottom bar
202 for facilitating dropping water, and the bottom bar 202 is
straight. In addition, one side of the frame 20a forms four
protrusions 209, and an opposite side of the frame 20a defines four
cutouts 208 such that two holders 20 can be stacked by aligning and
engaging the protrusions 209 of one of the holders with the cutouts
208 of the other holder.
[0056] In another embodiment of the present invention, the bottom
bar 202 is thinner than the top bar 201 for facilitating ultrasonic
cleaning.
[0057] Referring to FIGS. 3a-3b, FIGS. 4a-4b and FIGS. 5a-5f, the
HSA/AFA supporter 21 and the FPC supporter 22 have several female
fasteners 301, 401, 501, 601, 701 respectively for detachably
engaging with the male fasteners 207 of the sub-frames 20b.
Therefore, the supporters 21, 22 are able to be selectively
assembled with the holder 20 based on the FPC and/or the AFA and/or
the HSA to be carried. As shown in FIGS. 3a-3b and FIGS. 4a-4b,
those supporters 21, 22 are designed as separate parts which can be
selectively and respectively assembled with the holder 20 based on
requirement. As shown in FIGS. 5a-5f, those supporters 21, 22 are
designed as an integrative module which is integrally formed and
can also be assembled with the holder 20 if required. Preferably,
the HSA/AFA supporter 21 and the FPC supporter 22 shown in FIGS.
5e-5f further have several poles 602, 702 and sockets 603, 703 for
holding the HSA/AFA/FPC tightly so that the HSA/AFA/FPC thereon
will not fall down when the cleaning tray 2 is turned upside down
for inspecting the HSA/AFA/FPC.
[0058] In one embodiment of the present invention, the male
fasteners 207 of the holder 20 each have a raised portion 207a, and
the female fasteners 301, 401 501, 601, 701 of the supporters 21,
22 each have a recessed portion 301a, 401a, 501 a, 601 a, 701a for
engaging with the raised portion 207a.
[0059] FIGS. 7a-7c illustrate the cleaning tray of the instant
invention with objects to be carried, such as HSA, AFA, and FPC.
FIG. 7a shows that one AFA, that is, one HSA 31 and one FPC 32 is
held on the HSA/AFA supporter 21 and the FPC supporter 22
separately. FIG. 7b shows that two HSAs 31 are held on the two
HSA/AFA supporters 21, and FIG. 7c shows that four FPCs 32 are held
on the four FPC supporters 22.
[0060] FIG. 8a illustrates the state that one AFA 33 is being
cleaned while carried on the cleaning tray 2, and FIG. 8b
illustrates the state that one HSA 31 is being cleaned while
carried on the cleaning tray 2. As shown in FIGS. 8a-8b, the
cleaning tray 2 with the AFA 33 and the HSA 31 is vertical
positioned in the water and then ultrasonic cleaned. Line AA and BB
are the water levels of AFA cleaning and HSA cleaning
respectively.
[0061] As is shown in FIG. 9, a carrying tool for electrical
components includes several cleaning trays 2 and a pair of covers
23.
[0062] The cover 23 shown in FIGS. 10a-10b has four side by side
frameworks, each of which is shaped corresponding to the holder 20
of the cleaning tray 2 for fixing the cleaning trays 2 thereon.
Referring to FIG. 11 in conjunction with FIG. 9, on each framework
of the cover 23, one cleaning tray 2 with FPC and/or AFA and/or HSA
carried thereon is placed. Then, other cleaning trays 2 with FPC
and/or AFA and/or HSA carried thereon are stacked one another, and
then another cover 23 is covered on the last tier of the cleaning
trays 2. Finally, the two covers 23 are fastened together by known
means to secure the cleaning trays 2 therebetween. In the assembly,
the two covers 23 respectively cover the outmost tier of cleaning
trays 2 to sandwich the stacked cleaning trays 2 therebetween. In a
preferable embodiment, two opposite sides of each cover 23
respectively define a notch 24 for a clip secured therein to fasten
the two covers 23. In the embodiment shown in FIG. 9, the two
covers 23 fix four stacks of the cleaning trays 2, and each stack
of the cleaning trays has 7 cleaning trays, so each carrying tool
can carry 28 AFAs or 56 HSAs or 112 FPCs.
[0063] In another embodiment of the instant invention, the carrying
tool further includes a hand-bar 25 shown in FIGS. 11a-11b. The
hand-bar 25 is used to clip the electrical components rather than
hand directly handling, so cross contamination of electrical
components is avoided.
[0064] Referring to FIG. 13, the method of fabricating a HSA of a
disk drive device using the above-mentioned cleaning tray comprises
the steps of: (211) assembling an AFA and loading the AFA onto the
cleaning tray; (212) the cleaning tray carrying the AFA and
cleaning the AFA for the first time; (213) inspecting and testing
the AFA while carried on the cleaning tray; (214) the cleaning tray
carrying the AFA and cleaning the AFA for the second time; (215)
the cleaning tray shipping the AFA to a next station; (216)
assembling the AFA with a HGA and a bearing to form a HSA; and
(217) the cleaning tray carrying the HSA and cleaning the HSA.
[0065] It can be seen from above detailed description that each
holder of the cleaning tray can be engaged with one HSA/AFA
supporter and one FPC supporter, or four FPC supporters, or two
HSA/AFA supporters. Therefore, the cleaning tray can be shared by
FPC/AFA/HSA, and several jigs or tools traditionally used for
fabricating the FPC/AFA/HSA are saved.
[0066] In comparison with the prior art, the cleaning tray can
replace four kind of trays/cleaning jigs traditionally used in the
AFA/HSA process. For different projects, the holder, the cover, and
the hand-bar can be shared, while the supporters can be changed
based on the size of any of the FPC/AFA/HSA to be carried. Thus the
tray cost is reduced.
[0067] Since the cleaning tray can replace four kinds of
trays/cleaning jigs traditionally used in the AFA/HSA process, the
load/unload operations of the FPC/AFA/HSA can be reduced, that is,
the no-value stations and operators can be reduced. Thereby the
productive efficiency is improved, and simultaneity manufacturing
cost is reduced. The top bar and one cross bar are tilted against
the bottom bar for facilitating dropping water, thereby the dryness
requirement is met. Furthermore, since the cleaning tray can be
cleaned with the AFA/HSA at the same time, the additional tray
cleaning cost is avoided.
[0068] The foregoing description of the present invention has been
presented for purposes of illustration and description. It is not
intended to be exhaustive or limit the invention to the precise
form disclosed, and obviously many modifications and variations are
possible in light of the above teaching. Such modifications and
variations that may be apparent to those skilled in the art are
intended to be included within the scope of this invention as
defined by the accompanying claims.
* * * * *