US2066843A - Hosiery knitting machine - Google Patents

Description

A. LOIMANN HOSIERY KNITTING MACHINE Jan. 5, 1937.

Filed Feb. 8, 1934 2 Sheets-Shegt 2 .Iu ll I'IZVE'IZ'ZPOH:

-- Anton Lo' Patented Jan. 5 1937 I Anton Loimann, Chemnitz, Germany Application February a, 1934, Serial No. 110,333 I In Germany February 22, 1933 3 Claims. (CI. 66-98) The invention relates to a presser capable of forwardand retrograde movement for fiat hosiery knitting frames. According to earlier propos als thesepresser devices were mounted under the sinker head, which has the very considerable disadvantage that the adjustable presser bar parts restrict the space for the knocking over combs. In order to eliminate the difficulties associated therewith it has even been suggested to mount comb shaped presser bar parts underneath the knocking over comb and to allow them to extend through the latter. In-all these cases the presser bar was only accessible with difliculty and subsequent adjustment was inconvenient. In addition separate supporting devices for the presser bar were necessary.

According to another suggestion a presser bar comb was adapted to be suspended above sinkers in the manner of a tickler machine, but

this considerably affected the supervision of the machine. In addition a presser bar comb of this character must be withdrawn from the.

reach of the needles while placing the thread so that theknitting operation is retarded. It was further considered to retain the sinker bar underpart consisting of a number of relatively adjustable parts. In this connection however, the dividing points of the sinker bar underpart must each necessarily lie within the reach of a sinker so that no needle will be located within the reach of two presser bar parts projecting forwardly differentdistances and is exposed to the liabi1- ity of being damaged. The sinkers provided at the said dividing points however cannot be guided reliably for this purpose. In the construction of knitting machines it has however, not been found possible to effect subdivision of the parts necessary for guiding, the sinkers so that ,if possible they are omitted. It may also be mentioned-that tl". width of the'middle part of a subdivided sinker head underpa'rt cannot be varied so that the use of these bar heads is restricted to a definite width of hosiery. An exchange of the sinker head under-part, is very inconvenient-so that modifications and improvements are difficult to carry out.

An object of the present invention is to eliminate the defects of the known adjustable presser bars and particularly to avoid the necessity of providing separate bearing points for supporting the movable presser bar parts while still retaining easy supervision of the machine and a compact arrangement thereof. Another object of the invention is to facilitate the replacing of the presser bar parts used by others when changthe upper part I and forms the owever,

ing to another method of operation for reasons of changing the pattern, without affecting the operation of the knitting machine.

According to the invention, the movable press parts are supported on the-upper sideoflthe sinker head and are so guided thereon that they overlap the latter and have their. comb-likelower parts extend between the sinkers.

The accompanying drawings show an example of construction according to the inventi0n:--

Figs. 1 and 2 show in vertical section and in plan respectively a simple form ofconstruction of the invention of the application.

Figs. 3 and 4 show in vertical section and plan a form of construction which permits of a variation in width of the press part capable of retrograde movement.

Fig. 5 shows a sinker bar head with a modified construction of the adjustable presser bars, and the drive mechanism for the latter.

Fig. 6 shows in plan the attachment of the presser bars to an adjustable bar according to Fig. 5. s

Fig. 7 is a cross-section through the adjustable-bar with the clamped presser bars according to Fig. 5.

Fig. 8 shows a sinker bar head with an adjustable presser device extending over the whole front.

Fig. 9 shows the arrangement .of a sinker bar head with an adjustable presser device and a knock-over combarranged below the same, the knock-over bars arranged below the adjustable presser bars having shorter tongues than those which lie under the fixed presser bars.

In front of the two 'side parts of the needle bed the sinker head consisting of the upper part I and the under part 2 has the usual shapev Into the juxtaposed sides of the parts I and 2 is cut a large number of narrow slots for guiding the jack and dividing sinkers 3. The lower part 2 projects slightly beyond the front edge f the presser bar edge In which extends upwardlybetween the notched sinkers 3. I

In order to enable a similar shaped retractable presser bar part to be provided in front of the middle part of the needle bed, a suitable recess 4 is provided in the front edge of the sinker head under part 2 and on the sinker head upper part I there is placed an auxiliary bar 5 which within reach of the middle bed part is provided with an inclined downwardly directed projection 6. This projection is formed at its lower edge into a press part I provided with pasof separate elements '8 as When it is desired to so arrange the retractable press part 1 that its width is variable within predetermined type of stocking to be produced the foot portion can be made narrower or wider, the downwardly extending projection 6 and the presser bar parts 1', according to Figs. 3 and 4, are made only of such a width as corresponds to the narrowest sole foot portion to be produced on the machine in question. In this case, however, separate auxiliary presser bar parts 8 are adapted to be exchangeably secured to the bar 5 on both sides of the press'er'bar parts 1' so' that according to the width of the foot portion required at any time the retractable press parts can be made wider or narrower.

The auxiliary presser bar parts 8 are of 'similar shape to the above described retractable presser bar parts I except that their upper securing lug must be at such a level that it can be screwed firmly to the bar 5. The auxiliary press er bar parts 8 may be kept in stock in different widths and be so graded that the total widths of the presser bar parts I, 8, can be adapted to any suitable number of needles within the required limits. Each of the auxiliary presser bar parts 8 is provided with slots through which the sinkers 3 lying in the path thereof can pass. If desired the auxiliary presser bar parts 8 may be clamped on the supporting bar 5 in the form shown in Fig. 5. That part of the recess 4 of the sinker head under part 2 which is not filled by the auxiliary presser bar part 8 is closed by additional parts 9 which are detachably secured for example bolted to one of the plate head parts I and 2 in any known manner. For this purpose there will also be kept in stock a set of additional parts of graded widths so as to correspond to all requirements.

In Fig. 5, the presser bar 5 is shown slidable in the direction off'the sinkers 3 on the top of the upper part I of the sinker head. The bar 5 carries the movable presser bar parts 8' (Fig. 7) which are clamped between the part I and the clamping bar ii, the presser bar parts 8 being inserted in a corresponding groove machined on the upper side bf the bar 5. These separate pa; ts 8' are an alternative to the integral parts 5,16, l of Fig. 1, and 1. 8 of Fig. 3. I

vAt the two ends of .the bar 5 are attached holder plates l2, l3 carrying pivot rods H, I! extending in the longitudinal direction of the bar 5. These pivot rods are engaged by levers I 61/ l 1 pivoted intermediately on "a fulcrum l8 carried by a bracket l9 fixed to the lower head member 2. The lower ends of the levers I6, I! are jointed by pins 2] to the ends of drive links, not shown. In connection with lever l1 of Fig.

limits whereby according to the ,and filling portions of 9 any suitable cam and intermediate members may be employed to operate said lever.

The retractable middle presser bar parts enable the middle part of the needle bed to be excluded from the stitch forming operation without it being necessary for this purpose to subdivide the needle bar. This fact is of particular importance when, for example, the middle part of stockings is to be excluded from the stitch forming operation-during the formation of the heel flaps and to be brought in the known manner under the knocking-over comb for preserving the stitches last formed, while the knocking-over comb at the corresponding points is to be made shorter than at the other points. When this method is carried out according to the known proposals, the heel angle has a shape differing somewhat from the normal as it has to be provided with a longer slot than is necessary for the production of the heel flaps. This can be avoided when the needle bar is of undivided construction and the middle press part is arranged to be retractable. It is, therefore, of particular importance when the knocking-over notchedcombs within reach of the retractable presser parts are made shorter than the non-adjustable press parts. This is shown in Fig. 9. The reference character I II in Figs. 1, 8, and 9 indicates an auxiliary bar which serves the purpose of securing the elements 8' to the bar 5.

It is also possible as shown in Fig. 8 to arrange the presser bar for retrograde movement -over its entire width and to arrange its drive in such manner that it is always advanced into the operative position directly before the press operation and thus renders unnecessary the rocking movement of the needle bar which is now usual. In this connection it is of particular advantage that the sinker head need not partake of the movements of the presser bar.

I claim:

1. In a machine for knitting flat hosiery, a sinker, bar head, and a movable presser bar guide'd on the upper side of the sinker bar head and extending from the upper side thereof downwardly in front of said head.

2. In a machine for knitting fiat hosiery, a sinker bar head having upper and lower members, a retractable presser, bar: guided on the upper member of the sinker bar head, presser bar parts integral with said bar and extending downwardly into a recess in the lower member of the head, exchangeable auxiliary presser parts at both sides of the integral presser bar parts and also extending into the recess, and stationary presser bar parts fixed to the sinker bar head said recess not occupied by the retractable presser bar parts.

3. In a machine for knitting flat hosiery, a sinker bar head, a. presser bar having retractable parts guided on the upper side of the sinker bar head and extending from. said upper side down-- the fixed parts.

ANTON located below the retract-

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