Automated apparatus for manufacture of mattress borders with sewn handles

Abstract
A machine for automatically producing a mattress border with handles sewn to the border material. Border material is pre-fed from a selected spool, screened for splice avoidance and measured. Handle material is fed from a selected spool mounted in a multiple handle material spool magazine mounted on rails, fed into a handle folding assembly, and cut to length. Ends of the handle material are folded under by the handle folding assembly and the handle then transferred in a folded condition from the handle folding assembly to a correct position on the border material. A double frame handle press holds each folded end of the handle material in place as each end is maneuvered under a sewing head needle to apply a stitch pattern to secure the folded ends to the border material. The double frame handle press is translated separately from the carriage assembly which travels in the sew pattern, to position the other end of the handle under the sewing needle.
Description




FIELD OF THE INVENTION




The invention pertains generally to automated sewing operations and, more particularly, to automated sewing operations which include folding and attachment of one piece of material to another.




BACKGROUND OF THE INVENTION




Mattresses have traditionally been provided with handles on the vertical side panel or “border” material which covers the side of the mattress, between the top and bottom surfaces. Such border handles are most commonly in the form of a rope or elastic cord, with the ends extending through grommets in the border material and knotted or stapled inside the mattress. The assembly of such handles is labor intensive, requiring measurement for grommet placement, operation of a grommet press, and insertion and securement of each end of the handle through the grommet.




More recently, handles made of a strip of fabric have been sewn to the border material. This requires that each end of the handle is secured by a substantial stitch pattern, such as a box with an X stitch pattern inside the box, in order to give the attachment sufficient strength. To sew a multi-dimensional pattern requires that the mattress border, with the handle in place on top of it, be moved in different directions on a platform under the sewing needle. Also, the ends of the handle can be folded under to double the thickness of material and further increase the strength of the handle. This can be done by hand, or by clamping the handle (with the ends folded) against the border and moving the clamped pieces by an automated carriage assembly, by use of an “X-Y” sewing machine. For example, the Mitsubishi PLK series sewing machines are equipped with an X-Y translation carriage mechanism, to which a clamping assembly can be attached, as described in U.S. Pat. Nos. 5,520,129 and 5,738,029. The '029 patent describes certain modifications to the stock Mitsubishi carriage assembly to increase the X-direction range of motion of the entire assembly, to position an opposite end of a mattress handle under the sewing head. This requires a large amount of repeated mechanical motion for high speed continuous production. Also, the '029 patent requires that each handle be folded and inserted into a clamp by hand, and that the border material be advanced by hand to position it for attachment of the next handle.




Other machines have been developed which automatically fold material prior to placing it in position on another piece of material for sewing. This is common, for example, in the automated attachment of belt loops, such as described in U.S. Pat. Nos. 3,699,907; 4,385,571 and 4,393,800. Although such machines are functional, they do not represent the most efficient and flexible means of mass producing sewn articles, or to produce a specific component in its entirety such as a mattress border.




SUMMARY OF THE INVENTION




The present invention overcomes these and other disadvantages of the prior art, by providing an automated machine for producing measured and cut mattress borders with end folded handles attached by sewing. In accordance with one aspect of the invention, there is provided a machine for automatically producing a mattress border with at least one handle sewn to the mattress border material. The machine includes a spool of border material; a border material feed mechanism for feeding border material from the spool of border material; a spool of handle material; a handle material feed mechanism operative to feed and cut handle material from the spool of handle material; a handle cutter for cutting a handle from the handle material; a sewing platform over which the border material passes; a handle folder assembly for folding ends of a handle under prior to placement of a folded handle on the border material at a position where the folded handle is to be sewn to the border material, the handle folder assembly having: a folding plate having first and second ends; a folding blade at each end of the folding plate, each folding blade operative to descend down upon an end of a handle which extends beyond an end of the folding plate, and further operative to move underneath an end of the folding plate to fold the end of the handle under the folding plate; a clamp fork positioned over each end of the folding blade and operative to be lowered upon a folded end of the handle, and operative to move the handle off of the folding blade and on to the border material; a double frame handle press operative to frame and compress each folded end of the handle material positioned on the border material, and to move each folded end of the handle upon the sewing platform and under a sewing needle in a sewing pattern which attaches the folded ends of the handle to the border material.




In accordance with another aspect of the invention, there is provided a machine for automatically sewing ends of a fabric handle to a mattress border, the machine having: a supply of border material; a supply of handle material; a handle folding assembly; a double frame handle press; a sewing platform, and a sewing head; drive rollers for drawing border material from the border material supply onto the sewing platform; drive rollers for drawing handle material from the handle material supply into the handle folding assembly; a handle material cutter for cutting a length of handle material from the handle material supply; the handle folding assembly having: a folding plate with first and second ends about which ends of a piece of handle material are folded; folding blades which are actuated to descend down upon the ends of the handle material and under the folding blade; folded handle transfer arms which transfer the handle material with the ends folded from the folding blade on to the border material on the sewing platform; and a double frame handle press which compresses down upon the handle on the border material.




And in accordance with still another aspect of the invention, there is provided a material folding device operative to fold a portion of a piece of material under a plate and to transfer material in a folded condition, the device having: a folding plate having a planar surface for supporting at least a portion of material to be folded, and ends beyond which a piece of material may extend; at least one material holding device above the folding plate, the material holding device being controllable to extend downward into contact with a piece of material on the folding plate, and at least one folding blade operative to extend downward past an end of the folding plate and to extend under an end of the folding plate.




These and other novel aspects of the invention are described with specific reference to the accompanying Figures.











BRIEF DESCRIPTION OF THE FIGURES





FIG. 1

is a schematic side elevation of an automated mattress border production machine constructed in accordance with the present invention;





FIGS. 2 and 2A

are perspective and end views, respectively, of certain components of a handle folding assembly of the invention;





FIGS. 3 and 4

are each perspective views of certain components of a handle folding assembly of the invention;





FIGS. 5

,


7


and


8


are perspective views of certain components of the handle folding assembly, double frame handle press, sewing head and sewing platform of the apparatus of the present invention;





FIG. 6

is a cross-sectional view, taken in the direction of the arrows


6





6


in

FIG. 5

of an end segment of the handle folding and double frame handle press of the apparatus of the invention;





FIG. 9

is a plan view of the handle material magazine, handle folding assembly and double frame handle press of the apparatus of the invention, and





FIG. 10

is an isolated view of a preferred embodiment of the double frame handle press component of the apparatus of the invention.











DETAILED DESCRIPTION OF THE INVENTION




An exemplary description of the invention follows, where it is understood that like reference numerals refer to like elements.

FIG. 1

shows schematically at


10


an automated apparatus for producing mattress borders with folded and sewn handles. The apparatus


10


automatically performs the primary functions of:




1) measuring a length of border material sufficient for the size mattress to be made;




2) feeding and cutting material from a selected handle material spool to form a handle;




3) folding the ends of the handle material under and placing and holding the handle material in a folded condition at a proper location on the border material;




4) sewing the folded ends of the handle material to the border material;




5) advancing the border material to repeat the process for attachment of all handles, and




6) cutting the border material to a proper length to form a mattress border.




As depicted in

FIG. 1

, the process moves generally from right to left. A border material spool rack


12


is used to support one or more spools


14


of border material, which as known in the industry is typically quilted material or “ticking” of upholstery grade with a fill or foam and a backing layer. The rack


12


configured with multiple spools


14


provides a flexible border manufacturing system whereby borders of differing colors and styles can be produced without reloading or stocking the machine. The rack


12


is designed to rotatably mount multiple spools


14


in general alignment with a sewing lane of the machine, i.e., along a central axis about which the operative components are aligned. The spools


14


may be threaded into the apparatus


10


from a stationary position, or the spools


14


may be indexably mounted on the rack


12


to slide in and out of a feed position. Alternatively, the spools


14


can be mounted on a vertically mounted carousel which can be indexed to the selected spool.




From the spool


14


, border material


16


is threaded under a turning or pin


18


into a border material pre-feeder indicated generally at


20


, which includes a pair of pre-feed drive rollers


22


for advancing the border material from the spool. An encoder


24


is used to measure the length of the advanced material. The encoder


24


includes a wheel


26


that measures border material linear length by counting the turns of the wheel


26


times its known circumference. This information is communicated to a control system which controls the drive rollers


22


to automatically roll out a pre-selected border length. The encoder


24


is mounted on a hinge


28


. In this way, a seam or splice in the material registers as a “bump” and displaces the encoder


24


about the hinge


28


, which is indicated to the control system. When a splice or any flaw in the border material is detected in this manner, the control system directs the drive rollers


22


to advance the material to bypass the splice or flaw and cut it out of the border, so that a border section of the correct length can be measured that does not include a splice or flaw. The pre-measured border material is deposited into a holding bin


30


. Alternatively, detection of border material length insufficient to make a complete border can direct the machine to produce two border halves, which can thereafter be assembled into a single border.




Handle material


33


is retained on a separate spool


32


, generally aligned with the border material spool and the sewing lane of the apparatus


10


. A handle material feed assembly, indicated generally at


34


, includes a pair of driver rollers


35


, which are controlled by the control system to measure off and advance a predetermined length of handle material. A handle cutter


36


, such as a guillotine-type knife, is provided to cut the material


33


to length to produce a handle blank


40


, which is attached by stitching to the border material, as further explained herein.




As best shown in

FIG. 9

, in a preferred embodiment one or more handle material spools


32


are supported in a magazine


42


configured with walls


43


on a frame


46


which form multiple channels


44


to support a plurality of spools


32


in a parallel arrangement. Each spool


32


is supported to rotate within a channel


44


on a pair of knurled rollers


45


journalled to rotate between walls


43


. The frame


46


is mounted to roll upon transverse rails


48


, with a locking pin indexable in holes to fixedly align a selected spool with the handle material feed assembly


34


. By this arrangement, multiple handle material spools can be stocked in the machine, and an operator can quickly select, position and feed material from a spool for production of borders to varying specifications.




As further shown in the Figures, the apparatus includes a handle material folding assembly, indicated generally at


60


, which functions to fold the ends of the handle blank


40


and position it upon the border material for attachment by sewing. The handle blank


40


having two ends


50


,


52


is discharged from the feed assembly into the folding assembly


60


. In certain embodiments, a support arm or handle blank feeder may extend from the handle material feed assembly


34


, under the handle blank


40


, in order to facilitate transfer of the handle blank


40


from the feed assembly


34


to the folding assembly


60


. The folding assembly


60


includes a generally rectangular folding plate


62


about which handle ends


50


,


52


are folded. The folding plate


62


is covered by a top plate


64


which aligns and retains the handle blank


40


during folding. Mounted on the top plate


64


are one or more material holding devices


66


, such as inflatable diaphragms, operative to extend downward from the top plate


64


to contact the underlying material blank


40


to stabilize it prior to and during the automated folding operation. In a preferred embodiment, the diaphragms


66


are pneumatically actuated rubber bladders, of the type manufactured by Festo Co., but any other type of actuation could be employed (e.g. hydraulic, electromagnetic, etc.) to extend an object downward into contact with the handle blank, any of which are within this conceptual aspect of the invention. In commercial form, a metal disk is attached to the extended end of the bladder. However, in the present invention it has been found that use of the bladders without the metal disk is advantageous for the positive gripping contact the rubber makes with the handle material.




As is best shown in

FIG. 2

, the folding assembly


60


includes a pair of fork members


70


(also referred to herein as “fold compression devices”) which are operatively mounted upon a translation mechanism to vertically descend down upon the handle blank


40


against the folding plate


62


after the blank


40


has been positioned with ends


50


and


52


extending off of the respective ends of the folding plate


62


. Although shown in the form of forks, the fold compression devices


70


could be of an alternate configuration suitable to apply pressure to the folded portion of the handle material. After the fork members


70


are in place, folding blades


72


, also operatively mounted upon a translation mechanism, vertically descend to downwardly displace the handle ends


50


,


52


, as shown if FIG.


3


. As shown in

FIG. 4

, the blades


72


are next controlled to converge laterally under opposite ends of the folding plate


62


, wrapping the handle ends


50


,


52


under the ends of the folding plate


62


. The blades


72


, each include a lower lip


74


which faces inwardly and slides under the folding plate


62


in order to facilitate the folding of the ends


50


,


52


. The lower lip


74


further includes a recess


76


for retaining and registering the folded ends in alignment, particularly during removal of the folded handle blank from the folding plate


62


, as further described.




After the ends


50


,


52


are folded, the folded handle is transferred into position on the border material in the folded condition. As best shown in

FIG. 6

, the fork members


70


each include on an underside a structure configured to contact an edge of the handle material, for example in the form of a bar


80


that contacts an edge of the folded handle


40


. The fork members


70


and the folding blades


72


are laterally displaced carrying the folded handle blank


40


off of the folding plate


62


into position on the border material


16


, as shown in FIG.


5


. The border material


16


is supported by a sewing platform


15


. As shown in

FIG. 6

, each “tine” of each fork member


70


includes a spring clip


82


, such as a leaf-type spring, which applies a biasing force to the folded ends


50


,


52


of the handle blank


40


, to maintain pressure on the folded ends during the transfer operation as the handle is slid off of the folding plate


62


to the side. The top plate


64


includes a side door


68


that opens to allow the handle blank


40


to be removed from the folding plate


62


to the side. A piston actuator


67


(as shown) or any other equivalent structure can be used to actuate the side door


68


. An opposing side wall


69


can also be provided to extend from the folding plate


62


to the top plate


64


.




As shown in

FIGS. 6 and 7

, when the handle blank


40


is thus positioned over the border material, a pair of vertical cylinder rods


84


are actuated to extend down on the folded ends


50


,


52


. The fork members


70


include an opening between the “tines” to admit the cylinder rods


84


. When the cylinder rods


84


are in place, the fork members


70


and the folding blades


72


retract, leaving the handle blank


40


in its proper position on the border material, as shown in FIG.


7


. As shown in

FIGS. 7 and 8

, the cylinder rods


84


are vertically displaced between retracted and holding positions. The cylinders


84


are preferably pneumatically actuated, and can self-compensate for different thicknesses of handle material.




As shown in

FIGS. 7 and 8

, after the fork members


70


and folding blades


72


retract, a double frame handle press


90


vertically descends to press the folded ends


50


,


52


of the handle blank


40


on to the border material


16


. The double frame handle press


90


preferably includes a pair of generally square frames


921


,


922


for pressing down upon the perimeter regions of the respective folded ends


50


,


52


. The vertical motion of the double frame handle press can be accomplished by connection to the clamp mechanism incorporated into the Mitsubishi PLK-B1006 series commercial sewing machine, which is an example of one type of sewing machine with which the invention can be practiced. As shown in

FIG. 7

, the cylinder rods


84


pass through the openings in the respective frames


921


,


922


of the double frame handle press


90


. When the double frame handle press


90


is securely in place, the cylinder rods


84


retract, as shown in

FIG. 8

, thus leaving the folded handle ends freely exposed within the frames


921


,


922


for application of a stitch pattern by a sewing needle.




The double frame handle press


90


is connected to an X-Y carriage assembly (not shown) via strut


94


. The X-Y carriage assembly is incorporated into the sewing machine, such as the Mitsubishi PL-B1006, and is operative to move any assembly connected to it (via strut


94


) in a program-controlled pattern under a sewing needle


102


which extends from a sewing head


100


. For example, one type of programmed stitch pattern may be a box stitch placed within the each frame


921


,


922


through the handle and underlying border material.




The double frame handle press


90


is mounted to a rodless magnetically coupled translation device, indicated generally at


96


, such as a Bimba Ultran rodless cylinder assembly. The device


96


includes first and second blocks


961


and


962


attached respectively to frames


921


and


922


, and a central block


963


fixed relative to strut


94


. The blocks


961


and


962


are connected by three rods, one of which is pneumatically charged, and magnetically coupled. When pneumatically actuated, block


962


is forced toward and into contact with block


963


, thus translating the double frame handle press to position frame


922


where frame


921


was previously located. By this arrangement, only the double frame handle press


90


is moved to position frame


922


under the sewing needle, thus avoiding the need to increase the amount of travel of the X-Y carriage assembly of the sewing machine, and eliminating the need for the entire X-Y carriage assembly to repeatedly traverse the range between the two frames.




The double frame handle press


90


is further equipped with a material engagement surface, such as material engagement teeth


104


, as shown in

FIG. 8

, which may be located on either one of the frames or on a connecting member


93


which extends between the frames. The engagement teeth


104


function to grip the border material to move it in unison with the handle material through the X-Y sew pattern and along with the motion of the translation device


96


. Alternatively, the material engagement surface of the double frame handle press


90


may contact the handle material, or both the handle material and border material.





FIG. 10

illustrates a preferred embodiment of the double frame handle press


90


which includes laterally opposed side rails


105


which run substantially the length of the press to define a channel in which the handle


40


is positioned and squarely registered. High friction tape


106


or other frictional surface coating is applied to the underside surface of the press structure between the frames


921


and


922


to frictionally engage the handle. Border clamping pads


107


are provided proximate to frames


921


,


922


to frictionally engage the border material for the described lateral transfer. Also, the end sections


921




e


and


922




e


can be eliminated from the double frame handle press to avoid any potential interference with the folded ends of the handle when the handle press is retracted upward as described. The border clamping pads


107


can be mounted in an articulated manner, such as with one or more spring members, to achieve positive engagement with the border material, which due to quilting does not have a smooth or even surface.




After the handle


40


has been securely attached to the border material


16


, the finished border piece is advanced by drive rollers


110


. Afterwards, the border is cut to length with a guillotine-type cutter


112


, in which an excess splice section is automatically accounted for by the control system.




Each of the various described functions of the machine, as performed by pneumatic, hydraulic or electric actuation mechanisms, are controllable by a digital process controller. The controlled parameters include operation of the border material pre-feeder and associated encoder for length measurement and splice detection; secondary encoded length measurement for handle placement; handle material feed drive and cutting and operation of the handle feeder; operation of the handle folding assembly, and operation of the primary border drive rollers and cutter. A separate interfaced controller may be used for operation of the X-Y carriage assembly of the sewing machine to which the double frame handle press is attached, and for operation of the sewing machine.




Other control functions which can be implemented in accordance with the invention include menus for inputting border style designations based upon the type of border material to be used. Known stretch factors of selected materials are stored in the control system and compensated for in the material advancement and handle placement signals to the process drive components. Also, in the operation of the border material pre-feeder, detection of a length of border material insufficient to produce a complete continuous border will prompt the machine to produce two border halves. The controller can be operated by a touch screen which displays a menu of input options pertaining to the number and size of borders to be produced, style designation, number and placement of handles, and stitch pattern. These and other control features can be incorporated to provide a system which produces a wide variety of borders with minimal set-up change to the machinery.




Although described with reference to the automated production of mattress borders, the various principles and concepts of the invention are of course applicable to other types of automated sewing and material handling operations. It is also understood that various changes in the details, materials and arrangements of parts which have been herein described and illustrated may be made by those skilled in the art are within the scope of the invention, as defined by the accompanying claims and equivalents thereof.



Claims
  • 1. A machine for automatically producing a mattress border with at least one handle sewn to the mattress border material, the machine comprising:a spool of border material; a border material feed mechanism for feeding border material from the spool of border material; a spool of handle material; a handle material feed mechanism operative to feed and cut handle material from the spool of handle material; a handle cutter for cutting a handle from the handle material; a sewing platform over which the border material passes; a handle folder assembly for folding ends of a handle under prior to placement of a folded handle on the border material at a position where the folded handle is to be sewn to the border material, the handle folder assembly having: a folding plate having first and second ends; a folding blade at each end of the folding plate, each folding blade operative to descend down upon an end of a handle which extends beyond an end of the folding plate, and further operative to move underneath an end of the folding plate to fold the end of the handle under the folding plate; a clamp fork positioned over each end of the folding blade and operative to be lowered upon a folded end of the handle, and operative to move the handle off of the folding blade and on to the border material; a double frame handle press operative to frame and compress each folded end of the handle material positioned on the border material, and to move each folded end of the handle upon the sewing platform and under a sewing needle in a sewing pattern which attaches the folded ends of the handle to the border material.
  • 2. The machine of claim 1 wherein the spool of border material is mounted upon a spool rack configurable to hold one or more spools of border material.
  • 3. The machine of claim 1 wherein the border material feed mechanism comprises a pair of drive rollers operative to advance border material from the spool, and a sensor in operative association with the border material to measure a length of border material advanced from the spool sufficient to produce a mattress border.
  • 4. The machine of claim 1 further comprising a rack configured to support one or more spools of handle material in generally parallel spool channels, each spool channel having support rollers on which the spools roll as handle material is pulled from the spools, the rack being mounted upon rails generally transverse to the spool channels, whereby a selected spool of handle material within the rack is selectable for production and attachment of handles by movement of the rack upon the rails.
  • 5. The machine of claim 1 wherein the handle material feed mechanism comprises a pair of drive rollers operative to draw handle material from the spool, and a sensor to measure an amount of handle material drawn from the spool, and a cutter to cut an amount of handle material from the spool sufficient to form a mattress handle.
  • 6. The machine of claim 5 wherein the handle material feed mechanism further comprises a retractable handle guide which guides a piece of handle material cut from the spool into the handle folder assembly.
  • 7. The machine of claim 1 wherein the handle folder assembly is arranged to receive a piece of handle material cut from the spool of handle material and positioned on the folding plate, the handle folder assembly further having side and top walls which enclose a portion of the handle material, and first and second open ends, the handle material being inserted into the handle folder assembly through the first open end, and through which ends of the handle material extend beyond the ends of the folding plate.
  • 8. The machine of claim 7 wherein the handle folder assembly further comprises one or more diaphragms in a top wall, the diaphragm operative to extend into an interior space in the handle folder assembly to contact the handle material positioned upon the folding plate.
  • 9. The machine of claim 7 wherein one of the side walls of the handle folder assembly is operative to open to allow the handle material to be removed laterally from the handle folder assembly and off of the folding plate.
  • 10. The machine of claim 1 wherein each folding blade has a top recessed surface configured to register the folded ends of the handle material underneath the folding plate.
  • 11. The machine of claim 1 wherein each folding blade has a generally horizontal section oriented generally parallel to the folding plate, and a generally vertical section connected to the horizontal section.
  • 12. The machine of claim 1 wherein each clamp fork has one or more tines, and a spring underneath a tine which contacts the handle when the clamp fork is lowered upon the handle.
  • 13. The machine of claim 1 wherein each clamp fork has a pusher bar configured to contact an edge of the handle when the clamp fork is lowered upon the handle.
  • 14. The machine of claim 1 wherein each fork clamp has two tines with a gap between the tines dimensioned to receive an axial end of a handle fold retainer rod.
  • 15. The machine of claim 1 wherein the double frame handle press has two spaced apart frames, each frame dimensioned to generally frame a folded end of the handle material when the double frame handle press is compressed upon the folded handle material positioned on the border material, the double frame handle press being mounted upon a shuttling device operative to shuttle the double frame handle press from one of the two frames being positioned under a sewing needle to the other of the two frames being positioned under the sewing needle.
  • 16. The machine of claim 1 wherein the double frame handle press further comprises a material gripping structure which engages the border or handle material when the double frame handle press is compressed upon the handle material.
  • 17. The machine of claim 1 wherein the shuttling device to which the double frame handle press is mounted is a rodless magnetically coupled cylinder assembly having a stationary block attached to one end of the double frame handle press and a movable block attached to another end of the double frame handle press, rodless magnetically coupled cylinders extending between the two blocks, operative to move the movable block toward and away from the stationary block to thereby shift the double frame handle press from one position to another position.
  • 18. The machine of claim 1 further comprising at least one handle material fold retention rod which extends downward on to the folded handle material positioned on the border material to hold the handle material in a folded condition.
  • 19. The machine of claim 18 comprising a handle material fold retention rod mounted to extend through each frame of the double frame handle press.
  • 20. The machine of claim 18 wherein the handle material fold retention rods are actuated to extend downward to contact a folded end of the handle material prior to compression of the handle material by the double frame handle press, and actuated to retract from the handle material when the double frame handle press is compressed upon the handle material.
  • 21. A machine for automatically sewing ends of a fabric handle to a mattress border, the machine comprising:a supply of border material; a supply of handle material; a handle folding assembly; a double frame handle press; a sewing platform, and a sewing head; drive rollers for drawing border material from the border material supply onto the sewing platform; drive rollers for drawing handle material from the handle material supply into the handle folding assembly; a handle material cutter for cutting a length of handle material from the handle material supply; the handle folding assembly having: a folding plate with first and second ends about which ends of a piece of handle material are folded; folding blades which are actuated to descend down upon the ends of the handle material and under the folding blade; folded handle transfer arms which transfer the handle material with the ends folded from the folding blade on to the border material on the sewing platform; and a double frame handle press which compresses down upon the handle on the border material.
  • 22. The machine of claim 21 wherein the supply of border material is on a reel, and the reel is supported by a rack, and the rack is adaptable to support multiple reels.
  • 23. The machine of claim 21 wherein the supply of handle material is on a reel, and the reel is supported within a movable magazine, and the magazine is configured to hold multiple reels.
  • 24. The machine of claim 21 wherein the handle folding assembly is movably mounted relative to the sewing platform, and in an operable position is generally opposed to the sewing head.
  • 25. The machine of claim 22 wherein the drive rollers for drawing border material from the border material supply are mounted upon the rack which supports the border material.
  • 26. The machine of claim 21 wherein the drive rollers for drawing handle material from the handle material supply are mounted proximate to the handle material cutter, and proximate to a handle material feeder which extends toward the handle folding assembly as handle material is fed to the handle folding assembly.
  • 27. The machine of claim 21 wherein the double frame handle press includes two generally flat frames, each frame having a flat undersurface which contacts the folded ends of the handle material, each frame being connected to a shuttling device operative to move each frame in a position generally under the sewing head.
  • 28. The machine of claim 27 further comprising a border material gripper connected to the shuttling device and operative to grip the border material to cause movement of the border material in accordance with movement of the shuttling device.
  • 29. The machine of claim 27 wherein the shuttling device is a pneumatically operated magnetically coupled rod and block assembly having two blocks and rods extending between the two blocks, and a frame connected to each block.
  • 30. The machine of claim 29 wherein one of the blocks of the rod and block assembly is fixedly mounted proximate to the sewing head.
  • 31. A material folding device operative to fold a portion of a piece of material under a plate and to transfer material in a folded condition, the device comprising:a folding plate having a planar surface for supporting at least a portion of material to be folded, and ends beyond which a piece of material may extend; at least one material holding device above the folding plate, the material holding device being controllable to extend downward into contact with a piece of material on the folding plate, at least one folding blade operative to extend downward past an end of the folding plate and to extend under an end of the folding plate, a top plate in which at least one material holding device is mounted, and at least one side wall between the top plate and the folding plate, and wherein the side wall is moveable.
  • 32. A material folding device operative to fold a portion of a piece of material under a plate and to transfer material in a folded condition, the device comprising:a folding plate having a planar surface for supporting at least a portion of material to be folded, and ends beyond which a piece of material may extend; at least one material holding device above the folding plate, the material holding device being controllable to extend downward into contact with a piece of material on the folding plate, and at least one folding blade operative to extend downward past an end of the folding plate and to extend under an end of the folding plate, at least one fold compression device operative to extend down on top of a piece of material on the folding plate and over a portion of the piece of material under the folding plate, wherein the fold compression device is operative to move a piece of folded material to a side of the folding plate.
  • 33. A material folding device operative to fold a portion of a piece of material under a plate and to transfer material in a folded condition, the device comprising:a folding plate having a planar surface for supporting at least a portion of material to be folded, and ends beyond which a piece of material may extend; at least one material holding device above the folding plate, the material holding device being controllable to extend downward into contact with a piece of material on the folding plate, at least one folding blade operative to extend downward past an end of the folding plate and to extend under an end of the folding plate, wherein the material holding device is an inflatable diaphragm positioned over the folding plate.
  • 34. A material folding device operative to fold a portion of a piece of material under a plate and to transfer material in a folded condition, the device comprising:a folding plate having a planar surface for supporting at least a portion of material to be folded, and ends beyond which a piece of material may extend; at least one material holding device above the folding plate, the material holding device being controllable to extend downward into contact with a piece of material on the folding plate, at least one folding blade operative to extend downward past an end of the folding plate and to extend under an end of the folding plate, at least one fold compression device operative to extend down on top of a piece of material on the folding plate and over a portion of the piece of material under the folding plate, wherein the fold compression device further comprises a spring member on an underside which contacts the material on the folding plate.
  • 35. A device for folding a first piece of material, transferring the first piece of material in a folded state onto a second material, holding the first piece of material in a folded state in a fixed position on the second material, and moving both the first piece of material and second piece of material in unison in a pattern under a sewing needle, the device comprising:a folding assembly operative to fold at least a portion of the first piece of material, the folding assembly having: a folding plate having a planar surface for supporting the first material and at least one end beyond which a portion of the first material may extend, a folding blade operative to extend down past an end of the folding plate and to move under the folding plate to thereby fold an end of the first piece of material under the folding plate, a fold compression device operative to come in contact with a portion of the first piece of material over a portion of the first piece of material folded under the folding plate, the folding blade and fold compression device each operative to move to a side of the folding plate to transfer the first piece of material in a folded state onto a second piece of material, a press for holding the first piece of material in a folded state in a fixed position against the second piece of material, the press being connected to a carriage mechanism operative to move in a stitch pattern under a sewing needle of a sewing machine to attach the first piece of material to the second piece of material by sewing, and wherein a portion of the folding blade which contacts the first material is recessed, and wherein a folded portion of the first piece of material stays within the recessed portion when the folding blade moves to a side of the folding plate.
  • 36. A device for folding a first piece of material, transferring the first piece of material in a folded state onto a second material, holding the first piece of material in a folded state in a fixed position on the second material, and moving both the first piece of material and second piece of material in unison in a pattern under a sewing needle, the device comprising:a folding assembly operative to fold at least a portion of the first piece of material, the folding assembly having: a folding plate having a planar surface for supporting the first material and at least one end beyond which a portion of the first material may extend, a folding blade operative to extend down past an end of the folding plate and to move under the folding plate to thereby fold an end of the first piece of material under the folding plate, a fold compression device operative to come in contact with a portion of the first piece of material over a portion of the first piece of material folded under the folding plate, the folding blade and fold compression device each operative to move to a side of the folding plate to transfer the first piece of material in a folded state onto a second piece of material, a press for holding the first piece of material in a folded state in a fixed position against the second piece of material, the press being connected to a carriage mechanism operative to move in a stitch pattern under a sewing needle of a sewing machine to attach the first piece of material to the second piece of material by sewing, wherein the fold compression device has a spring member which contacts the first piece of material.
US Referenced Citations (7)
Number Name Date Kind
4114544 Miyachi et al. Sep 1978
4137857 Miyachi et al. Feb 1979
4803935 Off Feb 1989
5588384 Miyachi et al. Dec 1996
5738029 Porter et al. Apr 1998
5881656 Grant Mar 1999
5983814 Block Nov 1999