US1053908A - Method of preparing tinned sheet-iron boxes, &c., for detinning. - Google Patents

Description

H. GOLDSOHMIDT.

METHOD OF PREPARING TINNED SHEET IRON BOXES, &C., FOR DETINNING. APPLIUATIQN FILED JUNE 30, 1911 1953,908 Patented Feb. 18, 1913 2 SHEETS-SHEET 1.

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H. GOLDSGHMIDT. METHOD OF PREPARING TINNED SHEET IRON BOXES, 610., FOR DETINNING. APPLICATION FILED .TUN1J30. 1911.

1,@58,98 Patented Feb. 18, 1913 2 SHEETS-SHEET 2.

UNITED STATES PATENT ()FFIQE.

HANS GOLDSCHMIIDT, or nssnn-on-rnn-nunn, GERMANY, assronon T0 GOLDSCHMID'I. DETINNING COMPANY, or new YORK, N. Y., A CORPORATION on NEW JERSEY.

METHOD OF PREPARING TINNED SHEET-IRON BOXES, 800., FOR DETINNING.

Specification ,of Letters Patent.

Patented Feb. 18,1913.

Original application filed January 22, 1907, Serial No. 353,536. Divided and this application filed June 30,

1911. Serial No. 636,152.

To all whom it may concern Be it known that I, HANS GoLnsoHMID'r, doctor of chemical science, asubject of the King. of Prussia, German Emperor, and resident of Essen-on-the-Ruhr, in the German Empire, have invented new and useful Improvements in Methods of Preparing Tinned Sheet-Iron Boxes, &c., for Detinning, of which the following is a specification. a

My present invention is a division of an application filed by me January 22, 1907, Serial No. 353,536, and'is in the nature of an improvement upon that shown, described and claimed in Letters Patent No. 804,530, granted to me November 14, 1905, which patent relates to a'sim-ilar method of preparing sheet-iron boxes, etc., for detinning. In practice it has been found that when a method and apparatus such as set forth in said prior patent are used, only a certain size of boxes or other material can be properly treated and fed in a regular manner between the rollers by which the boxes are to be compressed, the size of the boxes, etc,

being proportionate to the width of the pass between the rollers. When boxes of too large a size are fed to the rollers they are not properly presented and are notfed at once into the pass between the rollers, but roll about in front of the pass, sometimes for a considerable length of time, before they are caught and positively fed into the pass by the projecting perforators with which the rollers are equipped. Constant attention on the part of the workman in charge of the machine is required when boxes of excessive size are fed into a machine of the type illustrated in my prior patent.

The principal object of my present invention is to improve the method disclosed. in said prior patent for preparing boxes for detinning, and in doing so I have found it necessary to divide the compressing function into two distinct parts, and I preferably divide each of the two main functions, that is, both the compressing and perforating, into two distinct parts. To divide the compressing function into two main partsIprovide an additional pair of compressing rollers, which operate uponthe tinned boxes,

etc., and compress the same partially before such partially compressed boxes are fed to the second pair of rollers, where they are posed below the first pair and will receive the partically compressed tin-boxes, etc., directly therefrom. The two pairs of rollers may be rotated'by any suitable means, as for example, by a train of gearing-driven from a suitable source of power.

The same method should be capable of treating both large and small sizes of boxes,

' and in order to permit this the width of the pass between the first pair of rollers should be capable of adjustment to accommodate boxes of different sizes. This adjustment may be obtained by mounting one Df-therollers of the firstpair in such a manner that it may be adjusted toward and from the other and securely held in placein any desired, adjusted position, this adjustment being usually in a horizontal plane. In this way the pass between the first or upper pair of rollers into which boxes are fed in any suitable manner, is increased or decreased in width to correspond to the size of the boxes to be compressed, and thus the shifting androlling about of the boxes at the entrance of the .pass is prevented, and each box is properly caught between the rollers and compressed as soon as it is presented at the .pass. After the first partial compression, and also partial perforation, when the rollers of the first pair are provided with perforators, the flattened partially compressed-and perforated boxes are delivered to the lower pair of rollers by which said boxes are fully compressed and completelv perforated. Suitable means are provided for scrapin oil the com ressed and perforated boxes rom the rol ers of each pair and assuring the delivery of the partially compressed boxes directly to the pass betweenthe rollers-of the lower pair.

In the drawings which illustrate an apparatussuitable for carrying out this method of preparing'boxes, cans, etc., fordetinning, Figure l is a front elevation, partly in transverse section, the sect-ion being taken in the line 0-4), Fig. 2, with the motor removed;

Fig. 2 'is a side elevation and longitudinal section of the same, the section being taken in line A-B, Fig. 1; Figs. 3 and dare details of a specific type of perforator preferably employed for puncturing the'tinned boxes, etc., the perforator being shown full size.

Referring now to the drawings, 1 repre' sents a source of power of any suitable kind, an electric motor being here illustrated,- and 2 a driving pulley secured to the shaft of the motor, from which pulley movement is trans mitted by a belt 3 to a driven pulley, such as 4, here shown as of large size. The rotary movement of this driven pulleyv may be transmitted by means of a train of gearing, such as 5, to thetwo pairs of rollers which operate upon the material. The rollers of the first or upper pair are designated respectively by 6 and 7, and those of the secs 0nd and lower pair are designated respec tively by 8 and 9. The comparative sizes of therollers of the first and second pairs should be such that the material will be operated upon at the first stage of the operation by surfaces traveling at a slower speed than during the secondstage of the operation. For this reason the rollers of the first or upper pair are of larger diameter than those of the lower pair, and the surfaces thereof move at a lower circumferential speed than the surfaces of the rollers of the lower pair.

The two pairs of rollers may be mounted in aframe structure of any suitable type, such for example as that illustrated at 10. The rollers themselves are intended not only to compress the material but also to perforate the same, and bothlpairs of rollers are preferably provided with suitable perforators for puncturing the boxes. I prefer to use a type of perforator such as shown in detail in F igs. 3 and 4, the body portion of such perforator being pyramidal, as shown rollers. v readily puncture the boxes and other mataat 12. These perforators roject from the surfaces of the rollers and cover substantially the whole of the surface of each roller to whichthey are applied. The perforators will usually be arrangedin regular rows both lengthwise and circumferentially of the Perforators of this construction reaaeos carried by the lower pair of rollers and are also disposed somewhat farther apart than those of the lower rollers. The object of this is to effect a coarse preliminary puncturing of the material as well as a partial compressing by the rollers ofthe upper pair, after which the complete compression of the materialwill be effected by the rollers of the lower pair, and at the same time the per forators carried by the lower rollers will thoroughly puncture the boxes, etc., at a larger number of points than the perforators of the upper rollers. Thus when the treatmentis complete the material will be in such a condition that the chemicals used in the subsequentdetinning process will have free access to all parts of such material.

An important feature of the apparatus used in carrying out this method relates to the adjustment ofv the Width of the pass between the first pair of rollers. The adjustment of this pass is in this case eflected by shifting the roller 6 to any oneof a number of positions horizontally relatively to the cooperating roller 7 This roller 6 is so mounted that it can be shifted readily horizontally .on the upper frame-piece of the frame 10.

The upper frame-piece is here shown as having a series of holes 14 passing therethrough, through which bolts, such as 13, carried'by the bearing 0r pillow-block for the shaft of the roller 6 may pass and be secured in place by the usual nuts. Sets of o enings l lare shown at each side of the sha' t supported by such pillow-block, in order that the pillowbloek may be bolted down securely at both sides thereof. A suilicient number of holes should be provided to permit the adjustment of the roller 6 to the necessary positions for handling all the different sizes of boxes intended to be compressed by the machine. It is obvious, of course, that'other means may be employed for adjusting the position of the roller 6 with respect to the roller 7 and varying the width of the pass between said rollers.

Any suitable provision may be made in the power transmitting mechanism for permit ting of the described adjustment of the roller 6 relatively to the roller 7. For instance, the depth of the teeth of the gear wheels shown is such as to maintain an operative mesh while permitting of a certain limited adj stment of the said rollers, while any additional adjustment of the latter might be provided by substituting gear wheels of different and desired diameters.

in practice the boxes to be compressed and perforated are delivered to the machine from above between the upper rollers 6 and Y, the direction of feed being indicated by the arrow 11 in Fig. 2. After the boxes are caught by the sharp points of the perforators carried by the upper rollers. 6 and 7 these boxes will be fed positively into the pass between said rollers and partially compressed, at the same time being perforated throughout their area by -the coarse perforators carried by said rollers. After being thus partially compressed and perforated, some of them will fall in the direction indicated by the arrow 18 between or onto the rollers of the lower pair and will be caught by the rotating perforators carried by such rollers; while some of the boxes so partially compressed will cling to the perforators of the upper rollers and will be carried along with such rollers in their rotation until they are near or beyond the vertical planes passing through the axes of the upper rollers, when they must positively be removed from the perforators of the upper rollers in order to prevent them from being carried back to the upper side of the pass between said rollers. Such boxes as cling to said perforators may be removed therefrom by suitable scrapers, such as the plates 15 arranged substantially tangentially to the rollers and extending the whole length of the same. These scrapers are fastened to the upper portion of the framework in any suitable manner, and preferably have V-shaped tooth-spaces sub stantially complementary in size and shape to the V-sha-ped or pyramidal perforators 12 of the upper rollers, and lying respectively in the planes of rotation of such pyramidal perforators carried by the upper rollers. These scrapers 15 scrape off the compressed and paitially perforated boxes clinging to the perforators as such perforators with the boxes clinging thereto, come adjacent to the scrapers, and cause such boxes to drop upon suitable guide-walls, such as 16, attached to the scrapers l5 and to the upper part of the framework, as for example by means of channel -irons 17. These slanting walls serve as guides to direct the falling par-,

tially compressed end perforated boxes to the entrance of the pass between the lower rollers, at the arrow 18, between which rollers the boxes are fully compressed and perforated at a greater number of points in their surfaces by the finer perforators carried by the lower rollers. After being thus fully compressed and perforated the boxes, etc., leave the pass bet-ween the lower rollers and fall into a suitable receptacle (not shown) provided for the purpose. The.

lower rollers should also be provided with suitable means for removing the boxes which may cling to the perforators carried thereby. The means employed may be scrapers 20'similar to those shown at 15 and operating in the same manner, but having finer, that is, more closely spaced and smaller, tooth-spaces lying in the planes of rotation of the respective pyramidal perforators carried by the lower rollers.

lVhat I claim is 1. A method of preparing tinned boxes and the like for detinning, consisting in first partially compressing and perforating said boxes, and then further compressing the same.

2. A method of preparing tinned boxes and the like for detinning, consisting in first partially compressing and perforating saidboxes, and then further compressing and perforating the same. 7

3. A method of preparing tinned boxes and the like for detinning, consisting in first partially compressing and coarsely perforating tinned'boxes, and then further compressing and finely perforating the same.

v 4. A method of, preparing tinned boxes and the like for detinning, consisting infirst partially compressing and perforating said boxes, and simultaneously feeding the same, and then further compressing and perforating said boxes, and simultaneously feeding the same;

5. A method of preparing tinned boxes and the like for detinning, consisting in first partially rolling and perforating tinned boxes, and then further rolling and perforating the same.

6. A method of-preparing tinned boxes and the like for detinning, consisting in first partially rolling and simultaneously coarsely perforating said boxes, and then further rolling and simultaneously finely perforating the same. I

7. A method of preparing tinned boxes and the like for detinning, consisting in first partially rolling and perforating said boxes, and simultaneously feeding the same, and then further rolling and perforating said boxes, and simultaneously feeding the same.

8. A method of preparing tinned boxes and the like for detinning, consisting in first partially compressing said boxes and then further compressing and simultaneously perforating the same.

HANS GOLDSCHMIDT. L. 8.

Witnesses:

CHAS. J. WRIGHT, ALFRED HINKEL.

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