Space enclosure

Information

  • Patent Grant
  • 6421967
  • Patent Number
    6,421,967
  • Date Filed
    Friday, October 29, 1999
    25 years ago
  • Date Issued
    Tuesday, July 23, 2002
    22 years ago
  • Inventors
  • Examiners
    • Cuomo; Peter M.
    • Vu; Stephen
    Agents
    • Angenehm Law Firm
    • Friederichs; N. Paul
    • Flynn; William
Abstract
A space enclosure having hangers and pans for enclosing the open spaces between each pair of adjacent joists. Hangers are attached on each side of the joist space and a pan is placed therebetween providing a continuous top over the area below the deck which allows the storage of water sensitive items in this area. The space enclosure may include a two part hanger with one part securable to the joist and the second part securable to the pan. The first hanger part is selectively securable to the second hanger part. The first hanger part may include mechanism for selectively detaching the first and second hanger parts. The second hanger part may include mechanism for stabilizing the system in high winds. The pan may include mechanism for cutting the pan for width adjustment and mechanism for fine tuned width adjustment. The enclosure may further include a bonnet for precipitation control.
Description




BACKGROUND OF THE INVENTION




In the conventional construction of wood frame buildings, the floors are supported by an array of parallel framing joists in a spaced apart relationship. Conventionally, these joists are constructed of dimensioned lumber, that is, lumber that is nominally two inches thick and an even number, such as eight, ten, or twelve, inches wide and having a length sufficient to span the area to be filled. However, it is presently becoming more common to engineer joists from other materials, such as open trusses, I-joists, glued laminates, and metal. The joists are placed having their longer dimension in a vertical plane and are separated by a fixed distance, typically sixteen, 19.2 or twenty-four inches. The spacing is center of the top face of two adjacent joists and is expressed as sixteen, 19.2, or twenty-four inches on center.




In interior construction the joists form the base for an interior floor and are typically covered with four foot by eight foot sheets of plywood or oriented strand board forming a continuous top surface while leaving rectangular open spaces below, between each pair of adjacent joists. Frequently, the lower surface of the joists is covered becoming the ceiling of the rooms below.




In exterior construction, such as a deck, the joists are covered with spaced apart planking. The planking is fastened to the joists having a small space between any two planks for esthetic considerations, and more importantly, to allow the planking to shed rain water. When the deck is constructed a distance above grade, this leaves an open area below the deck which could be used for storage, were the area not open the rain and other elements.




SUMMARY OF THE INVENTION




The invention disclosed herein is hangers and pans for enclosing the open spaces between each pair of adjacent joists. Hangers are attached on each side of the joist space and a pan is placed therebetween providing a continuous top over the area below the deck which allows the storage of water sensitive items in this area.




The improved preferred embodiment of the present invention includes a two part hanger with one part securable to the joist and the second part securable to the pan. The first hanger part is selectively securable to the second hanger part. The first hanger part may include mechanism for selectively detaching the first and second hanger parts. The second hanger part may include mechanism for stabilizing the system in high winds. The pan may include mechanism for cutting the pan for width adjustment and mechanism for fine tuned width adjustment.











BRIEF DESCRIPTION OF THE DRAWINGS





FIG. 1

is a cross-sectional view of an embodiment of the hanger.





FIG. 2

is a cross-sectional view of the preferred embodiment of the hanger.





FIG. 3

is a cross-sectional view of the preferred embodiment of the pan to be inserted into a hanger.





FIG. 4

is a partial cross-sectional view showing the pan installed in the preferred embodiment of the hanger.





FIG. 5

is an isometric view looking upwards showing the invention installed between a pair of adjacent joists.





FIG. 6

is an isometric view of the preferred embodiment of an elongate hanger.





FIG. 7

is a sectional view of the improved preferred embodiment of the pan secured to the second hanger portion inserted into the first hanger portion together with the selective detachment mechanism.





FIG. 8

is an end view of the second hanger portion with a portion of a stabilizing bar.





FIG. 9

is an end view of the first hanger portion.





FIG. 10

is a cross-sectional view of an embodiment of the hanger in the third embodiment of the invention.





FIG. 11

is a cross-sectional view of the preferred embodiment of the hanger in the third embodiment of the invention.





FIG. 12

is a partial cross-sectional view showing the pan installed in a preferred embodiment of the hanger in the third embodiment of the invention.





FIG. 13

is a cross sectional view showing one variant of the improved preferred embodiment of the invention of the pan and hangers assembled for use.





FIG. 14

is an isometric view of the fourth embodiment of the intention.





FIGS. 15-25

are cross sectional views of additional alternate embodiments of the hangers.





FIG. 26

shows an alternate embodiment of the bonnet and fastener as being integral.





FIGS. 27-30

alternate embodiments of stabilizer bars.





FIGS. 31 and 32

show an alternate embodiment the pan attaching horizontally to the hanger.











DETAILED DESCRIPTION OF THE INVENTION




The present invention, generally


10


, as shown in

FIGS. 1-5

consists of a plurality of hangers


12


and a pan


14


. The hangers


12


may be formed from a thin material in the cross-sectional shape similar to the letter capital “R”. Each hanger


12


has an attachment tail


16


, an upper loop


18


, and a formed retainer


20


. The upper loop


18


may have a fastening lip


17


, shown in

FIG. 2

, with such fastening lip


17


providing a place for a nail, screw, or other fastener. The pan


14


is likewise formed from a sheet of thin material. The pan


14


on its each side has formed an elongate rounded holder


30


formed along the periphery of each side. The holder


30


is designed to removably mate with the retainer


20


of the hanger


12


. The pan


14


further may have at least one ridge


32


formed along its length substantially parallel to the holders


30


. The ridge


32


may be pointed, flat (as shown), rounded, or other suitable shape. Parallel to the at least one ridge


32


there is formed a plurality of valleys


34


.




The hanger


12


may be formed from any material such as metal, elastomeric sheeting, canvas, plastic, including vinyls, or other materials suitable for the conditions described herein. The hanger


12


may be a continuous length of hanger


12


, as shown in

FIG. 6

, or may be multiple short hangers


12


arrayed along a joist


40


. Each hanger


12


is attached to a joist


40


by any suitable means, including discrete fasteners such as nails, screws, or staples, or adhesive. In one embodiment of the invention the back side


22


of the hanger


12


is coated with a pressure sensitive adhesive so that the hanger


12


may be placed against and adhered to a joist


40


with or without the use of additional fasteners.




The material forming the hanger


12


must have sufficient resistance to bending so that when the holder


30


of the pan


14


has been placed into the retainer


20


of the hanger


12


the holder


30


of the pan


14


will not be inadvertently dislodged, yet, the material must be sufficiently flexible to allow a user to secure the pan


14


by placing its respective holders


30


into the hanger


12


retainers


20


without undue effort, as shown in FIG.


4


.




In another embodiment of the hanger


12


is shown in FIG.


1


. In this embodiment, the hanger retainer


21


is curved spirally inward. Thus, when the pan holder


30


of a pan


14


is urged into the hanger loop


18


, the hanger retainer wraps around the pan holder


30


securing the pan holder


30


more securely than when using the preferred embodiment of the hanger


12


. This embodiment of the hanger


12


is used to more permanently secure the pan


14


to the hangers


12


. The pan


14


may attach horizontally to the hanger


12


as shown in

FIGS. 31 and 32

, which in the bent position may allow easier insertion of the pan


14


and in the straight position,

FIG. 32

, may lock the pan


14


to the hanger


12


.




The pan


14


may be formed from any material such as metal, canvas or plastic. The material used to form the pan


14


must be sufficiently stiff to support the anticipated loads placed upon it, yet sufficiently flexible so the material to cooperatively deform to allow the insertion of the holders


30


into the retainers


20


of the hangers


12


. Each pan


14


is constructed having a proper width to fit between a pair of joists


40


. That is, the width, as measured between the outer surfaces of the hangers


30


of the pan


14


would be approximately 14.5 inches to fit sixteen inch on center joists or 22.5 inches to fit twenty-four inch on center joists


40


. Variations in the width between the joists will be accommodated by the flexibility of the pan


14


, which includes radial joists as used in circular shaped decks. The pan


14


can also be fabricated in different widths for other applications. The pan


14


may be fabricated in any convenient lengths such as eight to twenty feet.




The cross-sectional view of the pan


14


, as shown in

FIG. 3

, shows longitudinal ridges


32


and valleys


34


which are provided for the purpose of stiffening the pan


14


alone its length and reducing the movement of water on the pan


14


and ice damage. It is understood that the ridges


32


and valleys


34


, if present, need not be of any particular number or shape, but should provide the necessary stiffening and slosh reduction.




In its use, the user selects sufficient lengths of pans


14


and sufficient number of hangers


12


for the application. The hangers


12


are then attached to the sides of the joists


40


, as shown in FIG.


5


. The hangers


12


are located vertically off horizontal so as to provide a slight slope to allow the rainwater to drain to one end,




When an appropriate number of hangers


12


have been attached to a pair of adjacent joists


40


, one or more sections of pan


14


may be inserted therebetween. Each length of pan


14


is inserted by placing the pan holders


30


abutting the hanger retainers


20


and urging the pan holders


30


into the hanger retainers


20


by deforming both the hanger retainers


20


and the pan holders


30


. When so installed, as shown in cross-section in

FIG. 4

, the pan


14


is retained and provides a water repellent layer for protecting the goods stored below.




When so installed, rain falling upon the deck boards


42


will pass through the spaces between the deck boards


42


and fall onto the pan


14


. The ridges


32


in the pan


14


, if present, may limit the lateral movement of the water directing the water to the valleys


34


, where the water will flow down the slope of the pan


14


to its end and thence off of the pan


14


into a collection area. Thus, anything stored beneath the deck boards


42


is protected from rain and other precipitation.




The inventor has further designed an improved preferred embodiment 50 shown in

FIGS. 7-9

. The improved preferred embodiment of the present invention includes a two part hanger with one part


52


securable to the joist


40


and the second part securable to the pan


54


. The first hanger part


52


may include mechanism


58


for selectively detaching the first and second hanger parts


52


,


56


. The second hanger part


52


may include mechanism


60


for stabilizing the system in high winds. The pan


54


may include mechanism


62


for cutting the pan


54


for width adjustment and mechanism


64


for fine tuned width adjustment. These aspects are further defined below.




The pan


54


may include a primary ridge


66


, having a secondary ridge


68


with a bead


69


defined at the top thereof Together the primary and secondary ridges


66


,


68


with bead


69


may define the mechanism


62


for cutting the pan


54


for width adjustment. The primary ridge


66


has the basic functions as the ridge


32


described in the other drawings. The bead


69


provides an easy to identify area to score and break the pan


54


to the desired width. The user simply uses a knife or other such object and scores the pan


54


along the bead


69


and folds the pan


54


along the score mark


70


to break the pan


54


in a desired location, This function could be achieved without the secondary ridge


68


or bead


69


, although the secondary ridge


68


or bead


69


provides the added aspect of helping control the location of the knife along or near the peak


72


of the primary ridge


66


. Once cut, the each edge


73


or the pan


54


is sized and shaped to be joined with the second hanger portion


56


.




The pan


54


may further include a mechanism


64


for fine tuned width adjustment. The fine tune mechanism


64


may include a finger port


74


and shoulders


76


. The finger port is sized to generally receive a finger of the user. Two or more finger ports


76


are positioned between each of the primary ridges


66


, although this is not necessary. The shoulders


76


provide a slightly wider opening for the user's finger and, as will be later discussed, create a point of attachment for the second hanger portion


52


. Subject to these aspects the pan is intended to be made in the same mode, manner, materials and have the same function as the pan


14


as described with respect to the other drawings.




The second hanger portions


56


may be Generally shaped as shown in FIG.


8


. The second hanger portion


56


may include an upper pocket


78


for retaining the edge


73


of the pan


54


and a lower pocket


80


for biasing against the shoulder


76


immediately adjacent the edge


73


of the pan


54


. The edge


73


is slipped into the upper pocket


78


for retainment therein. The lower pocket


80


may include a projection


82


, shown curled, that fits in the shoulder


76


of the pan


54


as shown in FIG.


7


. The horizontal segment


84


immediately adjacent the shoulder


76


is intended to be shorter, but approximately the same length as the upper horizontal segment


86


of the second hanger portion


56


, thereby securing the pan


54


horizontally with respect to the second hanger portion


56


. This vertical end segment


88


or the pan


54


to position relatively parallel with the vertical wall


89


or the second hanger portion


56


. The vertical end segment


88


of the pan


54


is intended to be shorter, but approximately the same length, between the upper horizontal segment


86


or the second hanger portion


56


and the upper point


90


of the upper pocket


78


. This provides for vertical securement of the pan


54


relative to the second hanger


56


. The securement points between the pan


54


and the second hanger portion


56


may be selective, permanent, or integral, although the securement points are intended to be selective.




The secondary hanger


56


may include mechanism


60


for stabilizing the system in high winds. Such stabilizing mechanism


60


may include stabilizing bar


100


and a pocket


92


defined between the upper horizontal segment


86


and a lower horizontal segment


94


, which are positioned relative to one another with the pocket vertical wall


96


. The stabilizing bar


100


is intended to be oriented perpendicularly to the secondary hanging portion


56


, spanning the width of the pan


54


to the opposing pocket


92


. The pocket vertical wall


96


may include openings or a continuous indentation


98


guiding fasteners to the joist


40


. A bead or continuous opening may also be provided on the first hanger


52


such as was shown and described with respect to the embodiments shown in

FIGS. 1-6

. The pocket


92


further provides an area in which a stabilizing bar


100


may be glued or otherwise secured into the pocket


92


perhaps with fasteners projecting through openings


98


into the stabilizing bar


100


. The stabilizing bar is intended to hold the system more rigid in high wind encounters and add support to prevent ice damage.

FIGS. 27-30

show alternate embodiments of the stabilizing mechanism


60


, including stabilizing bars


100


and pockets


92


together with nubs


101


sized and positioned to snugly fit the circumference of the bars


100


.




The first hanger


52


secures to a joist


40


in a manner similar to that shown and described with regard to hanger


12


shown and described in

FIGS. 1-6

. The first hanger portion


52


includes a pocket


102


for retaining the head


104


of the second hanger portion


56


. The head


104


is slipped into the pocket


102


and is selectively held therein.




The first hanger portion


52


may further include mechanism


58


for selectively detaching the first and second hanger parts


52


,


58


. On occasion a user may wish to remove the pan


54


for cleaning, replacement, or other purpose. The detaching mechanism


58


permits this to be done, while allowing the first and second hanger portions


52


,


56


to remain more solidly secured at all other times. Specifically, the detaching mechanism. May include a hook


106


. The hook


106


may be captured from above with a tool


108


,

FIG. 7

, perhaps through slits between boards on the upper surface of a deck. The tool


108


may be a loop, relatively ridged hook, or other suitable design for selectively capturing and biasing against the hook


106


, of the first hanger portion


52


. When the tool


108


biases against the hook


106


, the pocket


102


is spread allowing the head


104


out of the pocket


102


.




In use, the installer secures the first hanger portion


52


to a joist


40


. This securement may be selective, permanent, or integral. The pan


54


may be sized via scoring and bending, perhaps by the user or manufacturer, and is joined to the second hanger portion


56


as described above. The head


104


of the second hanger


56


is inserted into the first hanger portion


52


for retainment therein. This is performed on each side of the pan


54


such that the pan


54


is secured between the joists


40


. The user may then adjust the width, wider, or narrower, of the pan


54


for an even and smooth appearance using finger ports


74


. To remove the pan


54


the user may use tool


108


to capture the hook


106


, reaching down from above the pan


54


. The tool


108


is biased against the hook


106


to open the pocket


102


and allow the head


104


to escape the pocket


102


.




In a third embodiment of the invention, as shown in

FIG. 10-12

, the previously discussed hangers


12


, or


54


are used with a pan


14


or


54


with the addition of a bonnet


110


above the hangers


12


or


54


. The bonnet


110


and hangers


12


or


54


may also be integral as shown in

FIG. 26

with fastener openings


111


. The bonnet


110


provides a mounting flange


112


and an angular lip


114


. The mounting flange provides for the attachment of the bonnet


110


to a joist


40


. The angular lip


114


functions to direct the rainwater or the like away from the joist


40


and into the pan


14


,


54


for disposal. The flange


112


may be mounted to the joist


40


by any suitable means such as nails, screws, or other discrete fasteners and is preferably attached using a continuous strip of adhesive to prevent the intrusion of water between the flange


112


and the joist


40


. When the bonnet


110


is attached to a joist


40


using discrete fasteners, it is preferred that the bonnet


110


is additionally sealed to the joist


40


using a bead of caulk or other sealant


116


, as shown in FIG.


11


.




The angular lip


114


of the bonnet


110


is located in a downwardly facing acute angle to the joist


40


. The lip


114


collects water and directs the water away from the joist and into the pan


14


, or


54


preventing water from collecting between the joist


40


and a hanger


12


or


52


where the water can cause the deterioration of the joist


40


or leak past the hanger


12


or


54


and damage any goods stored below.




While the bonnet


110


has been shown as a separate piece from the hanger


12


or


52


, it is understood that in some embodiments of the space encloser


10


, it is preferred that the bonnet


110


be formed integral with the hanger


12


or


54


. It is further understood that the bonnet


110


may be added to either of the two previously described embodiments of the space encloser


10


.




In its use, the third embodiment of the space encloser


10


is quite similar to the above descriptions made with respect to the previous embodiments. Particularly, when the bonnet


110


is constructed integral with a hanger


12


,


52


the operation is identical to the previous description of the embodiments of the space encloser


10


. In some cases, however, it may be advantageous to add a bead of caulk or sealant


116


over the bonnet to provide additional sealing.




When a discrete bonnet


110


is used, the bonnet


110


must be added before the space is completely enclosed by the space encloser


10


, and can be added at any step therebefore. For example, the bonnet


110


may be added before or after the hangers


12


,


52


are installed.




In a fourth embodiment of the space encloser


10


, as shown in

FIG. 14

, the hangers first parts


122


are located longitudinally along the joists


40


as described and discussed the previous three embodiments. The pan


124


is located longitudinally between the joists


40


enclosing the space therein while being secured to the hanger second parts


126


. The hanger first part


122


is elongate and formed from one of the suitable materials described above. The hanger first part


122


is attached to the joists


40


using either discrete fasteners


130


or an adhesive. The discrete fasteners shown in

FIG. 14

are shown as screws for convenience, it being understood that the discrete fasteners


130


may also be nails, staples, or the like. The hangers first part


122


have an upturned lip


128


extending outwardly from the joist


40


for mating with the hanger second part.




The hanger second part


126


is an elongate part having a vertical wall


132


, an angular mating surface


136


and a downwardly extending lip


138


. The vertical wall


132


is located to align abuttingly with the joist


40


assisting locating the hanger second part


136


. The mating surface


136


is located to retainingly mate with the upturned lip


128


of the hanger first part


122


while cooperating with the downturned lip


140


of the hanger second part


126


to secure the hanger second part


126


adjacent the hanger first part


122


.




The pan


124


is an elongate rectangular sheet of a suitable material as described above. The pan


124


has ridges


142


and valleys


144


. The pan


124


extends longitudinally between two joists


40


and has a width suitable to span the distance therebetween. The pan


124


may not separately attached to either of the hanger parts


122


,


126


, but, rather is located between the hanger first part


122


and the hanger second part


126


and deformed to be secured therein by installation of the hanger second part


126


.




The pan


124


may further be adjusted to a correct width for fitment between irregularly spaced joists or non-parallel


40


by scoring and breaking as previously describe and by fine tuning as previously described.




When the hanger parts are attached using discrete fasteners


130


, may be selectively installed to attache only the hanger first part


122


or may be installed to also pass through and attach the hanger second part also. In some embodiments, the discrete fasteners


130


may also pass through and attach the pan


14


,


54


,


124


directly to the joist. It is preferred, however that the discrete fasteners


130


do not attach either the hanger second parts


56


,


126


or the pan


14


,


54


,


124


so that the pan


14


,


54


,


124


may be removed for cleaning or other maintenance.





FIG. 13

shows another alternate embodiment of the space encloser


10


using the bifurcated hanger


52


and another alternately shaped pan


54


.

FIGS. 15 through 25

show other alternate embodiments of the hangers


12


,


52


for use in varying conditions. In some of the alternate hangers


12


,


52


such as shown in

FIGS. 18

,


19


,


22


,


23


, and


24


the hanger second part


56


is latched into the hanger first part


52


, while in the remaining embodiments illustrated, the hanger second part


56


is secured to the hanger first part


52


by friction.




Although the present invention has been described with reference to preferred embodiments, workers skilled in the art will recognize changes may be made in form and detail without departing from the spirit and scope of the invention.



Claims
  • 1. A space enclosure comprising:a. a pair of sets of hangers, each of the hangers having an inside and an outside, the outside having a means for attachment to a respective joist formed thereon, the inside having a first means for securing formed thereon, the first means for securing further having a recurved open volute and a deformable tail formed thereon defining a closed retainment means thereon, the volute having a shape selected from the group consisting of the capital letters “C,” “P,” and “R”; b. an elongate pan having a length and a width, and at least one primary ridge extending the length of said pan, the at least one ridge dividing the pan and longitudinally stiffening the pan, while forming a plurality of longitudinal troughs, the at least one ridge further dividing liquids, substantially evenly among the plurality of troughs; the pan further having edges along the periphery of the length, the edges having a second means for securing formed thereon, the means for securing having a closed volute shaped for selective alignment with the open volute of the first means for securing and retaining the pan therein; whereby the collected liquids are divided among the plurality of troughs for flow to the selected end for collection and removal therefrom.
  • 2. The enclosure as described in claim 1 wherein the second means for securing is separable from the pan.
  • 3. The enclosure as described in claim 1 wherein the second means for securing further comprises a means for stabilizing the pan from wind movement.
  • 4. The enclosure as described in claim 3 wherein the means for stabilization comprises a pocket formed in the second securement means for receiving a transverse bar, the transverse bar further being attached to and between a pair of joists.
  • 5. The enclosure as described in claim 1 wherein the pan further comprises at least one secondary ridge and a bead defined between said primary ridge and said secondary ridge, the bead forming a scoring area for scoring and breaking the pan for reducing the width of the pan.
  • 6. The enclosure as described in claim 5 wherein the pan further includes a means for fine width adjustment.
  • 7. The enclosure as described in claim 6 wherein the means for fine width adjustment comprises at least one finger port for squeezingly making fine adjustments to the width of said pan.
  • 8. The enclosure as described in claim 2 wherein the second securement means comprises a first pocket for retaining one of the edges of the pan.
  • 9. The enclosure as described in claim 8 wherein the pan further comprises peripheral longitudinal edges and a longitudinal shoulder adjacent each of said pan edges, and the second securement means further comprises a second pocket for receiving the pan shoulder.
  • 10. The enclosure as described in claim 1 further comprising a bonnet located above each of said hangers and sealingly attached to a respective joist, the bonnet further having a lip extending downwardly and outwardly from the joist for directing the liquids from the joist.
  • 11. The enclosure as described in claim 10 wherein the bonnet is formed integrally with the hanger.
  • 12. A space enclosure comprising:a. a set of first hangers, each of said hangers having an inner edge and an outer edge, the outer edges of a plurality of said hangers attached longitudinally to parallel supports in a sloping manner, the inner edges of said hangers having a matable first means for securing formed thereon, the mating first securing means extending upwardly and inwardly thereat; b. an elongate rectangular pan, having a length and a width, and at least one ridge extending along the length of said pan, the width of the pan corresponding to a spacing between the parallel supports, c. a set of second hangers, wherein each of said hangers having an inner edge and an outer edge, the outer edges of a plurality of said hangers abutting on the parallel supports, the inner edges having a matable second securing means for securing formed thereon, the second means extending downwardly and inwardly thereat, whereby the pan is placed along the first securing means and the second securing means is aligned therealong and urged into a mating position to secure the pan and second set of hangers secured to the first set of hangers.
  • 13. The enclosure as described in claim 12 wherein the first securement means comprises an outwardly extending key and the second securement means comprises an inwardly extending keyhole for accepting the deformed pan and the key of the first securement means.
  • 14. The enclosure as described in claim 12 wherein the first set of hangers are attached to the parallel supports using discrete fasteners.
  • 15. The enclosure as described in claim 12 wherein the first and second sets of hangers are attached to the parallel supports using discrete fasteners.
  • 16. The enclosure as described in claim 12 wherein the first set of hangers comprises a single elongate unitary hanger.
  • 17. The enclosure as described in claim 12 wherein the second set of hangers comprises a single elongate unitary hanger.
FIELD OF THE INVENTION

The present invention relates to methods and apparatus for enclosing the space between two parallel supports, such as between two adjacent joists in standard frame construction and more particularly to a plurality of hangers and a pan for enclosing each space between the pairs of adjacent joists whether the joists are parallel or non-parallel. The present application claims priority from application Ser. No. 60/106173 filed Oct. 29, 1998 and application Ser. No. 60/131,400 filed Apr. 28, 1999.

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