U.S. patent number 3,671,984 [Application Number 05/161,643] was granted by the patent office on 1972-06-27 for upholstery edging.
This patent grant is currently assigned to Northern Fiber Products Company. Invention is credited to Jere B. Ambrose.
United States Patent |
3,671,984 |
Ambrose |
June 27, 1972 |
UPHOLSTERY EDGING
Abstract
An upholstery edging formed of a thin, narrow relatively stiff,
linearly oriented polypropylene fiber, randomly oriented, cloth
strip, which is stretch resistant in all of its planar directions,
stitched to and extending the length of an edge of an upholstery
cover fabric which is to be fastened to another element, with the
strip being double bent along the line of stitches to form a double
ply, and with the free edge of the outer ply being bent over into a
continuous tubular portion for receiving an elongated stiffening
rod therein.
Inventors: |
Ambrose; Jere B. (Pontiac,
MI) |
Assignee: |
Northern Fiber Products Company
(Birmingham, MI)
|
Family
ID: |
22582093 |
Appl.
No.: |
05/161,643 |
Filed: |
July 12, 1971 |
Current U.S.
Class: |
5/402; 5/409;
297/452.16; 297/452.59 |
Current CPC
Class: |
B68G
7/10 (20130101); B32B 5/245 (20130101); B60N
2/707 (20130101); B32B 2601/00 (20130101) |
Current International
Class: |
B60N
2/70 (20060101); B68G 7/10 (20060101); B68G
7/00 (20060101); B32b 003/24 (); A47c 027/08 () |
Field of
Search: |
;297/218,219,226,253,452,457 ;5/353.1,353.2,353.7 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Nunberg; Casmir A.
Claims
Having fully described an operative embodiment of this invention, I
now claim:
1. An edging strip for upholstery cover fabric covering a seat-like
base structure and having long, free edges to be fastened to
adjacent elements of the upholstery structure comprising:
a continuous, long, narrow, randomly oriented, non-woven, fiber
strip which is relatively smooth and stiffer than the upholstery
fabric and is characterized by resisting stretching in all of its
planar directions;
said strip being arranged along and overlapping an edge of the
fabric and stitched thereto by a continuous line of stitches;
the strip being double bent at the line of stitches to form
overlapped plys, with the inner ply being in face to face contact
with the fabric edge portion between the line of stitches and the
adjacent fabric edge, and the outer ply overlapping the inner ply
and extending outwardly of the edge thereof;
the free edge of the outer ply being bent into a continuous tubular
portion for receiving an elongated stiffening rod inserted
therein;
wherein the outer ply may be fastened, adjacent its rod receiving
portion, to another element for securing the upholstery edge
thereto, and the double bent strip reinforces, stiffens the edge
of, and prevents puckering and wrinkling of the fabric.
2. An edging strip as defined in claim 1, and said strip being
centrally bent approximately in half along its length direction,
wherein each of said plys is formed of a double thickness;
and said tubular portion being formed by the centrally bent
portion.
3. An edging strip as defined in claim 1, and wherein the bent free
edge of the outer ply is secured to the body of the ply by means of
a line of heat welds extending the length of the strip.
4. An edging strip as defined in claim 1, and wherein the fibers
forming such strip comprise linearly oriented polypropylene fibers
felted together into non-woven cloth.
5. An upholstery edge construction comprising:
an upholstery cover formed of an outer sheet of upholstery fabric,
covering a thick sheet of resilient foamed rubber-like material
backed by a sheet of cloth and having an elongated edge to be
fastened to another upholstery structural element;
an edging strip formed of a continuous, long, narrow, randomly
oriented, non-woven fibrous sheet which is characterized by being
stiffer than said cover, smooth surfaced and stretch resistant in
all of its planar directions;
said strip being bent along its lengthwise direction to form two
overlapping plys and being secured to the cover by a line of
stitches extending parallel to but spaced inwardly of said cover
elongated edge, the stitches extending through the cover fabric
sheet and cloth and compressing them tightly together along the
line of the stitches;
and the outer ply of the strip having its free edge bent into a
continuous tubular edge portion extending the length of the strip
and receiving a relatively stiff, rod-like member extending the
length thereof;
wherein the outer ply portion, adjacent its tubular edge portion,
may be secured to said structural element for securing the cover
thereto, and the double bent strip reinforces, stiffens the edge
of, and prevents puckering and wrinkling of the cover fabric.
6. A construction as defined in claim 5, and said strip being
centrally bent approximately in half along its length direction,
wherein each of said plys is formed of a double thickness, and said
tubular portion being formed by the centrally bent portion.
7. A construction as defined in claim 5, and wherein the bent free
edge of the outer ply is secured to the body of the ply by means of
a line of heat welds extending the length of the strip.
8. A construction as defined in claim 7, and wherein the fibers
forming said strip comprise linearly oriented, polypropylene fibers
felted together into non-woven cloth.
9. A construction as defined in claim 5, and the cover fabric and
the sheet being substantially free of connection to each other,
except at their edges.
Description
BACKGROUND OF INVENTION
In the manufacture of automobile type seats, it is customary to
first form the inner seat structure out of the usual metal springs,
support frames, etc., and then to cover the seat back and
horizontal seating portion with a foam rubber-like material, with
the entire structure then covered with an upholstery fabric which
is previously stitched into a cover formation out of separate
fabric panels. In some seat constructions, sheets of thick,
resilient, foam rubber-like plastic material is secured in face to
face contact with the panels of the upholstery cover fabric which
covers the forward portion of the seat back and the upper portion
and forward portion of the bench or seating part.
The upholstery fabric is usually made of either a woven fabric
material or a monolithic sheet plastic material or combination of
these, stitched together in various panel formations. All of these
materials tend to stretch and to pucker and wrinkle, particularly
along lines of stitching. Thus, in fastening the edges of cover
panels together or fastening edges of the cover panels to the under
supporting structure of the seat, such as the spring frames,
particularly where the cover material is jointly assembled with the
seats of resilient foam material, it is difficult to form straight,
unpuckered and wrinkle-free seams during the process of
manufacturing the upholstery cover and during the assembly to the
seat frame. Also, there is a tendency of the cover to wrinkle and
to pucker and at times, to actually tear along its edge joints,
after a period of use of the seat. This is particularly aggravated
since automotive seats, are exposed to varying climatic conditions
including varying temperatures, humidities, etc., which affect
fabric and seat covers.
Hence, the invention herein is concerned with providing an
upholstery edging for seat covers used in automotive type seats,
although also usable in ordinary furniture construction, for making
it easier to assemble composite panels of fabric and resilient foam
rubber-like linings, and to join the panels together to form the
overall seat cover and also to join the edges of the seat cover to
the supporting seat frame construction. Such edgings reinforce the
foam material and the joints at the edges of the cover panels, make
assembly far simpler and avoid wrinkling, puckering and tearing of
the cover fabric and its joints.
SUMMARY OF INVENTION
The invention herein contemplates forming edging strips secured to
the edges of upholstery cover panels, particularly those formed of
layers of outer upholstery fabric and inner, thick, resilient
foam-type materials, by a line of stitching which connects the
cover layers together along their edges, as well as connecting the
strip thereto, and with the strip being double bent at the line of
stitching to form an inner ply extending along the edge portion of
the cover, and an outer ply having a tubular formation formed
thereon and containing a stiffening rod-like material. Thus, the
outer ply may be pulled for stretching the cover into shape and may
be fastened to adjacent seat elements or cover panels. The two plys
back-up and reinforce the cover edge for evenly distributing loads
thereon, and resisting wrinkling, puckering and tearing thereof.
The strip is preferably formed of a thin, narrow, elongated
non-woven, randomly oriented fiber cloth made of felted, stretch or
linearly oriented, polypropylene fibers which make up a relatively
smooth and slippery surfaced cloth which is relatively stiff and is
stretch resistant in all of its planar directions.
This edging thus forms a means for spreading out and more uniformly
applying loads along the entire length of the upholstery cover edge
to which the strip is attached. Due to its stretch resistance and
relative stiffness, as compared to the upholstery cover, it
maintains the appearance of the finished seat, that is, preserving
its smooth, wrinkle-free, pucker-free seams and edges.
These and other objects and advantages of this invention will
become apparent upon reading the following description, of which
the attached drawings form a part.
DESCRIPTION OF DRAWINGS
FIG. 1 is a perspective, cross-sectional view of an automobile type
seat cover forward seat back panel and upper and forward seat
portion panels, showing the application of the upholstery edging
thereto.
FIG. 2 is an enlarged, perspective view of a fragment, taken in the
direction of arrows 2--2 of FIG. 1.
FIG. 3 is an enlarged, perspective cross-sectional view of a
fragment taken in the direction of arrows 3--3 of FIG. 1, showing
the lower edge of the forward seat back panel.
FIG. 4 is an enlarged, perspective, cross-sectional view showing
the joint between the upper seat portion cover panel and the
forward edge panel of the seat portion.
FIG. 5 is a view similar to FIG. 2, but showing the reinforcing rod
removed and showing one form of edge strip.
FIG. 6 is an enlarged, perspective view showing another form of
edge strip, with the reinforcing rod removed, and corresponding to
that shown in FIG. 3.
FIG. 7 illustrates the edge strip of FIGS. 2 and 5 connected to a
single thickness upholstery sheet.
DETAILED DESCRIPTION
FIG. 1 illustrates, in cross-section a portion of an automotive
type seat upholstery cover 10 having a forward seat back panel 11
and an upper seating portion panel 12 to which is connected a
forward edge panel 13. These panels are slipped over the previously
formed seat structure which consists of springs, frames, and under
covering sheets, all of which is conventional. The edges of the
respective panels are either connected to adjacent edges of other
panels by stitching or alternatively to the seat frame construction
as by means of wire rings or the like. The seat structure and the
connections of the cover to it are omitted since these are all
conventional.
Each of the cover panels are formed of a sheet of upholstery fabric
14, which may be of a woven material or of a monolithic plastic
sheeting or a combination of these stitched together in suitable
pattern. The upholstery fabric is laid over and covers a sheet of
foamed rubber-like material 15 such as of a suitable resilient
plastic material for cushioning purposes. Usually, the fabric is
not connected to but rather is laid over the resilient sheet, the
two being connected only at their edges or at times at suitable
portions between the edges for decorative or additional fastening
purposes.
Conventionally, the resilient sheet 15 is backed with a thin, wide
weave backing cloth 16 which may be bonded thereto.
The edging strip of this application is preferably formed of a fine
strand, linearly or stretch oriented polypropylene plastic
material, which is felted into a randomly oriented non-woven fabric
or cloth. For example, it may be of approximately 13 mills in
thickness and 3 1/2 ounces per square yard in weight. The thickness
and fiber size and degree of orientation of the fiber may vary
depending upon the strengths and stiffnesses best suited for the
particular seat construction.
The strip forming fabric is relatively smooth and slippery and also
considerably stiffer than the fabric used for the upholstery. Most
importantly, it is characterized by being stretch resistant in all
of its planar directions as contrasted with normal fabrics used in
upholstery which generally are stretchable and easily wrinkled.
The edging strip may be formed in one of two analogous ways,
depending upon the overall seat construction. Thus, FIGS. 3 and 6
illustrate one way, which corresponds to the lower edge of the rear
seat panel and the lower edge of the forward edge of the seat
portion. Here, the lower edging strip 20 (see FIG. 3) is bent along
the line 21 extending its full length, after it is secured by a
line of stitching 22 to the edge of the cover panel. The line of
stitching extends through and compresses together the outer
upholstery fabric 14, the resilient sheet 15 and the sheet backing
16, thus fastening the upholstery to the combined resilient
sheet-cloth backing 16.
Bending the strip as shown, forms two plys, namely, an inner ply
which is in face to face contact with the edge portion of the
upholstery fabric 14 and an outer ply whose free edge is bent into
a tubular shape 23 with its free edge portion secured to the body
of the strip by means of a line of heat welds 24. A rod-like stiff
cord 25 is inserted into the tubular portion 23, preferably after
the stitching so as to not interfere with the movement of the cloth
in the sewing machine. The rod may be made of a twisted paper which
is thus somewhat bendable but relatively stiff and may be in the
order of about one-eight of an inch in diameter.
FIGS. 2 and 5 illustrate the second form of edging, wherein the
edge strip 27 located at the upper edge of the panel 11, is formed
of a strip of material which is double bent along a central line 28
to form a double thickness, with the portion at the double bend
forming the tubular shape 29 and with a line of heat welds 30
completing the formation of the tubular shape.
The strip is then bent along a line 31 after it is stitched by a
line of stitches 32 which simultaneously fasten the strip to the
edge of the cover and also compress and stitch together the edge
portions of the upholstery fabric 14 and the thick resilient sheet
15 and the cloth backing 16. After the stitching process, the
rod-like material 25 may be inserted into the tubular shape.
Where adjacent sheet panels are to be joined together, as for
example shown in FIG. 4 which illustrates the joint 33 between the
seating panel 12 and forward edge panel 13, the strip 27a, formed
in the same way as shown in FIG. 2, is stitched by the same line of
stitches 37 which secures the panels together. The construction is
otherwise the same as that described above.
Similarly, where the upholstery cover consists of only a single
thickness of fabric, such as is common along the vertical edges of
a seat, the edging may be secured as illustrated in FIG. 7. Here,
the edging strip 27b, which is otherwise identical to strip 27
illustrated in FIG. 2, is secured by a line of stitches 38 to the
single thickness upholstery fabric 39.
With this construction, it can be seen that the inner ply of the
strip, whether it is of a double layer as in FIG. 2, or a single
layer as in FIG. 3, stiffens and reinforces the edge of the
upholstery cover, preventing puckering or wrinkling thereof, with
the outer layer serving as the fastening means for both fastening
the panel to another panel or to the seat structure, as well as for
distributing loads and pulling the panel. Thus, the edge strip
makes it easier to assemble the seat panels into the composite seat
cover and preserves the life of and the appearance of the seat
cover after assembly.
* * * * *