U.S. patent number 3,797,885 [Application Number 05/267,422] was granted by the patent office on 1974-03-19 for seat type article of furniture and method of manufacturing.
This patent grant is currently assigned to Prestige Furniture Corporation. Invention is credited to Edward W. Harman, Marvin R. Leatherman.
United States Patent |
3,797,885 |
Harman , et al. |
March 19, 1974 |
**Please see images for:
( Certificate of Correction ) ** |
SEAT TYPE ARTICLE OF FURNITURE AND METHOD OF MANUFACTURING
Abstract
A chair having a base and a shell, with the base providing the
seat bottom and the shell providing the sides and back of the seat.
The base has a flat top portion that forms the seat bottom and has
a continuous outer rigid rim that seats in a continuous downwardly
and inwardly facing recess in a rigid bottom rim of the shell, with
the sides of the base top portion being completely contained within
the shell rim recess so that no upholstering or finishing of the
base top portion sides is necessary. The chair is manufactured by
separately forming the base and shell, the latter preferably being
molded of plastic, and separately upholstering the shell with edges
of the upholstery covering layer conveniently secured in the
aforementioned recess and securing a seating structure in the base
with a covering layer that has edges secured to the rim; the base
and shell are then assembled by seating the base rim in the shell
recess with the upholstery covering layer edges and seating
structure covering layer edges desirably disposed out of sight in
the shell recess, and with the shell completely encompassing the
base rim for firm securement of the shell on the base.
Inventors: |
Harman; Edward W. (Maiden,
NC), Leatherman; Marvin R. (Newton, NC) |
Assignee: |
Prestige Furniture Corporation
(Newton, NC)
|
Family
ID: |
23018708 |
Appl.
No.: |
05/267,422 |
Filed: |
June 28, 1972 |
Current U.S.
Class: |
297/445.1;
297/DIG.1; 297/411.41; 297/452.34 |
Current CPC
Class: |
A47C
1/02 (20130101); A47C 4/028 (20130101); A47C
4/02 (20130101); Y10S 297/01 (20130101) |
Current International
Class: |
A47C
4/02 (20060101); A47C 1/02 (20060101); A47C
4/00 (20060101); A47c 007/54 (); A47c 007/00 () |
Field of
Search: |
;297/418,419,445,452,454-460,DIG.1,DIG.2 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Nunberg; Casmir A.
Attorney, Agent or Firm: Richards, Shefte & Pinckney
Claims
We claim:
1. A seat type article of furniture comprising a base for
supporting the article on a floor or the like and having a
substantially flat top portion that forms a seat bottom and has a
continuous outer rigid rim of predetermined peripheral
configuration, and a shell mounted on said base and forming the
front, sides and back of the article, said shell being open in the
center thereof for exposure of said seat bottom therethrough and
having a rigid bottom rim with a downwardly and inwardly facing
continuous recess formed therein in a configuration that conforms
to said base rim configuration for completely encompassing said
base rim to secure said shell on said base.
2. A seat type article of furniture according to claim 1 and
characterized further in that said shell rim recess terminates
upwardly in a downwardly facing inwardly extending shoulder that
extends over and seats on said base rim for support of said shell
on said base.
3. A seat type article of furniture according to claim 1 and
characterized further in that said shell rim extends downwardly to
the bottom of said base top portion to cover completely the side of
said top portion.
4. A seat type article of furniture according to claim 3 and
characterized further in that the visible surfaces of said shell
are covered with upholstery material and said base top portion side
is not covered with upholstery material.
5. A seat type article of furniture according to claim 1 and
characterized further in that the visible surfaces of said shell
are covered with upholstery material that has edges secured to said
shell in said recess.
6. A seat type article of furniture according to claim 1 and
characterized further in that said base has a seating structure
that forms said seat bottom and is supportingly secured to said
base top portion rim with a layer of covering material extending
over said seating structure and having its edges secured to said
base rim within said shell rim recess.
7. A seat type article of furniture according to claim 6 and
characterized further in that the visible surfaces of said shell
are covered with upholstery material that has edges secured to said
shell in said recess.
8. A seat type article of furniture according to claim 1 and
characterized further in that said shell is formed of molded rigid
plastic material.
Description
BACKGROUND OF THE INVENTION
The present invention relates to a seat type article of furniture
and method of making the same, and more particularly to a seat type
furniture article made from a base and a shell that are formed
separately and then assembled to provide the finished article.
Separately formed shell and base type chairs, sofas and the like
have been developed for purposes of design versatility and
manufacturing convenience, which advantages are especially
attainable where the shell is made of molded plastic, such as
polyurethane. A typical example of this type of furniture is
disclosed in Kuhlmann U.S. Pat. No. 3,471,199, issued Oct. 7, 1969,
for Two Piece Seating Furniture Construction, which shows a chair
having a lower body of synthetic foam material that defines an
occupant receiving well that includes side and back portions, and
an upper body of synthetic foam material having side and back
portions that define arm and back supporting surfaces, from which
depending portions extend for nesting inwardly on the side and back
of the lower body. Position locking key members are included
between the upper and lower bodies to prevent relative horizontal
movement, which would otherwise be readily possible because the
bodies are in contact only at the sides and back. There is a degree
of versatility possible with this type of construction, but because
the lower body is formed with sides and a back there is a
limitation to the variations possible and exterior upholstering of
the exposed lower body sides and back is required. Furthermore, the
resulting well of the lower body makes interior upholstering or
covering difficult.
In contrast, the present invention provides a shell and base type
chair, sofa or the like wherein the base forms only the seat
bottom, with the shell forming the entire front, sides and back,
thereby allowing substantially unlimited versatility of shell
designs adaptable to use on a single base design. Furthermore, the
shell completely encompasses the rim of the base for firm
securement and without allowing horizontal movement even without
screws or special locking elements, and the shell may be made to
extend downwardly to cover completely the sides of the base top
portion so that no exterior upholstering or covering of the base is
necessary. Also, upholstery material can be easily secured to the
shell and a seat structure secured to the base independently before
the shell and base are assembled and without dealing with recessed
configurations and with the edges of the upholstery covering and
seat structure covering being conveniently located out of sight at
the respective nesting surfaces of the shell and base.
SUMMARY OF THE INVENTION
Briefly described, the seat type article of furniture of the
present invention has a base and a shell, preferably molded rigid
plastic material, mounted on the base. The base supports the
article on a floor or the like and has a substantially flat top
portion that forms a seat bottom and has a continuous outer rigid
rim of a predetermined peripheral configuration. The shell, on the
other hand, forms the front, sides and back of the article and is
open in the center for exposure of the seat bottom therethrough.
The shell has a rigid bottom rim with a downwardly and inwardly
facing continuous recess formed therein in a configuration that
conforms to the base rim configuration for completely encompassing
the base rim.
Preferably, the shell rim recess terminates upwardly in a
downwardly facing inwardly extending shoulder that extends over and
seats on the base rim for support of the shell on the base, and the
shell rim extends downwardly to the bottom of the base top portion
to cover completely the side of the top portion, which need not be
covered with upholstery material.
Also, in the preferred embodiment the visible surfaces of the shell
are covered with upholstering material that has edges secured in
the shell recess, and a seating structure is supportingly secured
to the base top portion rim with a layer of covering material
extending over the seating structure and having its edges secured
to the base rim within the shell rim recess.
According to the method of manufacture of the present invention, a
seat type article of furniture is manufactured by separately
forming the above-described shell and base constructions and then
assembling the shell and base by seating the base rim in the shell
recess with the shell rim completely encompassing the base rim.
Preferably, the shell is separately formed by molding it from
plastic material. The preferred method also includes applying
upholstery material to the shell and a seating structure to the
base prior to assembling of the shell and base, while securing
edges of a covering layer of the upholstery material in the shell
recess and edges of a covering layer of the seating structure to
the base rim so that these edges and their securement will be
obscured within the shell recess upon subsequent assembly of the
shell base.
In the preferred embodiment of the method of the present invention,
the separate forming of the shell includes forming of the shell
recess to a depth sufficient for the sides of the base top portion
to be substantially completely received in the recess and thereby
hidden upon assembly of the shell and base and assembly is
performed without applying any upholstery or covering material to
the sides of the base top portion.
Thus, the present invention provides a simplicity of construction
and a versatility of design in a firm structure that can be made in
an easy and inexpensive method.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a chair incorporating the preferred
embodiment and made according to the preferred method of the
present invention;
FIG. 2 is a vertical sectional view in perspective of the shell of
the chair of FIG. 1 as viewed in a lateral plane;
FIG. 3 is a vertical sectional view of the shell of FIG. 1 as
viewed in a longitudinal plane, and showing the top portion of the
base in phantom lines and separated from the shell;
FIG. 4 is an exploded perspective view, partially broken away, of
the chair of FIG. 1;
FIG. 5 is a bottom view of the shell of the chair of FIG. 1 prior
to applying upholstery material thereto;
FIG. 6 is a view similar to FIG. 5, but showing the shell after
upholstery material has been applied thereto; and
FIG. 7 is a perspective view of the base of the chair of FIG. 1
prior to applying the covering layer to the seating structure shown
therein.
DESCRIPTION OF THE PREFERRRED EMBODIMENT
In the preferred embodiment of the present invention illustrated in
the accompanying drawings, the seat type article of furniture is in
the form of a chair 10 having the exterior appearance of a
conventional upholstered chair that has a front 12, sides 14, and a
back 16 that surround a seat bottom 18 on which is supported a seat
cushion 20. A back cushion 22 rests against the chair back 16 and
on the rear of the seat cushion 20. The chair 10 is supported on
legs 24 extending downwardly from the four corners of the chair
10.
As seen in FIG. 4, the chair 10 is primarily the combination of a
base 26 and a shell 28, with the base 26 serving as support for the
article on a floor or the like and providing the seat bottom 18,
and with the shell 28 providing the upholstered front 12, sides 14,
and back 16 of the chair 10.
The base 26 is formed with a flat top portion 30 that has a
continuous outer rigid rim 32 of a predetermined peripheral
configuration. This rim 32 provides structural support for the
chair 10 and has the legs 24 secured thereto and depending
thereform. Corner braces 34 secured to the inside of the rim 32
increase the structural strength of the base 26.
The base 26 supports a seating structure 36 across its flat top,
which seating structure 36 forms the seat bottom 18 of the chair
10. This seating structure 36, in the embodiment illustrated, is of
a conventional construction, having a plurality of longitudinally
extending sinuous springs 38 that are secured in brackets 40 at the
front and rear of the base rim 32. These springs 38 bow upwardly
and are interconnected against lateral spreading by a cross tie
wire 42. A fabric net 44 covers the springs 38 and has its edges
conventionally tacked or otherwise secured in the base rim 32 from
support thereon of a cotton batting pad 46, over which is disposed
a layer of covering material 48 of fabric or vinyl plastic that has
its edges 50 pulled over the upper edge of the base rim 32 and
secured, as by tacks 52, staples, glue or other securing means, to
the side of the flat top portion 30 of the base 26 adjacent the top
thereof.
The shell 28 is constructed for mounting on the base 26 and is open
in its center for exposure of the seat structure 36 of the base 26
that forms the aforementioned seat bottom 18 of the chair 10. The
shell 28 is formed with a rigid bottom rim 54 that has a downwardly
and inwardly facing continuous recess 56 formed therein and a
configuration that conforms to the configuration of the base rim 32
so that the shell rim 54 will completely encompass the base rim 32
when the shell 28 and base 26 are assembled to secure the shell and
base together. The shell rim recess 56 terminates upwardly in a
downwardly facing inwardly extending shoulder 58 that extends over
and seats on the base rim 32 for further support of the shell on
the base, and the shell rim 54 extends downwardly sufficiently so
that when the shell and base are assembled the shell rim 54 will
extend to the bottom of the base top portion 30 to cover completely
the side 60 thereof.
The surfaces of the shell 28 that are visible in the assembled
chair are covered with upholstery material 62 that includes a
cushioning layer 64 of soft urethane, foam rubber or any other
suitable soft resilient material that is glued or stapled to the
shell surface. The upholstery material 62 also includes a covering
layer of fabric, vinyl plastic or any other suitable material that
may be of a stretch or non-stretch characteristic. This covering
layer 66 has its edges 68 secured, as by tacks 70, staples, glue or
other securing means, within the shell rim recess 56.
In practicing the preferred embodiment of the method of the present
invention, the base 26 and shell 28 are separately formed
completely prior to assembly so that the forming and upholstering
can be conveniently accomplished without the difficulty normally
involved when the entire chair structure is constructed at one
time.
In the illustrated embodiment, the flat top portion 30 of the base
26 is constructed of wood, but it can be made of bent plywood,
molded plastic, machined plastic, molded cardboard, or any other
suitable material, and because it is made separately from the shell
28 it need not be made of the same material as the shell 28. Also,
in the illustrated embodiment the legs 24 are made of wood and are
secured to the inside of the base rim 32. In place of wooden legs,
metal legs can be used and in place of legs, swivels, rockers,
swivel-rockers or any other supporting elements can be used.
After the base rim 32 is constructed, the aforementioned seating
structure 36 is applied by attaching the springs 38 in the brackets
40, applying the tie wire 42, net 44, pad 46, and layer 48 of
covering material, with the edges 50 of the covering material layer
48 being pulled over onto the side 60 of the flat top portion 30
and tacked or otherwise secured thereto conveniently in the area
that will be received within the shell recess 56 and, therefore,
will be located out of sight when the base and shell are
assembled.
Other conventional seating structures may be used in place of this
particular spring arrangement. Thus, coil springs, pre-assembled
drop-in units, rubber webbing, rubber or canvas decking, woven wire
mesh, or any other suitable constructions can be used.
The shell 28 is also completely formed separately prior to assembly
with the base 26. Preferably, the shell 28 is formed by molding
urethane or styrene plastic into the configuration of the shell to
provide a rigid supporting structure of a desired configuration and
upon which upholstery material can be readily applied. This shell
28 is formed to provide the aforementioned front 12, sides 14, and
back 16 of the chair 10 and with an open center for exposure of the
seat bottom 18 upon subsequent assembly of the shell and base. The
shell 28 is also formed with the aforementioned downwardly and
inwardly facing continuous recess 56 in a configuration that
conforms to the configuration of the base rim 32.
The aforementioned upholstery material 62 is then applied to the
shell 28 prior to assembly of the base and shell by applying with
glue, such as a latex type, or by stapling a layer 64 of soft
urethane or other similar material and then applying a covering
layer 66 of fabric or vinyl plastic over the cushioning layer 64
and attaching the edges 68 by tacks 70 or otherwise within the
shell rim recess 56.
By forming the base 26 and shell 28 separately and completely
before assembling, the problem of upholstering is relatively simple
in that there are no signigicant interior angles or wells within
which material must be attached. Rather, the edges of the
upholstery and seating structure materials can easily be pulled
around into the shell rim recess 56 or onto the base rim side 60.
This simplified operation is further enhanced by the forming of the
base 26 to provide the seat bottom only and not part of the sides
and back which are completely formed by the shell 28.
After the base 26 and shell 28 are separately formed as described
heretofore, they are assembled by placing the shell 28 onto the
base 26 with the base rim 32 being received within the shell rim
recess 56 to the extent that the shell rim 54 seats against the
shell rim recess shoulder 58 and the base rim side 60 is
substantially completely contained within the shell rim recess 56
so as to be out of sight. Because of the continuous extent of the
shell rim recess 56, the shell 28 completely encompasses the base
top portion 30, which not only results in the base top portion
being hidden from view but also results in firm securement of the
shell 28 on the base 26 without possible horizontal relative
movement and with sufficient resistance to vertical separation that
additional securing means may not be necessary. However, for added
securement screws, bolts, sonic welding or gluing may be utilized,
or dimensioning to obtain a friction fit may be used to effect firm
securement.
As the base 26 is substantially hidden from view, a variety of
shell designs and coverings can be adapted for use with a single
base design and vice versa, thereby allowing a wide range of chair
styles with a relatively small inventory and maufacturing expense.
Moreoever, the manufacture is easy to accomplish due to the
separate forming of the base and shell that minimizes complicated
operations, particularly in regard to upholstering the parts and
mounting the seating structure.
It should be understood that the foregoing detailed description and
accompanying drawings disclose only the preferred embodiment of the
present invention and that it is applicable to seat type articles
of furniture other than chairs of the type illustrated and is
capable of variation and modification without limitation to the
present specification, except as defined in the appended
claims.
* * * * *