Abstract
A chair having a first frame portion with a backrest support and a rear leg portion at least part of the backrest support and the leg portion being formed from a single piece. A second frame portion has a seat support and a front leg portion extending in a direction transverse to the seat support, the seat support in a fixed position relative to the backrest support. The backrest support molded thereover in foam, the backrest support being substantially peripherally located around the foam of the backrest and the backrest being provided free from rigid supports extending across a middle portion of the backrest. The seat support molded thereover in foam, the seat support being substantially peripherally located around the foam of the seat and the seat being provided free from rigid supports extending across a middle portion of the seat.
Claims
1. A mold for manufacturing a chair having a frame with one or more legs comprising: first and second mold portions which are configured to close to contain a portion of the frame; a hole in at least one of the first and second mold portions and configured to receive foam therein; one or more openings in the each of the first and second mold portions configured to allow two of the one or more legs to extend through the one or more openings and out the mold such that the mold seals around the two of the one or more legs: wherein the first and second mold portions in a closed position define a mold cavity and further comprising at least one protrusion which extends into the mold cavity and the at least one protrusion is moveable to adjust an amount it extends into the mold cavity.
2. The mold of claim 1 wherein the one or more openings of the first mold portion are defined by two pairs of channels, one of the channels of each of the two pairs of channels positioned on the first mold portion and one of the channels of each of the two pairs of channels positioned on the second mold portion such that when the first and second mold portions are closed, the channels align to form two openings each configured to allow one of the one or more legs to extend there through.
3. The mold of claim 1 wherein the one or more openings of the second mold portion are defined by two holes spaced apart to allow two of the one or more legs to extend through the holes out the mold such that the mold seals around the two of the one or more legs in order to inhibit foam from exiting out the two holes, the two holes located in a mold surface which defines a bottom portion of a seat of the chair.
4. The mold of claim 1 wherein the at least one protrusion at configured in interact with the frame to inhibit foam from entering the frame.
5. The mold of claim 1 wherein the at least one protrusion is moveable along its axis.
6. A set of molds for manufacturing a chair comprising: a first mold including first and second mold portions which when closed define a first mold cavity: a second mold including third and fourth mold portions which when closed define a second mold cavity; each of the first and second molds including a hole for receiving foam therein; each of the first and second mold cavities having at least one opening, the at least one opening of the first mold cavity is configured to receive a first portion of a chair frame which extends out the first mold cavity through the at least one opening of the first mold cavity and the at least one opening of the second mold cavity is configured to receive a second portion of the chair frame which extends out the second mold cavity through the at least one opening of the second mold cavity: wherein the at least one opening of the first mold cavity is defined by a channel in the first mold portion and a channel in the second mold portion and the at least one opening of the second mold cavity is defined by a hole through the fourth mold portion.
7. The set of molds of claim 6 wherein the first mold cavity is configured to receive the first portion of the chair frame when the first portion of the chair frame is separate from the second portion of the chair frame.
8. The set of molds of claim 6 wherein the at least one opening of the first mold cavity with the first portion of the chair frame therein inhibits foam from exiting the first mold cavity through the at least one opening of the first mold cavity.
9. The set of molds of claim 8 wherein the at least one opening of the second mold cavity with the second portion of the chair frame therein inhibits foam from exiting the second mold cavity through the at least one opening of the second mold cavity.
10. The set of molds of claim 6 further comprising at least one moveable protrusion configured to extend in to the second mold cavity.
11. The set of molds of claim 10 wherein the at least one moveable protrusion is configured to interact with the second portion of the chair frame to inhibit foam from entering inside the second portion of the chair frame.
12. The set of molds of claim 11 wherein the at least one opening of the second mold cavity is defined by a hole through the fourth mold portion.
13. A set of mold for manufacturing a chair comprising: a first mold including first and second mold portions which when closed define a first mold cavity; a second mold including third and fourth mold portions which when closed define a second mold cavity; each of the first and second molds including a hole for receiving foam therein: each of the first and second mold cavities having at least one opening, the at least one opening of the first mold cavity is configured to receive a first portion of a chair frame which extends out the first mold cavity through the at least one opening of the first mold cavity and the at least one opening of the second mold cavity is configured to receive a second portion of the chair frame which extends out the second mold cavity through the at least one opening of the second mold cavity, at least one protrusion which extends into the second mold cavity wherein the at least one protrusion is configured to interact with the second portion of the chair frame to inhibit foam from entering the second portion of the chair frame.
14. The mold of claim 13 wherein the at least one protrusion is moveable to adjust an amount it extends into the second mold cavity.
15. The mold of claim 10 wherein the at least one protrusion is moveable along its axis.
16. The mold of claim 15 wherein the at least one protrusion is configured to interact with the second portion of the chair frame to inhibit foam from entering the second portion of the chair frame.
Description
BRIEF DESCRIPTION OF THE DRAWINGS
(1) FIG. 1 is a perspective view of a chair according to the present invention.
(2) FIG. 2 is a side view of the chair of FIG. 1
(3) FIG. 3A is a side view of part of the chair of FIG. 1 during manufacturing.
(4) FIG. 3B is a front view of part of the chair of FIG. 1 during manufacturing.
(5) FIG. 4 is a side view of the chair of FIG. 1 showing certain internal details in broken lines/cutaway/section.
(6) FIG. 5 is a perspective view of one mold used for making the chair of FIG. 1
(7) FIG. 6 is a perspective view of the mold of FIG. 5 without the chair frame piece therein.
(8) FIG. 7 is a top view of the mold of FIG. 5.
(9) FIG. 8 is a front view of the mold of FIG. 5.
(10) FIG. 9 is a perspective view of another mold for making the chair of FIG. 1 with a chair frame piece therein.
(11) FIG. 10 is a perspective view of the mold of FIG. 9 without the chair frame piece therein.
(12) FIG. 11 is a top view of the mold of FIG. 9.
(13) FIG. 12A is a front view of one frame piece of the chair of FIG.
(14) FIG. 12B is a side partial section view of a frame piece of the chair of FIG. 1.
(15) FIG. 12C is a detail view of FIG. 12B.
(16) FIGS. 13A-C show the assembly process of the two frame pieces of the chair of FIG. 1.
(17) FIG. 14 shows a rear view of one of the frame pieces of the chair of FIG. 1.
(18) FIG. 15 shows a perspective view of the chair of FIG. 1 with a rear mounted book holding accessory mounted thereon.
(19) FIG. 16 shows a rear view of the chair of FIG. 15.
(20) FIG. 17 shows a detail rear perspective view of the chair of FIG. 15.
(21) FIG. 18 shows a rear view of the chair of FIG. 15 with the books removed.
(22) FIG. 19 shows a cup holder for installation on the chair of FIG. 1
(23) FIG. 20 shows the cup holder of FIG. 19 mounted to the chair of FIG. 1
(24) FIG. 21 shows a detail view of FIG. 20.
(25) FIG. 22 shows the chair of FIG. 1 stacked with an alternative cup holder.
(26) FIG. 23 shows a top view of the cup holder.
(27) FIG. 24 shows a side view of the cup holder.
(28) FIG. 25 shows a top view of the cup holder with the cup removed.
(29) FIG. 26 shows four of the chairs of FIG. 1 connected and interlocked in a row.
(30) FIG. 27 shows a left side view of the chair of FIG. 1 with a book holder thereon.
(31) FIG. 28 is a perspective view of the front leg connector shown in FIG. 26.
(32) FIG. 29 is a top view of the front leg connector shown in FIG. 26.
DETAILED DESCRIPTION OF THE INVENTION
(33) Referring now to the drawings, wherein like reference numerals designate corresponding structure throughout the views. The following examples are presented to further illustrate and explain the present invention and should not be taken as limiting in any regard.
(34) As shown in FIG. 1-2, a chair 2 is provided with a bottom/seat 6 and a back 4. Legs 60 and 40 are provided to support the chair. The seat 6 and back 4 utilize an internal flexible support structure, an example of which is shown in FIG. 3A-B for the back support structure 42. As shown herein, the foam padding is injection molded around the flexible support structure. The rear legs 40 are spaced apart by support bar 46 (which may be considered a horizontal bar) which includes two protrusions 44 which extend approximately perpendicular to the support bar 46. The legs 40 as shown are bent rod or bar and include the bottom straight leg and the upper section by the back which is curved for an ergonomic fit. Top cross bar 48 holds the legs 40 spaced apart at the top end and also secure the straps 50 which hold the webbing/flexible support 42 in place during molding. The protrusions 44 insert into a generally horizontal part of the frame for the seat and front legs as shown in FIG. 4, particularly horizontal bar/tube 62 which is welded/connected to front leg 60 at attachment point 61. FIG. 4 shows this horizontal bar/tube 62 as a hollow support. As can be seen, this attachment point 61 is molded therearound in foam such that it is fully or at least partially surrounded in foam.
(35) FIGS. 5-8 show the mold for the rear legs/back of the chair. As can be seen, the rear frame 400 is placed in the mold. The straight part of the leg 40 and the protrusions 44 are located on the outside of the mold and the leg extends through channels 508/510 which when closed forms a circular/cylindrical opening that seals to the leg. The upper part of the rear frame 400 rests inside the mold cavity and the mold cavity is curved to fit the curved section 40′ of the frame 400. The flexible support structure 50/42 is provided within what will become the molded seat back. The webbing 42 is partially shown but it is understood that such webbing 42 would extend across the frame piece. The clip 50 is used to hold the webbing 42 in place when foam is introduced into the mold. The mold bottom 502 is hinged to the mold top 500 which closes to define the cavity. Registers 518/516 ensure proper alignment and hole 506 receives foam there through. Typically, a release agent will be applied to the inside of the mold, the frame 400 will be placed such that the leg 40 extends out of the mold and the top of the mold will be securely closed. Then, the foam is introduced through hole 506. As can be seen, the surface 514 and 512 of the mold is curved to provide the shape of the seat back. In certain aspects, the channels 510/508 include an o-ring or semi flexible sealing portion 5000 to seal against the rear leg 40 of the chair to inhibit foam from expanding out the channels when the mold is closed. In certain embodiments, close tolerancing is used to provide a seal which inhibits foam from exiting the mold. In particular aspects, the frame parts which are molded are finished prior to molding with their finish paint, powder coat or other coating. In addition, the protrusion 44 and bar 46 are located outside of the mold cavity when the mold is closed. This enables press fit assembly of the frame pieces after the foam is molded thereon.
(36) FIG. 9 shows the seat bottom mold with frame 6000 therein. As can be seen, the generally horizontal support 62 is positioned in the mold cavity and the generally vertical leg 60 extends out the bottom of the mold. Surfaces 902 and 904 of the mold define the upper and lower surface shapes for the foam. Foam is injected into hole 900 and clips 614 assist in holding the flexible support/webbing (not shown) in place during molding. FIG. 10 shows the mold with the frame 6000 removed. Registers 912/910 interact to ensure proper alignment of the mold halves when closed. Protrusion 908 is moveable along its axis by manipulation (e.g. rotation) of handle 916. The protrusion 908 is designed to fit into the end opening of the generally horizontal support 62 to inhibit foam from entering/filling that opening as the protrusions 44 of the rear seat frame half will insert into the horizontal support 62 in a press fit or other securing manner during final assembly. Plate/support 914 holds the rear end of the frame 6000 at the appropriate height to ensure correct molding of the foam. From the top view of the mold in FIG. 11, the holes 9000 can be seen. The legs 60 of the seat bottom frame half 6000 insert through these holes and then the mold is closed. As with the other mold half for the seat back/frame, the mold may be sprayed first with a release agent and handle 916 is then manipulated to insert protrusion 908 into the end of the generally horizontal frame piece 62. The mold is then securely closed and foam inserted via hole 900.
(37) Referring to FIG. 12A-C, the back upholstery 120 securing system is shown. A “C” channel 124 is secured to the bottom of the back and the cover 120 is placed there around. C clips 122 insert into loops 126 to hold the upholstery/cover 120 to the seat back.
(38) FIG. 13A-C shows the assembly process for the chair which also doubles as the process by which the seat bottom upholstery is secured. The upholstery cover includes tabs having loops 148 thereon and elongated members 150 at one end. The seat frame piece includes a rear bar 140 (which may be considered a horizontal bar) with a slot 142 therein. These loops 148 are fitted into the slot 142 and then the protrusions 44 are inserted into the supports 62 via press fitting. As the protrusions 44 are mounted to bar 46, as the protrusions are pressed into the supports 62, a face 1146 of the bar 46 presses against the upholstery cover at the loops 148. Then the loops and part of the upholstery cover becomes trapped between bar 46 and face 1140 of bar 140 and given that the elongated members 150 are also trapped in the loops 148, the loops cannot be pulled out of the slot 142 as the distance when assembled between the bar 46 and bar 140 is smaller than the thickness of the loops with the supports therein, more particularly, smaller than the thickness of the elongated members 150. In certain embodiments, the bar 46 contacts the upholstery cover on its outer surface and the bar 140 contacts the inner surface of the upholstery cover to effectively sandwich the upholstery cover between the bars 46/140. Instead of loops 148, hook and loop fastening could be used to secure the cover to the seat bottom.
(39) It is also understood that the cover is placed over the frame 6000 and includes holes for the legs 60 to extend out of.
(40) Referring to FIGS. 15-18, a book holder 150 is configure to attach to the rear legs 40 of the chair. This can be particularly useful in churches and places of worship in that large books 153 can be held on the back of the chair for the row behind that chair. The holder 150 secures to the leg with narrowing slot 151 and support 152 which is shaped like a nail head which is trapped in the narrowed portion of the slot 151 to inhibit movement downwards, side to side and backwards. To remove the holder 150, the holder is pressed up so that the nail head 152 can be aligned with the larger portion of the slot 151 and moved backwards. The holder 150 is generally U shaped or three sides of a square channel. Bar 154 provides additional rigidity to the U shaped cross section.
(41) An additional option of a cup holder is shown in FIGS. 19-21. The cup holder 200 has a connector with a U shaped 201 support which secures to bar 46 on the chair. The support 201 can include elastomeric/rubber/plastic molded teeth 202 and clip 203 to more securely hold the cup holder in place. In preferred embodiments, the cup holder 200 primarily metallic material. The upholstery cover in this instance may be secured to the chair bottom with a hook and loop closure system from two flaps which are secured together behind the bar 46. Such flaps would replace the loops 148 and overlap in the hook and loop securing embodiment.
(42) A smaller cup holder 220 can be slid up a leg of the chair, and depending upon where placed, can allow for stacking of the chair while the holder 220 is installed as shown in FIG. 22. The holder 220 includes a hole 222 which slides over the leg and is made from a plastic or elastomeric material to allow for sliding but to remain secure once in place. This holder 220 is especially useful for communion cups 221 and the like which are rather small.
(43) FIG. 26 provides for a number of chairs connected together in a row. The chair is provided with right 400 (FIG. 1) and left 401 (FIG. 27) connectors. Generally, the left 401 connector is generally of a nail head configuration and the right 400 connector slides over the nail head to inhibit lateral movement apart of the chairs. Front connector 402 is provided to control the front leg spacing between adjacent chairs. Generally, this connector is of a plastic material which may be rigid, semi-rigid or elastomeric. The C shaped ends 403 snap onto the legs to allow for easy insertion over the legs and secure clamping. Tabs 404 allow for easy removal of the connector 402. The spacing between the C shaped ends 403 can be adjusted based on the desired row curvature with longer spacing providing for straight rows whereas shorter spacing provides for curved rows because the front legs would be pulled closer together.
(44) Thus, the foregoing system provides for injection molding of foam around a support frame which already includes legs of the chair assembled thereto, the mold allows portions of the frame (e.g. legs) to exit the mold and remain free from (e.g. without) foam thereon. This allows the legs/frame to be finished with the powder coating, paint or other finish and the foam to then be injection molded around the frame. Very minimal post molding processing is required to finish the chair, for example, after both the seat and back are molded in foam and removed from the mold, the chair halves are pressed together in press fit engagement and the upholstery cover is added. In contrast, many seats presently available utilize a foam slab on a rigid plate which is upholstered and then secured to the frame, e.g. with screws. Thus, in the present case, the legs are already secured to the frame/seat support structure prior to adding the foam.
(45) Although the invention has been described with reference to a particular arrangement of parts, features and the like, these are not intended to exhaust all possible arrangements or features, and indeed many other modifications and variations will be ascertainable to those of skill in the art.
