U.S. patent number 3,639,001 [Application Number 04/865,043] was granted by the patent office on 1972-02-01 for metal core plastic chair.
This patent grant is currently assigned to Shell Oil Company. Invention is credited to Victor F. Anderson.
United States Patent |
3,639,001 |
Anderson |
February 1, 1972 |
METAL CORE PLASTIC CHAIR
Abstract
A composite furniture structure having an inner relatively rigid
load-supporting core frame at least partially covered by outer
decorative facing means, which are preferably molded from plastic.
The invention permits low-cost mass production of furniture of
various types and styles from the relatively simple modern styles
to highly ornate provincial styles.
Inventors: |
Anderson; Victor F. (Wenonah,
NJ) |
Assignee: |
Shell Oil Company (New York,
NY)
|
Family
ID: |
25344594 |
Appl.
No.: |
04/865,043 |
Filed: |
October 9, 1969 |
Current U.S.
Class: |
297/451.1;
248/188.8 |
Current CPC
Class: |
A47C
4/02 (20130101); A47D 1/023 (20170501); A47C
4/028 (20130101); A47C 7/405 (20130101) |
Current International
Class: |
A47D
1/00 (20060101); A47C 4/00 (20060101); A47C
4/02 (20060101); A47c 004/02 (); A47c 007/00 ();
A47c 007/20 (); B44f 009/02 (); E04c 002/20 () |
Field of
Search: |
;297/445,452-459,311,330
;52/574,730-732 ;287/103 ;248/188.8 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Nunberg; Casmir A.
Claims
What is claimed as new in support of Letters Patent is:
1. A composite furniture part comprising:
a relatively rigid core frame member;
decorative facing means, said facing means comprising an exterior
shell and a plurality of spaced interior ribs integral with the
interior of said shell, different wall portions of said shell being
in different planes whereby said shell has a hollow cross section
at least partially surrounding said relatively rigid core frame
member, said interior ribs being integral with and extending
between the said different wall portions of said shell, a portion
of said shell being open to expose a plurality of said interior
ribs, said exposed interior ribs having recessed edges adjacent the
open portion of said exterior shell, said recessed edges being
seated against said relatively rigid core frame member whereby said
interior ribs extend between said relatively rigid core frame
member and the said different wall portions of said shell to
support said wall portions; and
fastening means joining said relatively rigid core frame member and
facing means.
2. A composite furniture structure comprising:
a relatively rigid core frame including a pair of spaced and
generally parallel stiles and a crossmember extending between and
rigidly joined to said stiles;
decorative facing means comprising an exterior shell and a
plurality of spaced interior ribs integral with the interior of
said shell, said shell having different wall portions positioned in
different planes whereby said shell has a hollow cross section,
said interior ribs being integral with and extending between the
said different wall portions of said shell, a portion of said shell
being open to expose a plurality of said interior ribs, said
exposed interior ribs having recessed edges adjacent the open
portion of said exterior shell, said recessed edges being aligned
with one another to define a channel receiving said frame stiles in
a manner such that said facing means at least partially covers said
relatively rigid core frame whereby said interior ribs extend
between said relatively rigid core frame member and the said
different wall portions of said shell to support said wall
portions; and
fastening means joining said facing means and relatively rigid core
frame.
3. A decorative facing member for a composite furniture
construction comprising:
an exterior shell having a plurality of spaced interior ribs
integral with the interior of said shell, said shell having
different wall portions positioned in different planes whereby said
shell has a hollow cross section, said interior ribs being integral
with and extending between the said different wall portions of said
shell, a portion of said shell being open to expose a plurality of
said interior ribs, said exposed interior ribs having recessed
edges adjacent the open portion of said exterior shell, said
recessed edges being aligned with one another to define a channel,
said channel being adapted to receive a relatively rigid frame
member whereby said interior ribs are adapted to extend between
said relatively rigid frame member and the said different wall
portions of said shell to support said wall portions.
4. A composite furniture part according to claim 1 wherein:
said facing means comprises a pair of complementary facing sections
applied to opposite sides of said relatively rigid core frame
member in a manner such that the exterior shells of said facing
sections completely surround said relatively rigid core frame
member, and each of said facing sections being joined to said
relatively rigid core frame member by a fastening means.
5. A composite furniture part according to claim 1 wherein:
said facing means comprises an elongated molded plastic sleeve
section having said interior ribs in planes normal to and spaced
along the longitudinal axis of said sleeve section, and the
recessed edges of said interior ribs being aligned lengthwise of
the section to define a channel receiving said relatively rigid
core frame member, said relatively rigid core frame member being
tubular.
6. A composite furniture part according to claim 2 wherein:
said facing means comprises a pair of facing sections disposed with
their open portions in confronting face-to-face relation at
opposite sides of said relatively rigid core frame so as to
completely encase said core frame.
7. A composite furniture part according to claim 2 wherein:
said relatively rigid core frame comprises a back frame part for a
chair; and
said facing means comprises a molded plastic facing section having
facing stiles extending along the stiles of said relatively rigid
core frame and a panel extending between said facing stiles to form
a backrest.
8. A composite furniture part according to claim 2 wherein:
said facing means comprises a pair of molded plastic facing
sections disposed with their open portions in confronting
face-to-face relation at opposite sides of said relatively rigid
core frame in a manner such that the exterior shells of said facing
sections completely encase said relatively rigid core frame;
and
said fastening means comprise fastening elements secured to said
facing sections and projecting through aligned holes in said
relatively rigid core frame and the other facing section.
9. A composite furniture part according to claim 5 wherein:
said fastening means comprises a fastening element projecting from
the wall of said channel through a hole in said relatively rigid
core frame member.
10. A composite furniture part according to claim 4 wherein:
said facing sections comprise molded plastic facing sections;
and
said fastening means comprises a fastening element secured to one
of said facing sections and projecting through aligned holes in
said relatively rigid core frame member and the other facing
section.
11. A composite furniture part according to claim 6 wherein:
said facing sections comprise molded plastic facing sections.
12. A composite furniture part according to claim 2 wherein:
said facing means comprises a molded plastic facing section applied
to one side of said relatively rigid core frame; and
said fastening means comprise fastening elements secured to said
facing section and projecting through holes in said relatively
rigid core frame.
13. A chair comprising:
a back frame part including a relatively rigid rear core frame
having a pair of spaced and generally parallel stiles and a
crossmember extending between and rigidly joined to said stiles,
the lower ends of said stiles forming rear legs;
a front frame part including a relatively rigid front core frame
having a pair of spaced and generally parallel stiles forming front
legs and a crossmember extending between and rigidly joining the
upper ends of said front legs;
a seat joined to said core frames at the upper ends of said
legs;
rear decorative facing means secured to said rear core frame so as
to cover at least the front side of said rear frame above seat
level; and
front decorative facing means secured to said front chair legs so
as to cover at least the front sides of said front legs.
14. A chair according to claim 13 wherein:
said rear facing means comprises stiles extending downwardly along
and covering the front sides of said rear chair legs.
15. A chair according to claim 13 wherein:
said rear facing means comprises front and rear molded plastic
facing sections secured in confronting face-to-face relation to the
front and rear sides of said rear core frame; and
said front facing means comprise front and rear molded plastic
facing sections secured in confronting face-to-face relation to the
front and rear sides of said front chair legs.
16. A chair according to claim 15 wherein:
said rear facing sections comprise stiles extending downwardly to
the lower ends of said rear chair legs at the front and rear sides
of the latter legs.
Description
REFERENCE TO COPENDING APPLICATIONS
Reference is made herein to applicant's copending application, Ser.
No. 797,616, filed Feb. 7, 1969, and entitled BIPARTITE TUBULAR
MOLDED PLASTIC FURNITURE PART WITH INTERNAL REINFORCEMENT, now
abandoned
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates generally to furniture and more particularly
to a composite furniture structure whose load-supporting capability
is furnished by a relatively rigid inner reinforcing core frame and
whose surface styling features are furnished by external facing
means secured to, and at least partially covering, the reinforcing
core frame.
2. Prior Art
At the present time, most articles of furniture, such as chairs,
tables, and the like, are fabricated from metal or wood and are
composed of a number of separate pieces which are individually
shaped by machine and then joined to one another with the aid of
glue, screws, welds, or the like, while the pieces are held in
assembled relation with jigs or clamps. This method of fabrication
is quite laborious and lends itself to only limited mass production
techniques. As a consequence, furniture produced by the existing
fabrication methods, particularly furniture provided with
relatively ornate surface features, tends to be quite costly.
Recent developments in plastic materials and plastic molding
techniques have made possible the mass production of plastic
furniture which is practical, aesthetically pleasing, and
increasing in popularity and demand. A primary advantage of plastic
furniture over conventional wooden furniture resides in the fact
that virtually any design feature, from the very simple to the very
ornate, may be economically mass produced by plastic forming
techniques. Moreover, the surface coloring and texture of plastic
furniture may be readily varied to simulate virtually any furniture
wood and surface finish.
While plastics may be economically molded or otherwise formed to
provide ornamental surface features for furniture, their material
cost is relatively high as compared to the presently used wood and
metallic furniture materials. As a consequence, the production of
plastic furniture presents the problem of minimizing the quantity
of plastic used while providing the furniture with sufficient
load-supporting strength for its intended use. One solution to this
problem is disclosed in the earlier mentioned, copending
application, Ser. No. 797,616. According to the invention disclosed
in that application, load-supporting furniture members, such as
legs, are provided with a hollow cross section and with internal,
reinforcing formations which are molded integrally with the
members. The present invention provides an alternative solution to
the problem.
SUMMARY OF THE INVENTION
According to the present invention, the above-stated problem of
minimizing the plastic content of plastic furniture while providing
adequate structural strength is resolved by providing the
load-carrying furniture parts with a composite construction,
including a relatively rigid, inner reinforcing core frame of wood
or metal and an outer decorative facing means of plastic or other
readily formable material. The inner core frame provides the
primary load-supporting member, and the outer decorative facing
means provides the surface styling features. These features may be
formed in the facing means by molding or other suitable forming
techniques. In the disclosed embodiment of the invention, the
facing means comprise relatively thin-walled, shell-like molded
plastic parts or sections which fit about and are secured to the
inner load-supporting core frame.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a chair embodying the
invention;
FIG. 2 is a perspective view of a modified chair configuration
according to the invention;
FIG. 3 is a perspective view of a further modified chair
configuration according to the invention;
FIG. 4 is an exploded perspective view of the chair in FIG. 1;
FIG. 4a is an enlarged section taken on line 4a--4a in FIG. 4;
FIG. 5 is an enlarged fragmentary vertical section through the
chair seat in FIG. 1;
FIG. 6 is a plan view of a modified load-supporting base for the
chair seat;
FIG. 7 is a section taken on line 7--7 in FIG. 6;
FIG. 8 is a plan view of a further modified load-supporting base
for the chair seat;
FIG. 9 is a section taken on line 9--9 in FIG. 8;
FIG. 10 is a rear view of the chair in FIG. 1 with a rear
decorative facing section of the chair omitted for the sake of
clarity;
FIG. 11 illustrates one method of attaching the decorative facing
means and core frame of the chair;
FIG. 12 is a side view of FIG. 11;
FIG. 13 is a section taken on line 13--13 in FIG. 11;
FIG. 14 is an alternative method of attaching the decorative facing
means and core frame;
FIG. 15 is a side view of FIG. 14;
FIG. 16 is a section taken on line 16--16 in FIG. 14;
FIG. 17 illustrates still another method of attaching the
decorative facing means and core frame;
FIG. 18 is a section taken on line 18--18 in FIG. 17;
FIG. 19 is an enlarged axial section through the lower end of one
of the chair legs;
FIG. 20 is a perspective view of a high chair embodying the
invention;
FIG. 21 is an exploded perspective view of the high chair; and
FIGS. 22 and 23 illustrate the manner in which the high chair may
be collapsed when not in use.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIGS. 1, 4 and 5 illustrate a chair 10 embodying the invention. The
chair has composite back frame and front frame structures 12 and
14, and a seat 16 secured to these frame structures. The back frame
structure 12 includes an inner, relatively rigid, load-supporting
core frame 18, an outer decorative facing means 20 enclosing the
frame. Frame 18 has a pair of spaced, and generally parallel,
stiles 22 rigidly joined by a cross brace 24. In this instance, the
frame 18 is constructed of metal tubes which are welded to one
another. However, it is considered to be within the scope of the
invention to construct the frame of other suitable material, such
as wood. The upper ends 22A of the frame stiles 22 above the cross
brace 24 form part of a backrest. The lower ends 22B of the stiles
below the cross brace 24 form rear legs.
Decorative facing means 20 is composed of two generally
complementary facing sections 20A, 20B. These facing sections are
secured face to face to opposite sides of the frame 18. The front
facing section 20A has a pair of spaced and generally parallel
stiles 28 and an intervening panel section 32. The facing stiles 28
extend along the front sides of the frame stiles 22. The panel
section 32 extends between the upper ends of the facing stiles
above the seat 16. Formed in the rear sides of the facing stiles 28
are rearwardly opening channels 34 for receiving the frame stiles
22. Accordingly, when the front facing section 20A is applied to
the core frame 18, the facing section surrounds and covers the
front sides of the frame stiles.
The rear facing section 20B is similar to the front facing section
20A and includes stiles 36 and an intervening panel section 38
extending between the upper ends of the stiles. The front sides of
the facing stiles 36 have open channels 42 for receiving the frame
stiles 22. The depth of these channels is such that when the front
and rear facing sections 20A, 20B are applied to the core frame 18,
the confronting front and rear edges of the facing sections abut
one another. The facing stiles 28, 36 then completely surround or
encase the frame stiles 22. The facing sections are preferably
injection molded from plastic and are secured to the frame 18 by
fastening means to be described presently.
The front frame part 14 of the chair 10 has a core frame 48 of
generally inverted U-shape This frame, like the rear core frame 18,
may be constructed of any suitable material, but is preferably
fashioned from metal tubing. The front core frame includes a pair
of stiles 50 rigidly joined at their upper ends by a crossmember
52. Stiles 50 provide the front chair legs. Covering the stiles are
decorative facing means or sleeves 54 which are split
longitudinally into separate front and rear facing sections 54A,
54B. According to the preferred practice of the invention, these
facing sections, like the facing sections of the rear frame part
12, are injection molded from plastic. The facing sections 54A, 54B
are secured to the front frame stiles 50 in the manner to be
explained presently.
The chair seat 16 has a relatively rigid load-supporting base 56
which may be constructed of various materials, but, again, is
preferably injection molded from plastic. This base is firmly
attached to the crossmembers 24, 52 of the rear and front core
frames 18, 48. In the particular embodiment shown, these
crossmembers have a generally V-shape and project from their
respective core frames across the under side of the seat base 56 in
a common, generally horizontal plane. The base is firmly attached
to the crossmembers by screws 58 or any other convenient manner.
Secured to the upper side of the base is a seat cushion 60. Fixed
to the upper side of the base 56 is an upholstered seat cushion
59.
The seat base 56 in FIG. 5 is a simple flat plate, which may be
wood. FIGS. 6 and 7 illustrate a modified seat base 56A which may
be formed from sheet metal. FIGS. 8 and 9 illustrate a molded
plastic seat base.
FIG. 1 illustrates the completed chair 10. It should be understood,
of course, that the styling of the chair is purely illustrative and
may be varied by changing the shape of the various chair parts
and/or by changing the surface contours and surface features of the
core frame facing means. FIGS. 2 and 3, for example, illustrate
alternative chair configurations according to the invention.
In FIG. 2 the front facing section 20A' is applied to the rear core
frame 18 to form a backrest for the chair. The stiles 28' of the
facing section 20A' terminate approximately at seat level. The
chair configuration of FIG. 3 is similar to that of FIG. 2 except
that the stiles of the front facing section are extended downwardly
to the lower ends of the rear frame stiles 22. In other words, the
chair of FIG. 2 uses only the front facing section 20A of the chair
10 shown in FIG. 1. In each of the chairs of FIGS. 2 and 3, the
rear frame stiles are partially exposed and thus must be
appropriately finished. In the chair of FIG. 1, the rear facing
section 20B is applied to the rear side of the rear core frame 18
so that this frame is totally encased by the front and rear facing
sections. There is thus no need to finish the frame. Only the front
facing section 54A, or both the front and rear facing sections 54A,
54B, may be applied to the front core frame stiles 50, or these
facing sections may be omitted as in FIGS. 2 and 3, depending upon
whether the frame stiles are to be totally exposed or partially or
totally encased in the same manner as the rear core frame stiles.
Glides 61 (FIG. 19) may be attached to the lower ends of the core
frame stiles to prevent the lower ends of these stiles from marring
the floor.
As noted earlier, the facing sections 20A, 20B and 54A, 54B of the
frame parts 12, 14 may be secured in various ways to their
respective core frames 18, 48.
FIGS. 11-18 illustrate certain preferred methods of accomplishing
this attachment. FIGS. 11-16 illustrate attachments which may be
used when only the front facing sections are applied to the core
frames. In FIGS. 11-13, the front facing section (20A) is secured
to the core frame (18) by screws. In FIGS. 14-16, the front facing
section is formed with integral molded lugs 62 which project
through aligned holes 64 in the core frame and have their
protruding ends upset by the application of heat and pressure to
permanently secure the facing section to the frame. When both the
front and rear facing sections are applied to the core frames, the
lugs 62 on the front facing sections are longitudinally dimensioned
to project through aligned holes in both the frame and rear facing
section, as shown in FIGS. 17 and 18. Other possible methods of
attachment are press fit pins in the facing sections and solvent or
ultrasonic welding of the abutting surfaces of the facing
sections.
FIGS. 20-23 illustrate a high chair 100 embodying the features of
the invention. This high chair has front and rear frame parts 102,
104 joined by a seat 106. The frame parts 102, 104 are basically
similar in construction to those of the earlier described chair,
and thus need not be explained in detail. Suffice it to say, that
the rear frame part 102 has a tubular core frame 110 covered by
front and rear molded plastic facing sections 112A, 112B.
Similarly, the front frame part 104 has a tubular core frame 114
covered by front and rear facing sections 116A, 116B. According to
the preferred practice of the invention, the seat 106 is pivotally
attached by pins 122 to the stiles of the rear and front core
frames 110, 112 to permit folding of the chair, in the manner
illustrated in FIGS. 22, 23, for convenience of storage when not in
use.
The high chair also includes a tray 124 having sidearms 126. The
rear ends of these arms are pivotally attached to the rear core
frame stiles to permit the tray to be raised and lowered, as shown.
When in its lower position of use, the tray rests on the upper ends
of the front core frame stiles.
It will be observed that in each illustrated chair, the central
panel section or sections of the rear frame facing means (i.e.,
items 32, 38 in FIG. 4) form a backrest. This backrest may be
molded integrally with the rear facing stiles or separately and
then secured to the stiles.
As clearly illustrated in the various figures of the drawings, the
facing sections of the illustrated furniture have a ribbed hollow
core construction and a generally uniform wall thickness
throughout. This construction is desirable for the reason that it
reduces the plastic content and hence cost of the facing sections
and yet provides the sections with more than ample structural
strength to support the loads they encounter in use. This
load-supporting strength is particularly important to the plastic
backrest panel and top rail which extend between the rear facing
stiles. Particular attention is directed to the ribbed hollow core
construction of the facing sections or sleeves which cover the
stiles of the front and rear core frames. These facing sections or
sleeves will be seen to have gussetlike reinforcing ribs disposed
in planes normal to the longitudinal axes of and spaced generally
uniformly along the sections. The exposed edges of these ribs or
gussets have generally semicircular recesses which together
constitute the core frame stile receiving channels (i.e., channels
34, 42 in FIGS. 1, 4, 5) of the facing sections.
* * * * *