U.S. patent number 3,634,925 [Application Number 04/882,592] was granted by the patent office on 1972-01-18 for method of assemblying padded armrest.
This patent grant is currently assigned to American Seating Company. Invention is credited to William R. Van Loo.
United States Patent |
3,634,925 |
Van Loo |
January 18, 1972 |
METHOD OF ASSEMBLYING PADDED ARMREST
Abstract
A resilient padded arm rest is formed on a chair arm by molding
a bendable shape-retaining metal channel in the lower portion of a
resilient plastic body with an integral plastic coating over the
bottom of the channel and the side portions of the channel, the
channel being placed over the arm and the side portions being bent
inwardly to compress the plastic against the arm top and plastic on
the side portions against the arm bottom for anchoring the cushion
pad in place.
Inventors: |
Van Loo; William R. (Grand
Rapids, MI) |
Assignee: |
American Seating Company (Grand
Rapids, MI)
|
Family
ID: |
25380930 |
Appl.
No.: |
04/882,592 |
Filed: |
December 5, 1969 |
Current U.S.
Class: |
29/458; 29/509;
29/515; 248/345.1; 297/227; 297/411.46 |
Current CPC
Class: |
A47C
7/54 (20130101); Y10T 29/49885 (20150115); Y10T
29/49915 (20150115); Y10T 29/49925 (20150115) |
Current International
Class: |
A47C
7/54 (20060101); B23p 003/00 (); B23p 025/00 () |
Field of
Search: |
;29/509,460,515,458,150
;297/411,227 ;248/345.1,346.1 |
References Cited
[Referenced By]
U.S. Patent Documents
Foreign Patent Documents
Primary Examiner: Moon; Charlie T.
Claims
I claim:
1. In a process for cushioning a structural arm, the steps of
molding a resilient plastic cushion body with a metal channel
embedded in the lower portion of the body providing an integral
plastic coating over the bottom of the channel and over the
depending spaced side portions of the channel, placing the plastic
coated channel over said arm, and clinching channel side portions
inwardly in spaced-apart relation below said arm to compress the
plastic against said arm top and the plastic on said side portions
against the arm bottom, said metal channel sides being deformable
to maintain their set, with the edges of the encased sides below
the edges of the arm, after clinching to hold the compression of
said plastic against said arm but without compressing the cushion
body above said channel.
2. The process of claim 1 in which said plastic is polyurethane
having an outer surface skin.
Description
BACKGROUND AND SUMMARY
The normal metal arm of a chair or the like requires a cushion or
padded arm rest and a problem is presented in securing an arm rest
thereto so as to retain the resilient cushioning effect of the arm
rest. Attachment of the pad by screws, rivets, bands, cement, and
other means is unsatisfactory for many reasons, and if a special
configuration is required for the metal arm in order to retain the
arm rest, this involves expense, and difficulty is presented later
in providing a replacement rest.
I have discovered that it is possible to provide a pad which will
have an uncompressed resilient top cushion while at the same time
being quickly and inexpensively anchored to a chair arm which need
have no special surface, lugs, or other attachment means. By
molding or otherwise embedding in the bottom of the resilient
plastic body a metal channel which is malleable and may be bent to
provide a set so that the plastic enclosing the channel and the
sides will be locked against the top and bottom surfaces of the
arm, a firm anchor is provided while at the same time providing an
uncompressed top cushion portion.
DRAWING
In the accompanying drawing,
FIG. 1 is a three-quarter front perspective view of a typical metal
stadium chair shown with plastic seat and back panels and with
padded arm rests attached to the metal arms;
FIG. 2, a perspective view of the arm rest prior to its attachment
to the metal arm;
FIG. 3, a fragmentary perspective view of the upper portion of a
metal standard showing the padded arm rest attached to the metal
arm;
FIG. 4, a vertical sectional view of the arm rest, the section
being taken as indicated at line 4--4 of FIG. 2;
FIG. 5, a vertical sectional view, the section being taken as
indicated at line 5--5 of FIG. 3;
FIG. 6, a top plan view of the arm rest shown in FIG. 2; and
FIG. 7, a side view of the arm rest shown in FIG. 2.
DETAILED DESCRIPTION
In the illustration given, 10 designates a stadium chair having
metal standards 11 with arms 12 to which are attached padded arm
rests 13.
The padded arm rests 13 may be formed in any suitable manner so as
to provide a resilient plastic body in which a channel 14 is
embedded in the lower portion of the plastic body. I prefer to
place the metal channel 11 in a mold and fill the mold with plastic
foam 15, such as polyurethane, vinyl, or other suitable material
similar to sponge rubber. The polyurethane foam forms a hardened
outer surface or skin 16 which thus provides a finished surface and
need not be covered by an upholstering material. Similarly, other
plastic materials, such as vinyl, sponge rubber, and composition
materials, may be formed to produce the resilient cushion body
above the channel and a skin thereover.
The padded arm rest 13 may be attached to the metal arm 12 of the
standard 11 by placing it over the upper surface 17 of the arm 12
and bending the two side portions 18 and 19 around the outer edges
20 of the metal arm 12 until they fit snugly against the bottom
side 21 of the arm, as at 22 and 23 shown best in FIG. 5. By
drawing the side portions 18 and 19 inwardly in the clinching
operation, the resilient integral coating of plastic on the bottom
side of the channel is compressed against the top surface of the
arm 12 while the plastic on the inner side of the channel sides 18
and 19 is compressed against bottom portions of the arm 12.
The undersurfaces 24 of the foam skin, as shown best in FIGS. 4 and
5, are pressed tightly against the outer surfaces of the arm at 17,
20 and 21, thus providing a grip or hold which prevents the arm
rest from being pulled off of the arm. The process steps described
make the use of screws, rivets, cement, bands, or other fastening
devices unnecessary.
While in the foregoing specification I have set out specific
structures and steps in considerable detail for the purpose of
illustrating embodiments of the invention, it will be understood
that such details may be varied widely by those skilled in the art
without departing from the spirit of my invention.
* * * * *