US 3634925 A
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.
Claims available in
Description (OCR text may contain errors)
0 United States Patent 1151 3,634,925 Van Loo 5] Jan. 18, 1972  METHOD OF ASSEMBLYING PADDED 2,279,865 4/1942 Ellinwood ..29/150 ux ARMREST 2,567,565 9/1951 Keeler et al.. ..29/509 UX 2,633,186 3/1953 Jeckell ..297/227  Invent Grand 3,393,933 7/1968 Cornelius ..248/346.1 x  Assignee: American Seating Company, Grand Rapids, Mich FOREIGN PATENTS OR APPLICATIONS 22 Filed: Dec. 5 1969 955,322 4/1964 Great Britain i l 2 l PP 882,592 Primary ExaminerCharlie T. Moon AttorneyDawson, Tilton, Fallon & Lungmus  [1.8. CI ..29/458, 29/509, 29/515,
248/345.l, 297/227, 297 411 1 1 ABSTRACT ll- Cl- A resilient padded am rest is formed on a chair arm m|d Field 0f Search ..29/509, J15, 458, 150, g a bendable shape retaining metal channel in the lower p 297/411 248/3451 346'l tion of a resilient plastic body with an integral plastic coating 56 R f Ced over the bottom of the channel and the side portions of the l e erences 1 channel, the channel being placed over the arm and the side UNITED STATES PATENTS portions being bent inwardly to compress the plastic against the arm top and plastic on the side portions against the arm 1 l l Pedroll bottom for anchoring the cushion pad in place 1,901,377 3/1933 Roe ....248/346.l 2,070,424 2/1937 Duncan ..29/509 UX 2 Claims, 7 Drawing Figures I II l/lag PATENTEDJMH 8 1372 Viitftffl! I I I I /r I I I p AZZZZZQYXZZZ I. "VENTOR Wilhom R. Van Loo BY fizllbw ATTORNEYS 1 METHOD OF ASSEMBLYING PADDED ARMREST 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. I 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, designates a stadium chair having metal standards 11 with arms 12 to which are attached padded arm rests l3.
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 II 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 I9 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 I9 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, ee-
ment, 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.
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.