US1870584A - Comb hanger straightening method and device - Google Patents

Description

Allg. 9, 1932. D, s CS1-ROM 1,870,584

COMB HANGER STRAIGHTENING METHOD AND DEVICE Filed Nov. 7, 1929 2 Sheets-Sheet l Aug. 9, 1932. D. s. OSTROM 1,870,584

COMB HANGER STRAIGHTENING METHOD AND DEVICE Filed NOV. 7. 1929 2 Sheets-Sheet 2 and away Patented Aug. 9, 1932 UNITED .STATES PATENT OFFICE DAVID SAMUEL OSTROI,

MENTS, TO INDUSTRIAL PATENTS PORATION OF DELAWARE 0F KANSAS CITY, KANSAS, ASSIGNOR) BY MESNE ASSIGN- CORPORATION, OF CHICAGO, ILLINOIS, A COB- COMB RANGE STHAIGHllllillil'IN(.3r IETHOD AND DEVICE Application mea November 7, 1929. serial No. 405,381.

roughly handled. Large quantities thereof are often used in a. single packing house. It is necessary to provide means for straightening the bacon hangers so that they will function properly and not injure the product. This straightening operation should be performed rapidly and at low cost. It is the purpose of this invention to provide a machine suitablevfor such work.

One of the objects of this' invention is to provide a method for straightening bacon hangers. Another object of the invention is to provide means for straightening bacon hangers. Other objects will be appa-rent from the descriptions and claims which follow.

In the accompanying drawings:

Figure 1 is a plan view, partly broken away, of the improved machine.

Fig. 2 is a front elevation of the machine.

Fig. 3 shows the machine in side elevation.

Fig. 4 is a perspective view showing a. standard form of bacon hanger.

Fig. 5 is an enlarged sectional view taken transversely through the. straightening dies and a bacon hanger in place therein.

Fig. 6 is a sectional detail taken on the line 6-6 of Fig. 5.

The essential elements of this machine consist merely of a pair of dies for receiving bacon hangers, one of said dies being stationary and the other being movable toward from the stationary one. Power is imparted to the movable die by a pneumatically or hydraulically operated doubleacting piston under the control of a supply and relief valve which is preferably operated by a treadle.

Referring to the drawings, the operating mechanism is mounted upon a table top 1 which supports the stationary die 2 and the movable die 3. The die 2 is clamped to a supporting bar 26 by means of the screws 5, asin Fig. 2 and die 3 is carried by bar 4. The supporting member 4 is .carried by a piston rod 6 and is locked thereto by the nut The `piston rod 6 isguided by bearings 7 and 8 formed on the cylinder heads 9." Cmpressed air isalternately admitted and released from the opposite ends of the cylinder 10 through valve 11, the details of which are clearly indicated in Fig. 3. The conduits 12 and 13 lead from the valve to opposite `ends of the cylinder.' Supply conduit is indicated at 14. The valve is operated bythe treadle mechanism 15.

The die support 4-is guided during its reciprocating motion by pins 16 extending downwardly into the channels 17 formed in the table top 1.

The construction of the bacon hanger, as shown in Fig. 4, is merely a thin frame structure 18 provided with the supporting hook 19 and a row of teeth 20. These teeth are generally just nails welded to the back of the hanger. It is the nails thatl generally become bent; therefore, the dies 2 and 3 are formed so as to engage and force the nails into straightened condition. For this purpose, the dies 2 are provided with vertically extending more or less V-shaped pockets 21 and the opposing die 3 is provided with wedge-shaped projectors 22 for entering the pockets 21. i

The pockets 21 of the lower or supporting die are separated by transversely extending wedge-shaped portions. These upstanding wedge-shaped portions may be described as longitudinally spaced and longitudinally arranged portions that provide longitudinally spaced and longitudinally arranged pocket sections 21. The lower portions of the pocket sections are defined by a straight, horizontal and longitudinally extending supporting surface at the top side of the lower guide.

lThe upper die has transversely extending wedge-shaped projecting portions or projectors 22 providing pressing portions that eX- tend downwardly into-the pocket sections 21 vof the lower die. The lower projecting faces of the projectors 22 are located in a straight, horizontal, longitudinally and transversely extending plane and cooperate with the companionl straight, horizontal supporting surface portions provided at the bottom of pocket sections 21. The series of longitudinally spaced and longitudinally arranged pockets 21 provided by and between the series of longitudinally spaced and longitud1nallyarranged transverse wedge-shaped portions of the lower die are located atl one sideto wit, at the rear-of the longitudinally extending medial line of the lower die. Likewise, the series of longitudinally spaced and longitudinally arranged pressing portions 22 are located at one side-to wit, at the rearof the longitudinally extending medial line 0f the upper die. Each die at the other side of its medial line--to wit, at the front pressing portion of each die-is provided with a pressing surface which merges pres'singssurfacf the rear portion of the die into a longitudinally curved contour defining the front edge of the pressing' portion of each die. It will also be observed that in the process of straightening the nails or teeth of a hanger thatthef'front vertical and longitudinally/extending face of the back'of the hanger is supported by the rear vertical and longitudinally extending surfaces Aof the cooperating upper and lower dies, that the upwardly extending projecting portions of the lower-die-that provide between them pockets 21-engage the side portion of each nail so as to properly straighten and position each nail in respect to the back member of the hanger, and that the top and bottom of each nail is engaged by the horizontal and curved portions of the die to edect the rest of the desired corrective bending of the nail or tooth.

Important features of the die construction are the similarly curved surfaces 24 and 25 of the dies 2 and 3 respectively. Surface 24 is convex and surface 25 is concave. If the dies are made straight, without the curve, the back of the hanger to which the nails are fastened will be sprung out of shape in the opposite direction to the curve of these dies. That is, the back of the hanger, and consequently the nails fastened to it, will be curved back in the center toward the hook of the hanger. In order to overcome this difficulty, the dies are made with a slight medially outward curve which has been found -by experiment to be just enough to counteract the tendency of springing the back of the hanger inwardly from a straight line when the dies come together. Durin the straightening operation, the frame 18 o? the bacon hanger is held in place by the fixed retaining Z-bar 26.

In the operation of this straightening machine, the comb hangers are operated upon, one at a time, by a machine such as shown in the drawings or by a machine in which the dles are extended into a series in line. Each hanger is paed over die 2 and beneath the upper flange of retaining member 26, as indicated in Fig. 5. Near their heads or bases, the nails are engaged by the projections 22 of die A3 and forced into the recesses 21 formed by the projecting parts of die 2. The curved surfaces 24 and 25 of the dies then function t0 correct a tendency of the frame of the ba-4 con hanger to become distorted.

Although but one Specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be alj tered or omitted without departing from the spirit of this invention as defined by the following claims.

I claim:

1. Complementary dies for straightening bacon comb hangers having straight meeting faces a oaqadeafameaiaiiaagiaemnaa/M from the straight, longitudinally,extendingandfprovided with teeth receiving and strightening recesses and projections, and havingthe meeting faces at the opposite side of said medial longitudinal line, plain and longitudinally curved.

2. In a machine for straightening bacon comb hangers",complementary dies having straight meeting faces and teeth-receiving and straightening recesses and projections at one side of a medial longitudinal line, and having the meeting faces at the opposite side of said medial longitudinal line plain and longitudinally curved, a retainer for one of the dies formed with an overhanging portion to engage over the hanger and project across the joint formed between the dies when brought together, means for moving the other die towards and away from the companion die, and guide means for directing the movable die in its movements.

3. In the straightening of longitudinally spaced forwardly and transversely extending nails or teeth which are securedto a longitudinally and vertically extending back mem-` ber, the method which comprises supporting the forward face of the back member while simultaneously engaging the rear portions of the nails laterally to straighten or align the nails in one direction, and pressing rear portions of the nails between upper and lower, longitudinally and transversely extending straight surface portions and subjecting the forward portion of the nails between upper and lower pressing surfaces which merge from the straight surface into a longitudinally curved contour at the outer edge of the pressing surface.

Signed at Kansas City, Kansas, this twenty-eighth day of October, 1929.

DAVID SAMUEL OSTROM.

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