US2195319A - Web-turner bar for printing machines and for like purposes - Google Patents

Description

March 26, 1940. E. R. SUTCLIFFE WEB-TURNER BAR FOR PRINTING MACHINES AND FOR LIKE PURPbSES Fild July 16; 1938 Fig.1

Patented Mar. 26, 1940 WEB-TURNER BAR FOR PRINTING MA OHINES AND FOR LIKE PURPOSES Edgar Rouse Sutclifie, Lowton, 'Newton-le-Willows, England Application July 1 1938, SerialNo. 2195507 3 In Great Britain September 25, 1936 This invention relates to turner bars applicable to Web printing machines and to other like purposes. v I

The invention has among itsobjects to avoid 5 friction in the passage of the webs over the turner bars and to prevent set-oil or smearing of theimpressed webs.

According to the invention the turner bar comprises a circumferential series of longitudinal bars of substantiallysector-shaped-section each radially immovablerelatively to .a central ,spindle carrying them but capable of axial movement relatively to the said spindle] in opposite directions'under the influence of the web.- 7

According to the invention furthermore, each diametrically oppositely disposed pair of longitudinal b'a'rs is automatically operated under the influence of the web by a pair of racks and co:

operating pinions, the racks being secured to or formed integral withfthe bars and each pair of diametrically oppositely disposed bars engagin'g atopposite positions with a' toothed pinion mounted within a recessor cavity in the central spindle around -which the bars, are mounted whereby anaxial movement of one bar under the influence of the moving web in peripheral contact therewith is effective to move the other diametrically oppositely disposed bar axially in the opposite direction. 39 Theinvention is illustrated by way of example in the accompanying diagrammatic drawing, in which a 1 f V Figure 1 is a sectional side elevation .of part of a construction of turner bar according tothe invention. v o A Figure 2 is a part sectional elevation of another part of the construction according to Figure 1. Figure 3 isa sectional elevation of a detail of the construction illustrated in Figures 1 and 2 40 on an enlarged 'scale. j

Figure 4 is'a transverse sectional end elevation corresponding to Figure 3.'

'Figure 5 is a transverse sectional elevation on the line l9--l9 of Figure l and Figure 6 is a transverse sectionalelevation on the line, 20-40 of Figure 2.

In carrying the invention into effect according to one construction as illustrated in the drawing the turner bar comprises circumferential seriesfor example ten--of longitudinal bars a of substantially segmental section that are mounted lengthwise injuxtaposition around a central spindle c to present a substantially continuous peripheral surface around which the web is passed,

the bars a being immovable radially but movable face as racks m which engage at opposite posisector-shaped' bars a and axial grooves d f axially independently one ofthe other.

as the web moves and changes its direction in movement around'the turner barthe longitudinal -hars in contact with the web at their respective peripheral faces participate in the axial component of the motion of the web during its pev riodof contact with the turner bar. Each pair of diametrically oppositely disposed sector sha'ped bars a are mechanically intereng'aged in such a manner that an axial movement of one bar in; 0 one direction serves to efiect an axial movement I inthe opposite direction of the other bar. Thus, 7

the "sector-shaped bars a may-be formed for a determined distance along the inner peripheral tions toothed pinions such as n which are mounted on spindles n in recesses 0 conveniently provided in the centralspindle c, the teeth of the pinions n? projecting beyond the periphery of the spindle c on either side to engage the 20 racks m As shown in Figure 1, the oppositely disposed racks m engage the pinions 11 with the one bar at the limit of its axial movement in one direction and the diametrically oppositely disposed bar at the limit'of its movement in the other. I

Axia grooves or balliraces f, o are provid betwe'enjthe Central pindle c and the longitudina1 between "the longitudinal sector-shaped bars and the sockets d at theends of the spindle for the reception of the balls or rollers for the purpose of securing the minimum friction in the movement of the longitudinal bars. o In order to reduce friction, at an intermediate position or at intermediate positions distant from the socket end'of the spindle 0 maybe provided rollers 10 (Figure 5) mounted on ball hearings on spindles p which are mounted within re- 40 cesses or cavities 11 (Figure 2) formed in the central spindle c in such manner that the rollers project at opposite positions from the recesses or cavities so as rota'tably to engage the inner peripheral surfaces of ,the sector-shaped bars a. 5

the sector-shaped bars in their axial reciproca- 5 it end of their axial movement tion nibs q may be resiliently mounted under the pressure of springs q in recesses or cavities q formed on the inner end faces or end plates to move axially a corresponding distance in the opposite direction without additional or external means being required for restoringthe bars to their original positions.

I claim:

1. A turner bar including in combination a central spindle, sockets at each end of said spindle,

a turner bar supporting-frame carrying said sockets, friction bearings between said spindle and said sockets, longitudinal bars mounted on said spindle to present outer peripheral surfaces for frictional engagement by the web and movable thereby, and friction bearings between said spindle and said bars. 1

i 2. A turner bar including in combination a central spindle, a circumferential series of Iongitudinal bars mounted on said spindle to present outer peripheral surfaces for frictional engagement by the web, each of said bars being capable of a longitudinal movement relatively to said spindle under the axial component of motion'of the web and means causing positive engagement of each of said bars with the diametrically oppositely disposed bar in such manner that the longitudinal movement of onebar in one direction causes longitudinal movement of the diametrically oppositelydisposed bar in the opposite direction. i

3. A turner bar including in combination a central spindle, a circumferential series of longitudinal bars mounted on said spindle to present outer peripheral surfaces for frictional engagement by the web, each of said bars being radially immovable relatively to'the central spindle but capable of a longitudinal movement relatively to said spindle, a. rack formed for a determined length on the inner peripheral surface of each bar and toothed pinions mounted in recesses or cavities in said spindle and engaging the racks on diametrically oppositely disposed bars at determined positions in such manner that the longitudinal movement of one bar under the influence of the web serves to impart a longitudinal movement thereto which is effective to return the diametrically oppositely disposed bar into its original position. l

4. A turner bar including in combination a central spindle, a circumferential series of longitudinal bars mounted on said spindle to present outer peripheral surfaces for frictional engagement by the web, each of said bars being ca-' pable under the influence of the web of a longitudinal movement relatively to said spindle in opposite directions and friction bearings at an intermediate positionor positions with respect to the ends of the bar between the spindle and the bars.

5. A turner bar including in combination a central spindle, a circumferential series of longitudinal bars mounted on said spindle to present outer peripheral surfaces for frictional engage:- ment by the web, each of said bars being capable under the influence of the web of a longitudinal movement relatively to said spindle in opposite directions and cushioning or buffer means for said bars mounted at the ends of the turner bar. 6. A turner bar of circular section comprising a central spindle, a series of longitudinal bars surrounding said spindle to present an outer peripheral surface which is adaptedto be frictionally engaged by the web, gear teeth on the under surface of each of said longitudinal bars,.and gear wheels mounted in said spindle, each gear wheel engaging the teeth on each pair of diametrically oppositely disposed longitudinal bars. 7. A turner bar of circular section comprising a central spindle, a series of longitudinal bars surrounding said spindle to present an outer peripheral surface which is adapted to be frictionally engaged by the web and means connecting each pair of diametrically oppositely disposed bars whereby a. longitudinal movement of one bar in one direction under the axial, component of motion of the web serves simultaneously to cause a longitudinal movement of the diametrically oppositely disposed harm the opposite direction. v

EDGAR ROUSE SUTCL'IFFE.

Images