US515034A - Method of making pencil or crayon cases - Google Patents

Description

(No'ModeL) Y I 4 Sheets-Sheet 1.

B. WEISSENBORN.

I v METHOD OF MAKING PENCIL 0R URAYON GASES.

N0. 515,034. Patented Feb. 20, 189 1.

WITNESSES.

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(No Model.)

B. WEISSENBORN. METHOD 0]? MAKINGPENGIL 0R GRAYON GASES.

No. 515,034. Patented eb. 20, 1894.

WITNESSES.-

(No Model.) '4 Sheets-Sheet 3.

B. WEISSENBORN. METHOD OF MAKING-PENCIL 0R 'ORAZY'ON GASES.

N0. 515,034. Pate'n tedFebQ 20,1394.

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WITNESSES: INVENTOR THE NATONLL mmmmmmmmmmmmmm Y nnnnnnnnnnnn c.

(No Model.) 4 Sheets-Sheet 4.

WEISSENBORN. METHOD OF MAKING PENGIL 0R GRAYON GASES.

No. 515,034. Patented Feb. 20, 1894.

WITNESSES. INVENTOI? A 7'TOHNEY.

JERSEY CITY, NEW'JERSEY.

EDWARD WEISSENBORN, OF

METHOD OF MAKING PENCIL OR CRAYON CASES.

SPECIFICATION forming part of Letters Patent No. 515,034, dated February 20, 1894.

Application filed October 2,1890. Renewed July 21, 1893. Serial No. 481,138. (No specimens.)

To all whom it may concern.-

Be it known that I, EDWARD Wnrssnnnonn,

a citizen of the United States, residing at Jersey City, in the county of Hudson and State of New Jersey, have invented a new and useful Improvement in Methods of Making Pencil or Crayon Cases, of which the following, taken in connection with the accompanying drawings, is a full, clear, and accurate description.

The object of my invention is to overcome the many and expensive manipulations required in the manufacture of ordinary lead pencils or crayon cases, of wood; and to this end it consists in molding the desired cases from a plastic composition, usually of saw dust of any fancied Wood, a fibrous material as wood pulp or paper pulp, and a binding material for holding the ingredients together, as hereinafter more fully described.

The binding material which I employ is composed of one or more of the following: plaster of paris, ch alk, china clay, resin or pitch, starch, glue; and the several ingredients of my composition are mixed in proportions suited to the different grades of hardness of lead or crayon which is to be inserted in the completed case, Ihaving found that by varying the proportions Iobtain a case graded to the lead or crayon therein, in such manner that in sharpening the pencil or crayon, the

case and lead can be cut with greater ease and less liability of breakage of the lead or crayon than in the cases now in use.

In making pencil cases for the average grade of leads, I use in my composition about the following'proportions: sawdust, one part; wood-pulp or paper-pulp, one and one-half parts, and the binding material consisting of plaster of paris, chalk, or china clay, seven parts; rye flour four and one-half parts; wax one and one-half parts; alum, one-quarter parts; Venetian turpentine, one part; rosin or pitch, one-half of a part; starch, one part; glue, one-eighth of a part; but these proportions can be varied to suit the grade of lead or crayon; the harder the grade of lead or crayon, the larger proportion of sawdust and wood or paper-pulp will be used. Any other binding material or materials which will hold the wood or paper-pulp and sawdust firmly together and allow it to be molded or pressed into the required shape, may be substituted for the above-mentioned binding material. This composition is thoroughly mixed in any suitable vessel and is then ready to be formed into cases.

In the accompanying drawings I have illustrated a machine adapted to be used in carrying out my invention.

Figure I, represents a partial vertical section and partial side view of the machine; Fig. II, a plan view of a portion of the cylinder; Fig. III, an end view of the pencil case forming die; Fig. IV, a longitudinal section of the forming die on the line '22, c, Fig. 3; Fig. V, a like section thereof on theline x, 00; Fig. VI, a vertical cross section of the machine on the line y, y, Fig. I; Fig. VII, a like section of a portion thereof on the line o, c, Fig. I; Fig. VIII, a top view of a portion of the machine. Fig. IX represents'a perspective View partly in section of a lead pencil embodying my invention.

Similar letters of reference refer to similar parts in the various figures.

In now describing the method and opera-- tion of making my improved pencil cases, I will also describe the machine, its various parts and how they co-act.

The above-described composition, being taken from the mixer, is placed in the cylinder A, which rests upon the bed-plate O of the machine, over an opening therein; and in the base plate 0 of which are perforations D, tapering upwardly. A plunger B, fits tightly into the cylinderA, and being pressed downward forces the mixture through the perforations in the plate 0, into a proper receptacle placed under the machine bed-plate, thus rendering the mixture more homogeneous and expelling the air therefrom. This operation may be repeated two or three times.

The cylinder A, is provided at one side, as at A, With a conical opening, which, during the pressing of the mixture above-described, is closed by a tightly fitting conical plug. ter the mixture has been forced through the cylinder A, two or three times or sufficiently to make the mass homogeneous, the base plate 0, is removed a solid plate tightly fitting, is substituted therefore, and a former die E, is substituted for the solid plug in the conical opening A; or the cylinder A, may be made in the first instance with the perforated bottom C and with continuous or solid sides, and, after the mass has become homogeneous bypressure through the same, another cylinder like the cylinder A, but with a solid bottom, and the conical opening A, at its side, may be substituted in its place.

The former die E, is made in conical outer form, and to fit closely into the conical opening A, of the cylinder A. The inner portion E of its interior is formed so as to produce a conical opening of more acute form than its outer sides, while the outer portion G, or that part toward the outer part of the cylinder A, is formed into a cylindrical opening, the size ora trifle larger in diameter than the pencil case to be formed. In the centerof the opening of the former die E, is a core E, which is held in position by wings or supports E and conical in that portion of the die where the die is of conical form, and cylindrical Where the die is of cylindrical form, the conical portion of the core gradually tapering to where it meets the cylindrical portion of the core; said cylindrical portion of the core being a little larger than the size of the lead or crayon to be inserted in the case.

Attached to the bed-plate O, and in close proximity to the cylinder A, are trays or supports P, P, P These supports have in them the slots 19, 19, 19 by means of which and of the screws S, S, S they can be adjusted upon the bed-plate. To the supports P, P are affixed the hangers N, N, in which are mounted the shafts H, M; the shaft M, is provided at its outer end with the graduated speed pulley M, by means of which motion is communicated from any suitable source or power, and the motion of the shaft M,

A is communicated by the gear wheels K-L,

mounted upon said shaft and K, to the shaft H. At the inner end of the shaft H is secured the crank piece R, and screwed to the crank piece R, as at r, is the knife T. Mounted upon the shaft H, are the delivery arms I, I, in such manner that they follow closely the revolution of the knife T. The former die E, being placed in the cylinder A, and the mixture placed therein, and pressure being applied to the plunger B, the mass is forced through the former die E, emerging in the shape of a molded pencil case of continuous length, having a hole therein corresponding with the lead to be inserted. This continuous case 'is received upon the supports P, P, P and as soon as a part equal to the length of a .pencil case has passed through the former part or section of the size of a pencil case over the support P, P and down the incline or chute P attached thereto, and as the mass or mixture in the cylinder is forced through the former die, the knife T, in its revolution cuts off successive pencil case lengths which are pushed down by the arms I, I, into the chute P The knife T, can be adjusted so as to press firmly against the outer end of the former die by shifting the supports P,P and their hangers N,N, by means of the slots and screws before mentioned. The knife T, is prevented from springing outward by a part of the support P, which also serves as a guard or guide to hold the pencil case upon the supports P, P, P it being provided with an arm or projection p The supports P, P may also be provided with the stops 19 to hold the pencil case at the top thereof, until removed by the delivery arms.

After a sufficient number of the pencil cases have been formed and deposited in the chute P, I insert the leads or crayons as follows: I dip about one-half dozen of leads of crayons half their length in glue or other adhesive substance and insert them in the cases. I then dip the other half of the leads or crayons in the glue and force them their entire length in the cases. The cases with their leads are then placed in dies of circular, hexagona'l or any desired form and subjected to pressure and until they are perfectly dry, when they are polished and finished in the ordinary manner.

Any desired coloring matter may be added to the mixture to give the completed case a desired color.

I do not claim in this application the machine herein described but reserve the right to embody the same in aseparate application for Letters Patent.

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

1. In the manufacture of lead pencils, the herein described method of molding'orpressing from a plastic composition a continuous pencil case, then cutting said case into sections of properlengtl1,and then inserting the pencil leads or crayons in said case-sections, substantially as herein described.

2. In the manufacture of lead pencils, the herein described method of molding or pressing from a plastic composition a continuous pencil case, then cutting said case into sections of proper length, then inserting the pencil leads or crayons in said case sections, and

finally subjecting the latter to the action of shaping dies, substantially as herein described.

In witness whereof I have hereunto set my hand this 27th day of September, 1890.

EDWARD WEISSENBORN. In presence of R. THEO. BOSKEROK, LoUIs W. FROST.

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