US1045591A - Tack-strip. - Google Patents

Description

J. MUTH.

TACK STRIP.

APPLICATION FILED SBPT.28,1911.

1,045,591, Patented Nov. 26, 1912.

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IINIT TT JOHN MUTH, OF NORWALK, CONNECTICUT. ASSIGNOR TO THE E. H. I-IOTCHKISS COMPANY, OF NORWALK, CONNECTICUT, A CORPORATION OF CONNECTICUT.

TACK-STRIP.

Specification of Letters Patent.

Patented Nov. 26, 1912.

App1ication filed September 28, 1911. Serial No. 651,749.

T 0 all whom it may concern:

Be it known that I, JOHN Morn, a citizen of the United States, residing at Norwalk, county of Fairfield, State of Connecticut, have invented an Improvement in Tack- Strips, of which the following is a specification.

This invention has for its object to provide a tack strip adapted for use in the class of driving machines in which each actuation of a plunger severs a tack from a strip, drives the tack and feeds the strip forward, leaving the next tack in position to be out off and driven, and the invention consists in a strip comprising a series of tacks having angular heads placed in staggered relation, that is on each side of a median line alternately, the strip being continuous at the center only and port-ions only of the heads of contiguous tacks being joined so that while the tacks are connected together securely enough to permit the strips to be handled freely in use, but little metal is re quired to be cut in severing a tack from the strip.

A further object of the invention is to provide a tack strip in which the tacks shall lie in two independent rows or lines, thus enabling me to use in the driving machine a central rib over which the strip rides with lines of tacks on opposite sides of the rib, which is an important advantage as it enables the strip to be held more securely and practically eliminates danger of slipping or failure, from any cause, of the feeding move ment.

With these and other objects in view I have devised the novel tack strip which I will now describe, referring to the accompanying drawing forming a part of this specification and using reference characters to indicate the several parts:

Figure 1 is a plan view of one form of my novel tack strip; Fig. 2 a side elevation and Fig. 3 an endview corresponding therewith; Figs. 4c, 5 and 6 are respectively a plan view, side elevation and end view of a slightly variant form of the invention; and Figs. 7 8 and 9 are respectively a plan view, side elevation and end view of another variant form of the invention.

10 denotes the heads, 11 tacks and 12 a continuous connecting strip by which the inner ends only of the contiguous sides of the heads of tacks are joined. The heads and tacks are formed mechanically by the operation of punches and dies leaving the central connecting strip. The upper surface of the strip is flat and smooth, the heads are of uniform shape and size and the tacks are approximately centrally disposed on the heads.

The invention is not limited to any special configuration of the tacks or thickness of the heads.

In the form illustrated in Figs. 1, 2 and 3, the head comprises but a single thickness of metal and the upper end of the tack is formed from the metal of the head, parallel cuts being made inward from one side and extending nearly to the center, the separated portion which forms the upper end of the tack being bent at a right angle to the head, as will be readily understood from Fig. 1 in connection with Figs. 2 and 3.

In the form illustrated in Figs. 4, 5 and 6, a wider strip of metal is used. The full length of the tacks is left projecting from one edge of the head and the metal is folded upon itself as at 13 in Fig. 6, the fold being wide enough to carry the tack to the center of the head, the tack being bent at right angles to the head as before. In this form, approximately one-half of the head consists of a single thickness of metal, and the other half, which comprises the portion to which the tack is attached, consists of two thicknesses of metal.

In the form illustrated in Figs. 7, 8 and 9, the full head of each tack comprises a double thickness of metal. In the forms illustrated in Figs. 1 to 3 and 4 to 6, inclusive, the metal removed from between the heads, as at 14, is waste. In the form illustrated in Figs. 7 to 9, inclusive, this metal from between a pair of heads on one side of central strip 12 is folded backward upon itself and forms a portion of the head of the intermediate tack on the opposite side of the central strip, as indicated by 15 in Fig. 9.

It will be noted that the difference between the heads in the second and third forms consists solely in this fold 15, the effect of which is to make the head in the third form a double thickness of metal throughout. The metal cut away at the spaces 14 between the heads, whether it is entirely removed and becomes waste or is folded backward upon itself to form a portion of the head of the intermediate tack on the opposite side of the central strip, reduces the quantity of metal that must be severed at each actuation of the plunger of a machine to the minimum but leaves quite suflicient metal to permit the strips to be packed and handled in use without danger of breaking them.

From the foregoing it will be clear that in all forms of the invention, the arrangement of the tacks, or shanks, 13 is such that a continuous groove is provided in the strip for the supporting rib of the feeding mechanism by means of which the strip can be readily fed to position to be acted on by the cutter, While at the same time lateral or other displacement of the strip is prevented.

Having thus described my invention I claim:

1. A tack strip formed of a single sheet of material and comprising heads in staggered relation, the inner ends of the contiguous sides of said heads being joined and forming a continuous centrally disposed longitudinal body, each of said heads being provided with a shank, said shanks forming a continuous longitudinal groove.

2. A tack strip formed of a single sheet of material and comprising heads in stag; gered relation, each head having a centrally disposed shank, the inner ends of the contiguous sides of said heads being joined and forming a continuous centrally disposed longitudinal body, each of said heads being provided With a centrally disposed shank, said shanks forming a continuous longitudinal groove.

3. A tack strip comprising heads in staggered relation with spaces between them, the inner ends of contiguous sides being joined, each head having a shank formed integral therewith and projecting at right angles thereto and the metal removed from the spaces being bent backward upon itself and forming a head of double thickness.

In testimony whereof I affix my signature in presence of tWo Witnesses.

JOHN MUTH.

Witnesses:

l/VM. A. CURTIS, F. E. WILoox.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.

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