US2536333A - Perforating and marking machine - Google Patents

Description

Jan. 2, 1951 s. WAXELBAUM PERFORATING AND MARKING MACHINE Filed March 30, 1948 2 Sheets-Sheet l m I [2 E 2 llml a INVENTOR SIDNEY WAXELBAUM,

ATTO RNEY Jan. 2, 1951 s, WAXELBAUM 2,536,333

PERFORATING AND MARKING MACHINE Filed March 30, 1948 '2 Sheets-Sheet 2 ATTO R N EY Patented Jan. 2, 1951 UNITED STATES PATENT OFFICE 2 Claims.

This invention relatzs to cloth-piercing or marking machines in which a fast rotating piercing tool in the form of a long drill or needle is fed downwardly through a stack of cloth or fabric. The piercing tool having been withdrawn from the stack leaves a hole in the cloth small enough to be harmless to the cloth yet large enough to remain visible as a mark for further operations such as the placing of a button or the like at the point of the mark; That is to say, a stack of cloth is thus marked by a stroke of the piercing tool whereupon each marked piece of the stack may then be subjected to individual operations in which the mark serves as a guide or expedient.

A marking machine or unit of the type herein contemplated comprises a hollow main post or standard rising from a base upon which post is vertically slidable although secured against rotation a bracket upon which a power-driven piercing tool is mounted. The piercing tool is directly coupled with a motor which has a vertically disposed rotary armature axis and is unitary with the bracket. Upon the base are provided guide means encircling the lower free end of the piercing tool when the tool is in its topmost position.

A spring provided within the post normally holds the bracket in its upper limit position upon the post and balances the weight of the bracket and its accessories. This unit is placed atop a stack of the material or cloth at a predetermined marking point, and. the bracket is moved downwardly against the pressure of its supporting spring as the piercing tool is rotating and penetrating the stack of material. The bracket is then allowed to rise upon the post withdrawing the piercing tool from the stack whereupon the unit may be shifted to another predetermined point upon the stack to effect another piercing thereof.

Since the piercing tool or needle must be relatively thin it is necessarily limited as to its free length because of the vertical buckling forces acting upon it and. tending to deflect it from its straight vertical path. Accordingly this limits the height of the stack that can be penetrated by a stroke of the tool.

If excessively long the piercing tool may veer off its straight vertical line of progress thus increasingly displacing the marking point in the consecutive pieces of cloth as it proceeds through the stack of material. In this way the needle or tool may be subject to excessive bending or buckling forces.

However, the permissible length of the piercing tool must be considered also in relation to its high speed of rotation and the dynamic transverse forces set up thereby. That is to say, if an excessive length of the tool even though guided at its lower end be subjected to high speed rotation, it may develop deflections of its intermediate portion due to centrifugal forces which together with the inherent vibratory characteris tics of the tool and with the vertical buckling forces may lead to the shattering of the tool. Hence, the use of long thin piercing tools, although desirable, involves the risk of breakage with the attendant danger from shattered flying fragments to the operator.

Indeed, the longer and thinner the piercing tool, the more its vibratory characteristics will approach a critical point relative to its speed of rotation, where the danger of breakage may become greatly enhanced. Therefore, piercing tools of a diameter on the order of .030 to .050 inch yet of a desirable practical length have not been used because of the aforementioned risk to the operator. In other words, whereas a maximum length of the piercing tool is desirable as a matter of saving time and labor by making possible the handling of stacks of material of maximum height, the choice of the length of the tool has been limited by the foregoing factors.

This problem is well illustrated by the fact that with the advent and development of modern synthetic fabrics such as nylon, viscose rayon, inyl, polyethylene, a piercing tool is desired that produces the smallest possible hole that still meets practical marking requirements, for the reason that piercing tools of larger diameter either burn or fuse or weld layers of fabric together at their high speed of rotation. Marking machines heretofore available have been ill-suited for this purpose because of their inability to produce a small enough hole at the necessary high rotary speeds for a long enough stroke of the piercing tool.

It is among the objects of this invention to make possible the use of piercing tools of a comparatively very small diameter although of relatively great length-in other words, to make possible a high ratio of length to diameter which was heretofore considered impracticable or hazardous.

Another object is to provide a machine which combines a maximum length of stroke of the piercing member, even though that member be of unusually small diameter with a minimum overall height and great compactness of the machine.

I attain these objects by providing a vibration- 3 dampening stabilizing member encircling the intermediate portion of the piercing member, and mounting means for the dampening member carried by and vertically yieldable relative to the motor so as to slide upwardly along the piercing member toward the motor when the piercing member is being lowered. This protects the piercing member against breakage due to potential deflection from transverse forces and due to potential vibrations.

According to one feature, a stabilizing device is removably attached to the motor comprising a downwardly extending or depending or inverted vertical post, a stabilizing member or collar in which the piercing tool rotates and which is shiftable up and down upon the inverted post although secured thereon against rotation. A compression coil spring surrounds the inverted post and urges the stabilizing member into its lowermost or lower end position thereon while the lower end of the piercing member is guided in a primary stabilizing member mounted upon the base.

More specifically the inverted post is unitary with an inverted footing or split clamping collar by means of which it is attached to the lower end portion'of the motor. That is, the clamping collar' is tightened around the lower bearing portion of the motor.

According to another feature the motor-supporting bracket which is slidable upon the standard is provided with a downward cylindrical extension hugging the standard, and which by its length effectively guides the bracket thereon. This extension is shaped in such a manner as to serve as a handle for the operator. This serves the triple purpose of providing elfective guiding length for the bracket, of having the direction of force exerted by the operators hand coincide with the vertical axis of the standard, as well as to minimize the structural height of the machine.

More specifically, the lower end of this handle abuts upon an adjustable stop ring surrounding the foot of the standard.

According to one embodiment a yieldable auxiliary stabilizing member is mounted upon and carried by the movable bracket while a primary yieldable stabilizing member is unitary with the main base. The primary member is vertically movable upon a pair of or upon two or more guide posts and is normally urged into an upper limit or upper end position thereon by compression coil springs surrounding the guide posts. The auxiliary stabilizing member descends together with the rotary piercing tool while the primary stabilizing member remains stationary and spaced from the main base of the machine. When the piercing tool is in its topmost position, a lower portion of the tool extends through and downwardly from the primary stabilizing member. That is to say, when in its topmost position it is guided by the two stabilizing members at tWo intermediate points of the exposed length thereof, that is at an upper and lower guide point. As the piercing tool progresses downwardly the upper or auxiliary stabilizing member is arrested by the primary or lower stabilizing member. The tool then progresses further until the slack or vertical lost motion between the auxiliary member and the bracket has been absorbed, at which point the primary member due to engagement by the auxiliary member begins to shift downwardly together with the piercing tool to the end of its available vertical movement and thus to the end of the stroke of the piercing tool.

That is to say, a spring power provided to urge the auxiliary stabilizing member downwardly is so dimensioned as to yield to superior spring power urging the primary member upwardly. In this way the two stabilizing members yield sequentially during the downward progress of the piercing tool.

A'machine constructed according to this invention combines a maximum length of the piercing member even though of unusually small diameter, with a minimum overall height and great compactness of the machine. In that machine the auxiliary stabilizing member extends downwardly from the lower end of the inverted attachable post upon which it is slidable, while the inverted post itself due to the manner of its attachment is disposed significantly close to the axis of the piercing member for effective guidance thereof, and indeed disposed within the distance between the upright posts that guide the primary stabilizing member. Great compactness is attained of the parts relative to one anotherwhen the piercing member reaches the lower limit of its stroke, along with maximum efiective length of its piercing stroke.

These advantages are due to what may herein be called a telescoping or nest ng relationship of the parts, whereby the length of a chuck that holds the piercing member coaxial with the motor shaft overlaps with the length of the auxiliary stabilizing member, while the length of the stabilizing member as well as the length of its inverted post in turn overlap with the length of the vertical posts that gu de the primary stabilizing member. This nesting of the parts for achieving compactness is carried even further by allowing the lower end of the inverted post to extend into and lodge in an opening provided in the base or foot of the machine. This lower limit position of the parts is also defined mechanically due to the bottom face of the bracket handle abutting upon the top face of the adjustable stop ring at the foot end of the standard.

The invent-on possesses other objects and fea tures of advantage, some of which with the foregoing will be set forth in the following description and in the claims, parts will be identified by specfio names for convenience, but they are intended to be as generic in their application to similar parts as the art will permit. In the accompanying drawings there has been illustrated the best embodiment of the invention known tome, but such embodiment is to be regarded as typical only of many possible embodiments, and the invention is not to be limited thereto.

The novel features considered characteristic of my invention are set forth with particularity in the appended claims. ever, both as to its organization and its method of operation, together with additional objects and advantages thereof, will best be understood from the following description of a specific embodiment when read in connection with the accompanying drawings in which 7 a Fig. 1 is a part-sectional side view of the ma: chine representing one embodiment thereof, and showing one stabilizing member unitary with the motor or movable bracket portion of the machine, and'another stabilizing member unitary with the machine base.

Fig. l is a detail view with parts drawn apart to illustrate the manner of detachably mounting the upper stabilizing device. r

The invention itself, how- I Figs. 2, 3, and 4 show sequential operating conditions of the Fig. 1 machine as they occur during the downward stroke of the piercing tool.

The machine in the Fig. 1 embodiment comprises a base or base plate I0 having a socket portion or footing H in which is rigidly fastened a main post l2 upon which is vertically slidable a sleeve or bracket member l3 formed with a cylindrical handle portion l4. This bracket 13 is vertically slidable upon the post 12, its movement being limited by a lower adjustable stop 15 and an upper end stop 16. The post I2 is hollow and encloses a compression coil spring It which urges the bracket member l3 into its upper limit position upon the post I2. The post l2 may be of square cross-section, and the sleeve-like handle portion 14 may be correspondingly shaped so as to be secured against rotation upon the post l2.

Fixedly attached to the bracket l3 and carried thereby is a motor ll with its armature axis vertically disposed. This motor is indicated as comprising a housing body portion 18 and a lower end plate l9 fastened thereto and having a bearing portion or hub 23 from which extends downwardly the lower end portion 2| of the armature shaft. To this end portion of the armature shaft is fastened a chuck 22 removably holding a long needle-like piercing tool 23. By lowering the motor and bracket l3 upon the post I2 the piercing tool may be advanced through opening l0 in the base It! to penetrate into a stack of cloth indicated at T. A flat member or finger or stripper Ni is fastened to. the top face of base lil as by screw 19 so that its free end portion overhangs extending radially into the opening Ill The flat member lil has a slot or orifice [0 through which the piercing tool 23 passes.

The piercing tool 23 is guided by an upper depending stabilizing device 24 unitary with and attached to the motor ll, as well as by a lower up-standing stabilizing device 25 unitary with and fixed to the base Ill.

The upper stabilizin device 24 comprises a split clamping collar 26 tightened around the hub portion 29 of the motor as by a clamping screw 21 whereby the collar is removably fastened to the motor I 'l. Rigidly extending from the collar 23 is an inverted or depending auxiliary guide post 28 having a groove and key sliding connection with a stabilizing member 29, the groove being visible at 29 whereby the member 29 is secured against rotation upon the guide post 28 although vertically slidable thereon. The member 23 has at its lower free end a head or stop 39 defining the lower limit position of the member 29. The member 29 consists of a more or less vertical intermediate or body portion 3| having at its lower end an eye portion 3| a containing a bushing or inset 31 surrounding and guiding the iercing tool 23 and also having an upper end sleeve portion 32 surrounding and slidable upon the post 23 by means of the groove and key connection just mentioned. A compression spring C1 surrounds the guide post 28 to normally urge the member 29 into its lower end position upon the pest. The depending guide post 28 has a base collar 28 formed with a downward extension or gauging rod 28 adapted to determine a maximum compression of the spring C1 when the extension 28 engages the top face 28 of member 23, as will be further described below.

The lower stabilizing device 25 comprises a pair of upright guide posts 33 and 34 disposed symmetrically with respect to the piercing tool 23 and fastened to the base In as by screws 35 and 36 respectively. A saddle-shaped stabilizing or guide member 31 is vertically slidable: upon the guide posts 33 and 34.

The member 31 comprises in the intermediate or body portion thereof an eye 38 containing an inserted bushing 38 surrounding and guiding the piercing tool 23, a pair of upwardly slanting arm portions 39 and 43 extending symmetrically from the eye 38*, each arm portion terminating in a sleeve porton 4| and 42 respectively whereby the member 37 is vertically slidable upon respective guide posts 33 and 34. Compression springs C2 and C3 surround the guide posts 33 and 34 respectively urging the member 31 into its upper limit position upon the guide posts, which upper limit position is definedby head portions or stops 33 and 34-- respectively provided at the upper ends of the posts.

With the bracket 13 in its topmost position in Fig. 1 it will be noted that the lower end of post 28 is a distance V1 apart from the top end of posts 33 and 34. At the same time the eye portion 3| of the stabilizing member 29 is disposed about half-way between the chuck 22 and the eye 38 of guide member 31.

Figs. 2, 3, and 4 show a sequence of characteristic operating positions of the machine as they occur during a downward stroke of the piercing member 23 penetrating into the stack of cloth T. Thus Fig. 2 indicates that the motor ll has been lowered by the operator to the extent that the piercing member 23 has penetrated a distance a into stack of cloth, although the auxiliary stabilizin member 29 still extends downwardly from the lower extreme end of the inverted post 28. In Fig. 3 the motor H has been further lowered showing the piercing tool 23 as having penetrated a distance 22 into the stack, while member 29 has slid from is post 28. In Fig. 4 the motor has been lowered to its lowermost position incident to a penetration of the full depth 0 of the stack by the piercing tool 23, the extreme point P of the piercing tool being shown to have entered into a protective mat M provided at the bottom of the stack upon a work base or table W.

In Fig. 2 the motor l1 and bracket l3 to which it is fixed has been lowered a distance d1 from its Fig. 1 topmost position sothat the upper stabilizing member 29 engages or touches the lower stabilizing member 31, the springs C1, C2, and G3 at this time still being in their Fig. 1 condition, that is of a length Z1 and 12 respectively. At this time the piercing member 23 has penetrated a distance a into the stack of cloth T. The distance V1 of Fig. 1 has now shrunk to the distance V2 in Fig. 2.

In Fig. 3 the motor H and bracket 13 hasbeen lowered an additional distance d2 (see Fig. 1) from its Fig. 2 position. At this time thechuck 22 just clears the bushing or inset 3 l in the upper stabilizing member 29 incident to a compression of the spring C1 to a length 13. The clearance is indicated at L, and is assured due to the extension 28 engaging the face 28 of the member 29. The piercing member has now penetrated a distance b into the stack of cloth T. The depending post 28 now has an overlapping relationship indicated by the distance V3 with the upright posts 33 and 34.

In Fig. 4 the bracket l3 and its motor IT has been further lowered a distance (is at which time the guide member 31 has reached its point of maximum range as determined by the lower face of bracket l4 butting on the upper faces of gauge [5. At this time the piercing member 23 has penetrated the full available distance c into the stack while the inverted-auxiliary post 28 is noted to have an overlapping relationship designated by the distance V4 with the upright posts 33 and 3E.

Indeed, the parts are now compactly associated with one another due to what may be called a nesting or telescoping relationship of the parts, in which the length K1 of chuck 22 overlaps the length K2 0f the auxiliary stabilizing member 29, while member 29 together with inverted post 2-8 in turn overlap the length of the upright posts 33 and 34 which uide the primary or lower stabilizing member 31. In this overlapping" relationship the extreme lower end of inverted post 28 is noted to lodge within the opening 10 of base In. The inverted post 28 being attached to the motor in the manner shown is disposed favorably close to the axis of the piercing member 23 as indicated by the distance X, so that the inverted post extends within the space between the upright posts 33 and as as defined by distance K3.

Furthermore, in Fig. 4 the lowermost position of the parts is such that the chuck 22, and the members 29 and 31 are close upon one another as well as close upon the finger lo and thus close to the top face of stack T1 even as the lower end of inverted post 28 reaches the top face of the stack T through opening Hi This Fig. 4 end position of the parts is also defined mechanically due tothe bottom face F1 of bracket-handle M abutting upon the top face F2 of adjustable stop or stop ring' 15. It will be noted G designates the total effective guiding length for the bracket 13, while H designates the length provided for accommodating the operators hand. Thus, the handle utilizes vertical space available along the standard even though the parts in Fig. 4 may have reached their lower limit nested condition at the end of a downward piercing stroke (see Fig. 4.)

What 1 claim is:

1. A piercing machine comprising a vertically disposed motor having an armature shaft unitary with a chuck at its lower end and having a bracket whereby it is vertically slidable' upon a standard rising from a base, characterized by a relatively lon and thin piercing member held by the chuck; primary stabilizing means unitary with the base for guiding the lower end of the piercing member termedi'ate portion of the piercing member,

mounting means for the dampening member hav ing an inverted post fixed to and extending down Waidly from the 1ower end of the motor with at stop at its lower end, said dampening member being vertically slidable upon said post and extending downwardly from said lower end stop, and compression spring means surrounding the post and urging the dampenin member downwardly against said stop; the disposition of the parts with the piercing member in its lowermost position being such that the chuck, the dampening member, the inverted post and upright posts all overlap with one another in a manner whereby they assume nesting relationship; a bracket naving a tubular downward extension surrounding the standard and shaped to serve as a handle overlapping with the upright posts when in its lowermost position.

2. A piercing machine according to claim 1, with the addition of a vertically adjustable stop member surrounding the foot portion of the standard and adapted to be abutted by said extension at the end of a downward piercing stroke of the piercing member.

SIDNEY WAXELBAUM.

nnrnrtnivcns CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 7 596,782 Mason' Jan. 4, 1898 1,316,027 Halbreich a Se t. 16, 1919 1,316,028 Halbreich Sept. 16, 1919 1,353,051 Laserson 11 is- Sept.- 14, 1920 1,603,337 Gory Oct. 19, 1926 1,831,313 Levedahl- NOV. 17, 1931 2,030,280 Vigliano Feb. 11, 1936 2,077,937 Komow' Apr. 20, 1937

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