US2663882A - Edge roll for spring cushion assemblies - Google Patents

Description

Dec. 29, 1953 w. F. RICHARDSON EDGE ROLL FOR SPRING CUSHION ASSEMBLIS Filed Feb. 20, 1952 m. w m w.

BY ma* A 72b/wey):

Patented Dec. 29, 1953Y EDGE ROLL FOR SPRING CUSHION ASSEMBLIES William F. Richardson, Carthage,

to Flex-O-Lators, Inc., Carthage, poration of Missouri Mo., assigner Mo., a cor- Application February 20, 1952, Serial No. 272,532 5 Claims. (Cl. 5-360) This invention relates to new and useful improvements in spring cushion assemblies, and

.relates particularly to a padded edge roll for use in connection with said spring cushion assem blies. In many types of spring cushion assemblies, a padded edge roll ,is often applied to the bare spring assembly arc 1nd the marginal edges thereof. The usual upholstery and covering is then applied over the springs and edge roll. The edge roll protects the overlying upholstery against Wearing contact with the wires of the spring assembly at the edges of the cushion, this area normally being subject to the greatest wear. The edge roll also provides greater comfort for the user of the cushion, and better protection for the springs. The provision of an improved edge roll of this class is the principal object of this invention.

Another important object is the provision of an edge roll of the class described which has the initial form of a flattened, elongated strip adapted to be folded along its longitudinal midline and fitted about the marginal edge of a spring assembly with the edge portions thereof disposed respectively on opposite sides of the end loops of the component springs, and having novel means for securing said edge portions together through said spring loops, wherebyvto fasten said edge roll firmly in position on said spring assembly.

A further object is the provision of an edge roll as described wherein the means for securing the edge portions of the roll together comprises a plurality of resilient heads or detents carried by one edge portion of the roll and adapted to be snapped through holes formed in the opposite edge portion of the roll, whereupon they expand to prevent withdrawal.

A still further object is the provision of an edge roll of the class described wherein the resilient heads or detents are formed in a continuous strand of wire extending longitudinally of the edge roll, said wire also serving the functions of strengthening and stilening the edge roll, and of holding the component parts thereof in assembly.

Other objects are extreme economy and simplicity of construction, ease and convenience of application requiring no tools or special equipment, and adaptability for use in many types of spring cushions.

With these objects in view, as well as other objects which will appear in the course of the specification, reference will be had to the drawing, wherein;

`to coils II) and I2 Fig. 1 is a fragmentary plan View of a spring cushion assembly showing an edge roll embodying the present invention applied thereto, with parts .broken away.

Fig. 2 is an enlarged fragmentary section taken on line II-II of Fig. 1.

Fig. 3 is an inner face view of a section of the edge roll separated from the spring assembly and laid flat, with parts broken away.

Fig. 4 is a section taken on line IV-IV of Fig. 3.

Fig. 5 is a section taken on line V-V of Fig. 3.

Like reference numerals apply to similar parts throughout the several views, and the numeral 2 applies to a spring assembly such as is commonly used in spring cushions, and comprising a plurality of spool-shaped helical springs 4 arranged in parallel, spaced apart rows with their axes substantially parallel. Each of said springs has a substantially circular top loop ii and bottom loop 8, said top and bottom loops lying respectively in planes forming the upper and lower faces of the assembly. The top loops 6 of adjacent springs in each row of springs overlap I slightly, and are joined by a plurality of helical binder coils I0 which extend across the upper face of the assembly transversely to the rows of springs, and each which extends between corresponding pairs of springs in each row, ceiling about the overlapping portions of loops 6. Binder coils I2 similarly join the bottom loops S of the springs, as indicated in Fig. 2. The binder coils may be secured by wrapping the end portions thereof about a convenient loop of springs 4, as indicated at I4. A binder coil I6 similar may be disposed about the marginal edge of each face of the spring assembly, coiling about the outer edge portions of the end loops 6 and 8 of springs 4, as shown, and a straight wire I8 may be threaded if desired through each of said marginal coils, in order to hold the assembly more firmly in shape. It is to be understood however, that the specific arrangement of springs 4 shown, and the means for joining them together Vto form a cushion assembly, are not intended in any way to be restrictive, nor to preclude other arrangements or joining means, since the edge roll forming the subject matter of this invention may be applied to many different types of spring assemblies.

The edge roll 20 comprises a tubular sheath 22 which may be formed of any suitable pliable sheet material, but is preferably made of a tough, heavy paper. A heavy grade of paper known as X-crepe paper has been found particularly sheath 22 is a suitable padding material,

as shown comprises a plurality of superimposed' strips 26 of a thick, soft pulp paper, andwhi'clt further may be regularly indentedxtmorm what? is ordinarily known as waie paper. This indentation provides a greater degree of. yieldf A ability. It is apparent, however, that various other types of padding material could bem'acle'.

Referring principally to. Figs. 3, 4, and 5, it will ba seen. that. aplurality' of.y holes 28 are formed through. the sheath: and padding; material.; adjar cent. one. edge of` the sheath, saidholes being: regularly spaced apart longitudinally of the sheath. It will be' noted also that. said holes pierce the overlapping edge. portions 24` ofthe.. strirsforming sheathzZZi. Asimilar'series oi holes Niameformedlfthrough the sheath. andpadd'mg adjacent the.opposite edge of. the. sheath;I Holes, 28 and 3'0larealigned.- transversely ost the sheath, so as to be brought into registering relation when the, sheath is folded longitudinally. along its. midline; asshown in. Figi: 2. A resilient WireV 32 extend'silongitudinally of theedge.rolltlyingI against theouter'fface. of sheath 22*a and? intersecting holes. 18a Ateachf hole. Z8; a loopv or.` bightis formed in the Wire.` to presenta resilienthead or detent 34 which projects. inwardly through. hole 281 and extends outwardly.: from the inner face of thev` sheathi As-detailed in' Fig; 5,. each head 34 in-n clud'esr a of parallelf reaches v516i extending at' rightangles, to the bodly-1 of wire 3-2, having" a length equal to substantially twice the-thickness ortho padded sheath, andbeing norm-ally spaced aparta distance equal to the' ldiameter of hole 28;L so as to fty snugly therein. At thef ihnererids' ot reaches 3S", the Wire is rebentoppositely outfwardly longitudinal-ly of the sheath tof formshoulders 38 confronting` the inner facef ofthe sheath. From the outer1` endof said shoulders; thewirelfi's rebentA long-itudinallyor' the head, andT extends'in converging reachesY lli toa. rounded' point 141.

applying theedge roll', sheath vHis folded longitudinally' along its midline asA shown, and disposed` about the border ofthe top face off' spring assembly 2; with the edge'porti'ons thereof disposed respectively above and below the top'l loopsA Scot-"springs 4'. Each of heads 34K is then pushed through hole in the opposite edge por-v tion'off'the sheath. Point 6,'2y of the head1 facili tates the-'insertion thereof-into hole'3`0". As it isk pushedE through hole= 30, the head Misdeformedi resifli'enily, shoulders 38 being-moved into' over'- lapping` relation, to permit its; passage through the-hole; When shoulders 3'-8-`ha-ve passedientirely through hole 3 9, they' expand resili'ently to engage-the outer surface-'of the sheath', therebyI preventing withdrawal of the head.- Heads are of course disposed to extend into the interior of the spring assembl,7 las shown* in Figi 2, so as not to interferirwith4 the upholstery which is `later appliedE over lthe outer1 surfaceof the' assembly; Also anv edge `roll may if desired be applied: to the bottom loops-8 `ofV- springsy 4, as shown' yin 4 Fig. 2. The edge roll is thus secured iirmly to the spring assembly, since heads 34 connect the edges of the sheath through spring loops E and 8, and on the inner side of marginal coil I6 and straight marginal wire I8. While the drawing shows the edge roll folded about the marginal binden coils l'i, it;I is apparent; thaty it. could be folded about aco'mmorr straight marginaf Wire as more commonly used in cushion spring assemblies, or that if desired it could be used as a substitute. ion and. in lieu of any marginal wire. Y 'Ihus it* is apparent that an edge roll possessing several advantages has been produced. It is extremely'siiiiple and economical in construction. 'It mayfb'e appl-red by hand Without tools or other special equipmenti- It may be applied to virtually type of cushion spring assembly without change or special adaptation of any kind. The hea-ds Slsince they pierce the entire sheath and pass through the overlapping portions of the paperstrip formingr thefsheath..serveadditionally to holduallfpartsot; the edge rollin assembly, both'.r beiore. and after application to:- the: spring, asserxibly;A The. formation yof heads; 3,4: im ai wire: extending longitudinally ofthe: edge roll` has: at; least; two importantV advantages., Eirstly; a corrti-nuous: wire; attached at spaced points# to the: sheatlisproyides tensile strength andY any desired. degree. of stiffness in. the; edge roll.- tlculaizlyi valuableffin instances; wherein, the edge; roll, as described above.. serves lieu ot: other. marginal binderv or Wire. Secondlygtha wire cormection. between successive; heads; hol'dsi the headsl in their expanded or' operative; posi-'r tion, preventing accidental: Withdrawal .thereof from holes.4 3d. It: will be: noted: that?asxeaclfi head. isy compressed toi enter the; correspondin'g hole 30 during the application of thev e'dge'.- roll.. said compression willnecessarilyl causef' asli'ght localized buckling or deformation of the'sheath. between that heady andi the next adjacent headi, since compressing theVv head eiiectivelyshortens the length oi the Wire. However, auchA locali deformation Wilt noto/cour during the applic ationA off a general load toi the cushion such as en*vr countered-in general use, andfurthermore;v any: such ordinary: deformation of? the cushion places'I the W-ire'irr tension, which further'tendsto-lhold' the heads: 34 in their expanded'operativeiormi:

While I have shown a specific embodiment ofv myv invention, it is apparent-that many minor changes of material, construction, andope'rationcould bemade without departing-Strom theispirit' ofthe' invention asI de'ned by 'the scope' ofthe" appended claims.

l. An edge 'rolll fonspring'mattress assemblies" comprising anx elongated flattened pliable padded member adapted tobefold'edZ longitudinally `Ialongi its midline, sa-id padded member having a series of longitudinally spacedapart holes#l formed therethrough adjacent onelongitudinal edge thereof; andi a' resilient wire: extend-ihgdlongiL tudi'nally ofsaiipa'dded member' adjacent the opposite longitudinal edge thereof saidWire-bein'g'i secured to saidifpadded?member'at-longitudinally spaced apartpoints` and being `formed to present. a series of' longitudinally spaced?l transversely compressibl'e heads each in transverse alignmentv with one of said holes and adapted toi be snappedA throughvsaid hole when said padded"member`v is folded;

2.l An edge roll? for spring mattress assemblies comprising an elongated nattened pliabl'efpadded t right angles to form its midline, said padded member having likev series of longitudinally spaced apart holes formed therethrough respectively adjacent the opposite edges thereof, and a resilient wire extending longitudinally of said padded member and having bights formed at intervals therein to present transversely extending heads extending through the holes of one of said series of holes, said heads being normally too large to pass through the holes of the other series but being resiliently compressible to pass therethrough.

3. The structure as in claim 2 wherein the bights formed in said wire lie in a plane coinciding with the body of said wire, and wherein each bight forms a substantially triangular head with its apex extending outwardly from the wire body, the wire reaches forming said apex being rebent inwardly to form shoulders substantially parallel to the Wire body, and rebent again at parallel reaches joining said head to said wire body.

4. The structure as in claim 2 wherein the bights formed in said wire lie in a plane coinciding with the body of said wire, and wherein each bight forms a substantially triangular head with its apex extending outwardly from the wire body, the wire reaches forming said apex being rebent inwardly to form shoulders substantially parallel to the wire body, and rebent again at right angles to form parallel reaches joining 30 said head to said wire body, said last named 6 parallel reaches being normally spaced apart a distance substantially equal to the diameters of the holes in said sheath. Y,

5. An edge roll for spring mattress assemblies comprising a strip of pliable sheet material folded longitudinally to form a at tubular sheath with.

the edge portions of said strip overlapping at one edge of said sheath, padding material disposed in said sheath, said padded sheath having a series of longitudinally spaced holes formed there- Vthrough adjacent one edge thereof and piercing the overlapping portions of said strip, and a like series of holes formed therethrough adjacent the opposite edge thereof, and a resilient wire extending longitudinally of said sheath in intersecting relation with said rst series of holes, said wire having bights formed therein at intervals to present loops each extending through one of the holes of said rst series, the extended portion of each loop being formed to present an enlarged head normally too large to pass through said hole, but being resiliently compressible to pass through the corresponding hole of said second series when said sheath is folded longitudinally along its midline.

WILLIAM F. RICHARDSON.

References Cited in the le 0f this patent UNITED STATES PATENTS Number

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