US2007603A - Striping tool - Google Patents

Description

July 9, 1935. J. T. GREEN STRIPING' TOOL Filed Feb. 2v, 1929 Patented July 9, 1935 PATENT oFElcE i STRIPING 'rooL John T. Green, Detroit, Mich., assgnor to General Motors Corporation', Detroit, Mich., a corporation of Delaware Application February 27, 1929, Serial No. 343,226 2 claims. (olv. 29e-136)" This invention relates to a portable hand tool for applying ornamental stripes or lines on certain objects such as painted automobile bodies, and contemplates particularly a device for striping Duco on Ducoed surfaces.

After automobile bodies, articles of furniture and the like are painted, it is sometimes the custom to add thin stripes of a different color for the purpose of contrast and to enhance the dec'- -orative appearance of the job. For this work vhighly skilled artisans, who command high remuneration and who are difficult to control as workmen have been employed'to apply striping with a hand brush.

It is one of the objects of the present invention to provide a simple and `inexpensive Vtool which, in the hands of the'average person using ordinary care may loe-manipulated to lay down a smooth and uniform line inless time than it takes to paint the linewith a hand brush. Obviously the displacement of the hand brush and skilled labor eirects a material saving in cost.

Another object of the invention is to provide a device in which the supply of striping uid is placed under a constant pressure and is discharged under manual control of the operator at a uniform rate of flow.

A further object is to provide an interchangeable part having a restricted vopening of predetermined size to definitely govern the rate of flow in accordance'with the conditions of use and the peculiar properties of the particular type of striping fluid to be used, it being understood `that the various colors and kinds of striping fluids have different characteristics in regard to density, consistency andthe like. i Asan additional and important object the invention aims to provide an improved type of applyingfnozzle for contact with the work to lay down a stripe and which has one or more feed wires or pins projecting through the bore thereof to multi-perforate the passageway or subdivide it into a number of small spaces through which' the fluid passes to afford a more positive control of the material discharged through the nozzle, or in other words to insure equal distribution of the fluid in the passageway and prevent the material flowing too freely or gushingout of the nozzle, whereby a given amount of liquid for a given width of surface to be covered is properly spread over the surface so as to result in a flat smooth line. This improved type of nozzle possesses the additional advantage of being usable on all surfaces regardless of the plane in which they lie or whether they are of ilat or curved contour.

Various other objects and advantages will be apparent from the followingspeciiication taken in connection with the accompanying drawing in which- Fig. 1 is a plan View of the apparatus constituting the present invention.y

Fig. 2 is a longitudinal sectional view of the stripe applying instrument.

Fig. 3 is an enlarged transverse section of the nozzle tip.

Fig. 4 is a longitudinal sectional view of an alternate type of striping tool. Y

Fig. 5 is a detail perspective View of the feed device shownV in Fig. 4.

Fig. 6 is an enlarged transverse sectional 'view taken `on line 6--6 of Fig. 4.

Referring by reference characters to the accompanying drawing the paint supply unit consists of a paint container or tank I, having a ller spout 2 closed by a cap 3, and a tank 4 for air or other suitable fluid under pressure, having a filler spout 5 for detachable connection with a pressure pump or other suitable source of the air under pressure The two tanks are connected with each .other through the conduit or pipe E,

pressure regulating Ydevice 'I'V having a manually .controlled `valve 8, and the conduit or pipe 9 to V'I'he striping 'fluid'dis'charged from' the tank I under a constant pressure, flows 'through the exible conduit'ID connected at its end by a litting I2 with a barrel I3 of the stripe applying instrument. The barrel is provided intermediate its ends with aY wall lf3,A having passageways I5 and I6 connected with a transverse passageway II, in which is formed a conical seat for the valve head I8, having the oppositely projecting stems I 9 and 22. The stem I9 has a bearing in the plug 20 and a coil spring ZI surrounding the stem bears at opposite ends against the plug 2@ and valve head I8 to urge the valve against its seat. The

23 and into contact with the hand lever 24 pivoted 'marking of a uniform flat line.

on the pin 26 between a pair of ears or lugs 21 formed integral with the barrel. A set screw 28 adjustably threaded in the boss 29, integral with the barrel, has a stem or reduced portion 30 projecting through an opening in the lever 24 to provide a stop shoulder for the lever, the end of the stem having a transverse groove to facilitate adjustment of the screw by engagement therewith of a suitable tool. In each end of the passageway through the barrel and on opposite sides of the intermediate wall is positioned a perforate cylinder or roll 3i, preferably formed by rolling upon itself a sheet of fine mesh screen, which is intended to break up or check the velocity of the iiuid flow through the barrel. In the forward end of the barrel is screw-threaded a replaceable fitting 33, having a restricted passageway or bore 34 of predetermined diameter. This coupling controls the amount of fiuid allowed to pass through the tool and the size of the restriction `is predetermined in accordance with the character of striping fluid employed and the width of the line to be laid down. By providing a number of interchangeable fittings, each with a different size bore, the requisites and conditions of use for any particular job can be met. 'I'hreaded on the end of the fitting 33 is a nozzle 35 having a tip 36 of reduced diameter, and fastened in the nozzle, as by means of solder, as indicated at 31, are a series of fine steel wires 38, which project through the reduced tip portion 36 and preferably though not necessarily to a point slightly beyond the end thereof. These wires 38 serve to divide the bore of the passageway into a number of small spaces to equally distribute the fiuid flow throughout the bore of the nozzle tip and insure the The uid feeds along and between the wires and the frictional resistance offered to the flow serves in a measure to prevent the iiuid gushing out of the discharge nozzle and forming blotches or smears.

In order to accurately guide the nozzle along the work which, in the present instance, is shown as a curved molding strip 40, positioned in a vertical plane, there may be provided a carrier or fixture 4I adjustably secured on the nozzle and carrying a shaft on which are mounted guide wheels 42 for contact with the molding strip and a roller 43 for contact with the body adjacent the molding strip. Other forms of guiding means may be employed depending on the character and nature of the work to be striped.

In the alternate form illustrated in Fig. 4 a valve housing 50 projects through openings in opposite sides of the barrel I and is provided with a vertical bore 52 connected by the lateral ports 53 and 54 opening into the passageway in the barrel 5| on opposite sides of the casing 50. A valve head 55 having a seat in the bore 52 intermediate the ports 53 and 54, controls fluid flow through the barrel and is provided with a stem V56 extending to the outside of the casing through .the packing nut 51 for engagement by the hand lever 58, pivoted at 59 to the lug 6l). A coil spring 6| interposed between the valve head 55 and the plug 62 tends to hold the valve on its seat and the stem 56 depending from the valve head is adapted for contact with the set screw 61, adjustably threaded in the plug 62 and heldin adjusted position by the lock nut 68 to control the extent of valve opening. Screw threaded in the front end of the barrel 5I is a replaceable member 10 counterbored in one end, and having one or more restricted openings 1| of a given size through the end Wall thereof, for definitely controlling, according to a predetermined schedule, the amount or volume of fluid allowed to pass through the barrel. A forwardly projecting feed pin 12 is carried by and has a pressed fit in the end wall of the member and extends through the nozzle 13, adjustably screw threaded on the member 13, to a point adjacent the end of the tip 14. The opening in the end of the tip is of reduced diameter and the pin 12 has a close fit therein, but is provided with a series of axial grooves which extend into the portion of the bore that is of larger diameter, and in this fashion divide the bore at the tip into a series of small passages to prevent gushing, and to evenly distribute the striping fluid. Adjustment of the nozzle 13 relative to the member 10 moves the pin into or out of the bore to permit these parts to be brought to proper position for the discharge of the fluid onto the surface to be covered and after adjustment is made, the parts are held in proper position by means of the lock nut 16.

In using the apparatus, the operator carries the supply unit in one hand and the barrel in the other hand, holding the nozzle iirmly against the work and drawing it along the surface to be covered, at the same time depressing with his finger, the valve lever to open the valve and permit discharge of the striping fluid.

I claim:

l. A nozzle tip for ornamental stripe applying tools adapted for contact with a working surface and provided with a bore therethrough for the passage of striping fluid, and a pin tting the f tending axially through the bore to a point adjacent its end and closely fitting in the reduced portion of the bore and having peripheral grooves therein extending axially from its end within the reduced portion of the bore into the portion ofthe bore of larger diameter to provide a series of fiuid passages in the work contacting tip of the nozzle.

JOHN T. GREEN.

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