Патент USA US2132240код для вставки
06¢. 4, 1938. ' o‘ |__ HOPE ‘ _ 2,132,240 MEANS FOR GRINDING CARD FLATS Filed March 8, 1937 ‘1 I 4 Sheets-Sheet 1 l kit gwue/rvbo'b' / ' ORV/LL15 L. Hops Oct. 4, 1938. o. L. HOPE 2,132,240 MEANS FOR GRINDING CARD FLATS Filed March 8, 1957 4 Sheets-Sheet 2 OPV/LLE L. HOPE Oct. 4-, i938. O‘ L. HOPE MEANS FOR GRINDING CARD FLATS Filed March 8, 1937 4 Sheets-Sheet 5 law? § mm, 6 ORWLLE L. HOPE 0cm 4, 1938, ' 0. L. HOPE 2,1323% MEANS FOR GRINDING CARD FLATS Filed March 8, 1957 4 Sheets-Sheet 4 ORv/LLE L. HOPE 2,132,240 Patented Oct. 4, 1938 UNITED STATES PATENT OFFICE 2,132,240 MEANS FOR GRINDING CARD FLATS Orville L. Hope, East Gastonia, N. G. Application March 8, 1937, Serial No. 129,644 2 Claims. (Cl. 51-243) This invention relates to a card grinding appa ratus for grinding card ?ats and more especially to means for properly positioning the flats rela tive to the card grinder as the flat teeth are ground thereby. In the grinding ‘of card flats it has been the practice to guide the upper por tion of, each end of the ?ats as they pass be neath the grinding cylinder by a pair of slides. These portions were held in sliding contact with 10 said slides by means of suitable pressure apply ing means such as dogs which engaged the lower side of the ?ats at two intermediate points, each of the intermediate supporting points being an appreciable distance from the end of the ?ats. ' In order to exert sufficient upward pressure at each point to normally hold the upper side of the card ?at against the two slides, an apprecia ble amount of upward de?ection‘ was caused in the central portion thereof thereby causing the 20 teeth in this central portion to be ground more than the teeth at each end. This practice causes what is commonly known as hollow ?ats which in turn, causes defective carding when they are in operation with the carding cylinder. It is therefore, an object of this invention to vprovide an apparatus for grinding the teeth on card ?ats comprising a grinding cylinder, with guiding means for positioning the ?ats in grind ing relation thereto and a pair of. weighted sup 30 porting means disposed at each end and on the lower side of said ?ats directly opposite said guiding means for holding the card ?ats in proper position relative to said guiding means and said grinding cylinder. By providing the supporting 35 means oppositely, or directly beneath said guid ing means, it is evident that the amount of pressure exerted by the supporting means will not in any way cause the central portion of the card ?at to be de?ected upwardly. Therefore, 40 it is only necessary to provide an intermediate supporting means to compensate for the weight of the ?at itself. This is done, where necessary, by providing a weighted support directly be neath the central portion of the ?at to prevent any downward de?ection thereof. Should the upward supporting means be disposed several inches from each end of the card flat and if only enough upward pressure is exerted thereon to compensate for the de?ection dueto the weight 50 of. the flat itself, then this upward pressure would not be su?icient to hold. the top ends of the ?at in contact with the guiding means during the grinding operation. It is a further object of this invention to 56 provide a card ?at having supporting means be neath each end thereof normally pushing its ends against a pair of guiding means, said guid ing means comprising a pair of stationary beveled surfaces which cause the ?at to be so positioned that each of the teeth in the upper side of the 5 card ?at will occupy the same position relative to-the grinding cylinder as the card ?at passes thereby. Some of the objects of the invention having been stated, other objects will appear as the de- 10 scription proceeds, when taken in connection with the accompanying drawings, in which: Figure 1 is a side elevation of a portion of a card machine showing my invention applied thereto; 15 Figure 2 is a cross sectional detail view through the carding machine taken along the line 2-2 in Figure 1; Figure 3 is an enlarged detail View of the end of, card ?at grinding apparatus which is also 20 shown in Figure 1; Figure 4 is a vertical sectional view taken along the line 4-4 in Figure 2; Figure 5 is a sectional plan View taken along 25 the line 5-5 in Figure 3; Figure 6 is an isometric view of the supporting means for the other end of the card ?ats from that shown in Figures 3, 4, and 5, one of the sup porting means being shown in the left-hand por tion of Figure 2; Figure '7 is a vertical sectional View taken along the line 1-4 in Figure 2; Figure 8 is an enlarged detail view looking at the end of the ?at showing its position relative to the supporting means, guiding means, and grinding cylinder when the ?at is passing be neath the grinding cylinder. Referring more speci?cally to the drawings, the numeral l0 denotes the framework of a suitable card machine which has rotatably 40 mounted as at H, a card cylinder [2 which has teeth l3 therein, which normally cooperate with the teeth I4 in card ?ats l5 during a carding operation. The framework H] has mounted at one end thereof a lap roll l6 which is fed beneath as feed roll I‘! into licker-in chamber 18 and then between the card cylinder I2 and the card ?ats l5 to card the ?bers and remove foreign matter therefrom and to aline the ?bers. The card ?ats M are secured to suitable chains 20 and 20’, said 50 chains being mounted on suitable conventional rollers 21, 22, 23, and 24, which, in turn, are supported by brackets 25, 26, 21 and 28,‘ respec tively. After continued use, it is necessary to sharpen 55 2 2,132,240 the teeth M in the card ?ats; therefore, a suit able grinding mechanism has been employed, comprising a pair of supporting stands 30 and 30' which have brackets 3! and 3|’ adjustably se cured to the upper end thereof by any suitable means such as bolts 32 and 32' respectively. The bolts 32 and 32’ clamp the brackets 3| and 3|’ to their support and the bolts 33 and 33’ hold the brackets 3| and 3|’ in the adjusted position. ll) The brackets 3| and 3|’ are adapted to support a suitable shaft 35 upon which is mounted a grinding cylinder 36. Suitable guides 31 and 31' are secured to supporting stands 30 and 30’ by means of bolts 38. Fixedly secured to the lower surface of said guides are beveled strips 39 and 39' which strips normally guide the top sur faces 4!! on each end of the card ?ats, when the card ?at is in grinding position. Disposed di rectly beneath the beveled strips 39 and 39’ and 20 also directly below the ends of card ?at I4 are supporting means 42, 43 and 42' and 43’, the supporting means 42 and 43 being adapted to support the right-hand end of card ?at l4 as shown in Figure 2, and the supporting means 42’ 25 and 43' being adapted to support the left-hand end thereof. Levers, or supporting means 42 and 43 are ?xedly secured to stud shafts 44 and 45 which in turn, are rotatably mounted in end support 30. The other ends of shafts 44 and 45 have ?xedly secured thereon levers 48 and 49 which have weights 50 and 5| respectively, adjustably secured on the ends thereof. By regulating the distance at which a weight 50 or 5| is located relative to the stud shafts 44 and 45, the amount of upward pressure exerted by the supporting means 42 and 43 can be effectively regulated.’ The construc tion of the weighted levers 42’ and 133’ is identi cal, and therefore, no description will be made, 40 but like reference characters with prime notations will be given to like parts. The supports 33 and 30’ have integral there with lower guide supports 55 and 56 which sup port the lower ends of the card ?ats I4 prior to their approach to grinding position and after they have passed beyond the grinding position. While the card ?ats are in grinding position, the supporting means 42 and 43 ?exibly support the flat in a position where the surfaces 40 and 40' will engage the lower side of bevel strips 39 and 39’ respectively. It is necessary to provide a, pair of weighted supports such as 42 and 43 beneath each end of the card ?at when the same is in grinding posi 55 tion because of the irregularity of the construc tion of the lower side of each end. If only one dog were provided a uniform upward pressure could not be exerted under the entire breadth of the ?at ends so that the upper surfaces 40 and 40’ 60 of the ?at would be held in ?rm contact with strips 39 and 39'. It is also necessary to overlap the free ends of pressure applying means 42 and 43 so that both members will simultaneously engage the ends of the ?at from the time it 65 comes to grinding position until after it has been ground. When it is desired to eifect a grinding opera tion, a belt 60 is mounted upon pulleys 6| and 62, and the cylinder 36 is caused to rotate in a 70 counter-clockwise manner in Figures 1, 3, 7 and 8. At the same time the weights 50 and 5! and their associated, parts are placed in their proper position in order to exert the proper'upward pressure beneath the lower ends of the flats. The ?ats M are then caused to rotate in a counter 4 clockwise manner in Figure 1 to thereby cause the top ends of the teeth M to engage the periph ery of grinding cylinder 36 in a manner shown in Figure 8. It will be noted by referring to Figure 9 that since the surfaces 40 on the end thereof normally engage the lower beveled sur face of the strip 39, which is shown in dotted lines, the end of the card ?at will gradually move downwardly away from the grinding cylinder as the ?at is moved to the left in the direction of 10 the arrow; however, it will also be noted that the point of each of the teeth will be ground exactly at the same angle, although, the teeth in the left-hand edge of the ?at are slightly shorter than the teeth on the right-hand edge thereof. 15 This difference in length is very much exaggerated in the drawings in order to properly illustrate the principle involved. By so grinding the teeth in the card ?at in this manner, when the teeth are placed in carding position as shown in the lower portion of Figure 7, the long teeth on the right-hand side of the ?at in Figure 8 are dis posed at the same distance from the card cyl inder teeth l3 as the short teeth, since the bev eled upper ends 46 and 40’ rest upon the ?exible 25 arch supports 63 and 63’ on each side of the card cylinder, the periphery of the arch supports being concentric with the periphery of the cyl inder teeth. By grinding the ?at teeth in the manner shown in Figure 8 the proper point is 30 ground on each individual tooth and the pointed ends on all of the teeth fall in a plane which is parallel to a plane passing through top beveled surfaces 40 and 40'. By so grinding the heel and'toe will be equidistant from the card cyl inder when in operative position. The dotted line 65, in Figure 8, represents the line along which the dogs 42 and 43 exert up ward pressure upon the lower side of ?at during the grinding operation. 40 In order to compensate for the de?ection caused by the weight of the ?at I4 a suitable cross bar 66 has its ends ?xedly secured in the supports 30 and 30’. Secured to the central por tion of bar is a bracket 6'! by any suitable means 45 such as bolt 68, said bracket having pivoted as at 69 a lever 70. This lever has the left-hand portion thereof, (Figure '7), extending upwardly and normally engaging the lower intermediate portion of the ?at l4. Where the ?ats have been 50 properly designed as to strength it is seldom that this pressure applying means is necessary; how ever, in case of a very weak structure where the stress caused by the grinding and the initial weight of the flat will cause downward de?ection 55 in the central portion thereof, it is necessary to provide a lever 70 pivoted as shown with a suit able adjustable weight ‘H secured on the end thereof. It is quite evident that if there is a de?ection of the ?at in the central portion thereof, that this point is the proper place to apply the weight to remedy the defect. As heretofore stated, should the weight be applied at a short distance from each end, then at least two of such devices as shown would be necessary and at the same time it would be very much harder to determine the amount of upward stress necessary at these points to pro duce} the desired upward de?ection at the cen tral portion thereof; however, it would also be .70 necessary to add additional stress for holding the ends’40 and 40' in contact with strips 39 and 39'. This additional stress, of course, would cause an objectionable upward de?ection at the 3 2,132,240 center of the ?at and cause the teeth at the point to be ground more than necessary. It is therefore seen that I have provided a ties of the ?ats in the same vertical plane in which said ?xed cam means are disposed to hold the ?ats against said cam means while the teeth apparatus comprising a pair of guide ways for properly positioning each ?at as it passes by the grinding cylinder and means disposed di thereof are engaged by said grinding cylinder, and means for engaging the central portion of the ?ats for holding their central portion in the same horizontal plane occupied by the ex rectly below the ?at ends and said guiding means for exerting upward pressure against the lower tremities of the ?ats while the ?ats are in grind~ ing position. ends of the ?at to hold them in the proper po sition relative to the cylinder. In the drawings and speci?cation there has been set forth a preferred embodiment of the invention, and although speci?c terms are em 15 ployed, they are used in a generic and descrip tive sense only, and not for purposes of limita tion, the scope of the invention being set forth in the appended claims. I claim: 1. In a carding machine having a carding cyl 20 carding cylinder and a pair of endless chains card grinding apparatus for grinding ?ats, said inder equipped with card clothing provided with teeth and having a pair of endless chains to which the ?ats are secured and said ?ats hav ing teeth therein for cooperation with the teeth 25 on the card clothing, apparatus for grinding the teeth on the ?ats comprising a grinding cylinder disposed transversely of the machine and in alinement with the ?ats, ?xed cam means for engaging the upper surfaces of the extremi 30 ties of the ?ats as they approach and move past the grinding cylinder, a pair of weighted, piv oted and oppositely directed levers having side by side cam portions for engaging the extremi 2. In a carding machine having a frame, a to which a plurality of toothed ?ats are secured, apparatus for grinding the teeth on the ?ats com prising a pair of brackets secured to the sides of the frame, a ?xed cam on each bracket for engaging the extremities of the ?ats as they are moved past the cams, a grinding cylinder for engaging the teeth in the ?ats, a pair of pivoted levers having side by side end portions disposed in parallel relation and having cam surfaces thereon for engaging the extremities of the ?ats on their lower sides in the same vertical plane as that occupied by the said ?xed cams, a weight on each lever for holding the said parallel end portions against the said ?ats to press the ex tremities of the ?ats against said cams while the ?ats are being passed beneath the grinding cylinder and a pivoted lever having a weight on one end and a cam surface on the other end for engaging the central portion of each ?at as it is ‘’ moved beneath the grinding cylinder. ORVILLE L. HOPE.