US2862272A - Center ledge scoop with means resisting forcible mis-meshing - Google Patents

Description

Dec. 2, 1958 H. MORlN 2,362,272

' CENTER LEDGE SCOOP WITH MEANS RESISTING FORCIBLE MIS-MESHING Filed July 8, 1955 INVENTOR. LOUIS H. MORIN 1 ATTORNEY United States Patent G CENTER LE'DGE SCOOP WITH'MEANS RESISTING FORGIBLE' MIS MESI-IIN G Louis H. Morin, Bronx, N. Y. Application July 8, 1955, Serial No. 520,780 2 Claims. (Cl. 24-20543 This invention relates to the production of separable fastener stringers employing scoops mounted on beaded edge portions of the stringer tapes. More particularly, the invention deals with fasteners of the character described, wherein the scoops are of the center ledge type. Still more particularly, the invention deals with a scoop structure, wherein one side or plane only of the scoop includes means for coupling the scoops against lateral separation and the other, or back plane, is fashioned to form a substantially more or less rectangular member for resisting twisting or other forcible mismeshing of the scoops while, at the same time, simplifying production of scoops of the kind under consideration. This application is a continuation-in-part of application Serial No. 307,279, filed August 30, 1952 which issued on July 9, 1957 as Patent N0. 2,798,274.

The novel features of the invention will be best understood from the following description, when taken together with the accompanying drawing, in which certain embodiments of the invention are disclosed and, in which, the separate parts are designated by suitable reference characters in each of the views and, in which:

Fig. 1 is an enlarged plan view of a small portion of a pair of separable fastener stringers coupled together with my improved scoops.

Fig. 2 is a section on the broken line 22 of Fig. 1; and

Fig. 3 is a perspective view of one of the scoops detached.

In Figs. 1 and 2 of the drawing, I have shown at and 11 a pair of stringers, on the beaded edges 10, 11' of which are secured scoops 12, 12. As the scoops 12, 12' are both of the same construction, the brief description of one will apply to the other.

Each scoop is of the center ledge type and has an upper coupling part 13 and a back part 14, substantially rectangular in form and producing the member for resisting forcible mismeshing of the scoops. Each part 13, 14 includes a mounting end portion 15, 16, respectively, engaging the beaded edge of the tape, as clearly noted in Figs. 1 and 2 of the drawing.

The upper coupling part 13 forms the coupling end portion of the scoop and has a more or less diamondshaped coupling head 17, the walls of which are bevelled upwardly, as diagrammatically shown. head 17 is a coupling neck or recessed female coupling portion 18 for reception of the heads 17 of the scoops of the companion stringer, in the manner clearly noted in Fig. 1 of the drawing.

The back part or member 14, including the mounting end portion 16 thereof, is of one common width with the mounting end portion of the upper part 13, thus substantially triangular ledges 19 are provided in alignment with the necks 18, so as to receive the opposed protruding corner portions 20 of the heads 17 of the scoops of a companion stringer, as noted in Fig. 1 of the drawing.

The lower surface 21 of the upper coupling part 13 is Inwardly of the slightly tapered in an upward and outward direction, so as to insure free coupling engagement of the scoops one with the other in coupling the stringers 10 and 11 together. The lower surface 21 has, centrally thereof, a protruding rounded bead 22, which serves to reinforce the head 17, this fibead further facilitating flow of the heated material to the cavity in forming the scoop and, particularly, the back part 14 thereof.

It will be apparent that the scoops 12 are die. cast or moulded and, from this standpoint the casting or moulding operation is materially simplified in providing the rectangular back part or member 14. This simplification is also due to simplifying the die construction for producing the resulting scoop.

It will appear from a consideration of the drawing that the upper surface 23 of the top part 13 is substantially parallel to the lower surface 24 of the back part 14. It will also be noted that the outer surface 25 of the back part is substantially at right angles to the surface 24. The surfaces 25 of the scoops are in close proximity to each other when the scoops are coupled together and, for purposes of description, I have applied the reference character 25 to the surface 25 of the scoop 12', as shown in Fig. 2. It will thus be apparent that, in attempting to twist, sharply bend or otherwise deform the stringers in an effort to forcibly mismesh or separate the scoops, the surfaces 25, 25' will be brought into abutting engagement with each other; thus checking this stress or strain. It will also be understood that, in sharply bending coupled stringers transversely across the stringers, surfaces of the parts 14, adjacent each other on each stringer, will be brought into abutting engagement, checking this stress or strain.

With scoop structures of the kind defined, it will be apparent that the coupling engagement between scoops of a pair of stringers is established solely through the upper part 13 of the scoops 12, 12'; whereas, the bottom part employing the rectangular parts 14 establish no coupling engagement whatever between the scoops but simply function as blocking or checking members, which abut one another in preventing separation of the stringers when subjected to different stresses, bendings or strains. The adjacent surfaces 25, 25 are so arranged that this surface of one scoop engages corresponding surfaces of two adjacent scoops of a companion stringer. This will be apparent from a consideration of Fig. l of the drawing.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is:

l. A scoop for separable fastener stringers of the class described, having upper and back parts, each including mounting end portions arranged upon the beaded edge of a stringer tape in securing the scoop to said tape, the upper part having a coupling end portion extending beyond the edge of the tape bead and comprising male and female coupling portions facilitating coupling engagement of scoops of companion stringers in retaining the stringers against pull-apart separation, the back part having an outwardly projecting member, including ledge sides overlying the female coupling portion of the upper part to engage the heads of scoops of a companion stringer in further retaining the scoops against separation, said member of each scoop having a wide perpendicularly straight outer surface, the coupling end portion of the scoop of one stringer overlying the complemental ledge surfaces of a pair of scoops of a companion stringer, when said stringers are coupled together, to provide means, on coupled scoops, to resist forcible mismeshing, and the lower surface of the coupling end portion of the upper part being bevelled upwardly and outwardly.

2. A scoop for separable fastener stringers of the class described, having upper and back parts, each including mounting end portions arranged upon the beaded edge of a stringer tape in securing the scoop to said tape, the upper part having a coupling end portion extending beyond the edge of the tape bead and comprising male and female coupling portions facilitating coupling engagement of scoops of companion stringers in retaining the stringers against pull-apart separation, the back part having an outwardly projecting member, including ledge sides overlying the female coupling portion of the upper part to engage the heads of scoops of a companion stringer in further retaining the scoops against separation, said member of each scoop having a wide perpendicularly straight outer surface, the coupling end portion of the scoop of one stringer overlying the complemental ledge surfaces of a pair of scoops of a companion stringer, when said stringers are coupled together, to provide means, on coupled scoops, to resist forcible mismeshing, the lower 4 surface of the coupling end portion of the upper part being bevelled upwardly and outwardly, and having a centrally longitudinally extending bead.

References Cited in the file of this patent UNITED STATES PATENTS 2,331,618 Morin Oct. 12, 1943 2,355,996 Morin Aug. 15, 1944 2,394,211 Stilf Feb. 5, 1946 2,526,600 Bolten Oct. 17, 1950 2,660,774 Heimann Dec. 1, 1953 FOREIGN PATENTS 561,414 Germany Oct. 14, 1932 926,777 France Oct. 10, 1947

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