US2877016A - Printing presses - Google Patents

Description

4 March 10, 1959 J. s. CHILTON PRINTING PRESSES 6 Sheets-Sheet 1 Filed June 2. 1954 Joseph .SiC fii/lan INVENTOR.

BY M' M"):

March 10, 1959 J. 5. CHILTON 'PRINTING PRESSES 6 Sheets-Sheet 2 Filed June 2, 1954 w m m "M m mm E a M m %M w M N R m g x k \v mu: 5 Q 92 \m\ w 5 fir; E (Q a. 4 a. v Q E w mt March 10, 1959 J. s. CHILTON 2,377,016

PRINTING PRESSES Filed June 2. 1954 e Sheets-Sheet 3 INVENTOR. By @Mm Joseph. .5. Chi/fan F mm km a $2 av n W March 10, 1959 .1. s. CHILTON PRINTING PRES-SE3 6 Sheets-Sheet 4 Filed June 2, 1954 Joseph .S'. Chi/fan INVENTOR.

March 1959 J. s. CHILTON PRINTING PRESSES '6 Sheets-Sheet 5 Filed June 2, 1954 Joseph 5. Chi/fan INVENTOR.

9 BY wvmm March 10, 1959 J. s. CHILTON PRINTING PRESSES e Sheets-sheaf. e

Filed June 2, 1954 Joseph 5. Chi/fan INVENTOR WM Z9 United Stat s P te a m-gore, nse na sas J o seph s Chilton Lamar, Colo. Applicationlune 27,1954, Serial No. geese;

' 1 Claim- (sme l-22.

My-v inventionv relates to: improvements, in printing presses of the impression cylinder and reeiprocjating'itype bsd l s V Thetprimary object of -my invention is to provide in a printing press having a type. bed. mounted to reciprocate forwardly and rearwardly through printing/arid 'idle strokes .andtnovelmeans for raisingand loweringfthe bed atQtheH end of its strokes-into and.fromiprinting'position.

' Another object is to provide in such, a pressa single belt drive) operatively connecting theimpression' cylinder directlyio .thebedto reciprocate the bed uponrotationfof thetcylinder in opposite di rections. i i i Still' another object is, to provide. in such a press imp d eet f in ea s o era ed b to e n impression cylinder accurately and obviating "suctiohrsheet pick updevices.

stillz'another object-isto provide improved. simply constructed inking means readily removable so thattlie. press mayy-be used with a: stencil sheet; as a duplicating ress.

Still; another objectis to simplify such machinesv and reduce-the, cost offlmanufacturing and servicingthes'ainje,

Otherand subordinate objects together withthe 'pr'elciseenature, of my improvements will become readily apparent when the following description and claim are read w r r nc t the draw n s PEQ P HY I d forming part ofthisspecification,

In said drawings;

Figure 1 is, a iew in side elevation of my. improved press in the; preferred; embodiment and illustratiiig'the parts positioned for a forward prm agfsrragee the yp bc y, a

Figure 2; isa view in plan of the same partly broken awayy yanddrawn toa,large riscale} Figure3 is a view in vertical longitudinal section taken on the line 3 -3 of Figure 2 and drawn to the. same. scale gu e. v 4 r. H. l a

Figure; is a view in vertical longitudinal section illuse t n he ma er in w i h the mi i n"' y i i r' n re ede pe a n P n in i l Figure 5 is an enlarged 16W n vertical longitudinal section showing the position of the airswhenrhejtype bed has moved into its forward limit of movement, parts beinebroken aw y;

Figure 6 is an enlarged view in longitudinal section partly broken away and illustrating the manner.v in which the. printed sheets are discharged and stacked; 4

Figure 7' is an enlarged view in vertical transverse seetion taken on the line 77 of Figure 3;

Figure 8 is an enlarged exploded view in perspective of the inking means and the operating roller for 'a sheet grip on the impression roller;

Figure 9 is an enlarged view in perspective of the type ke lsen e s W Figure .0 enlar view in es c v 9 the ice 2 Figure. 12,is, an enlarged view in perspective of the type a n a Figure 13,is an enlarged view in perspective of a sheet releasing, device forming" part of the "sheet feeding me" l H 7 "Figure 14 is an enlarged view in transverse section taken on the Enem -5140f Figure 13.

Referring now to the drawings, by numerals the press army inventioncomprises an' oblong horizontal base]. hollow to reduce weight! An upwardly opening'elon g'ated channel member 3. surmounts thebase 1 parallel th re: with'and'for'ms arunway for a type bed and carriage presently described. Inverted transverse su porting channel bars'lS, 7 at opposite sideis of thetransversecentei of ls'aidflch'annel member3 are suitably fixedthereto under, thsameu a a r a "Pairs" of coil springs 9, 11 at opposite sides of said channel member 3 interposed between the bottoms ofS-aid bars15, Tand the base l yieldingly support said channel members 5, may. Nut equippedfbolts 13; 15"are "suit ably'fik'ed in the bottom'17 of thebhann'el member 3 and bars 5,' 7 and slidably extend into the basel said bolts depending through the ch'annelbars 5, 7 and springs 9,11 and stabilizing said channel member against horizontal movement. "The springs 9, 11 yieldingly support the channel member 3 for a particularpurpose presently n r a a p An impressioncylinder 19, suitably fixed on an axial shaft 21 extends transverely. of and above the channel member 3 in the transverse center'thereofl The impre's sion"cylinde"r"19' is rot'atably mounted'between' a pair of braclgetsfzdbolted, asat' 25, to and upstanding from the base at 615positesidesjai1d in the transverse center thereof and. in which oppositeends of the cylinder shaft 21f'ar suitably "journaledf The impression cylinder is'suitably resiliently faced as at 27 in anyjusu'al manner. A hand crank 29 is provided on one end of the shaft 21 for rotat} ing the same to rotate saidcylinder 19. i

An oblong rectangular type bed 31 is mounted in the channel member, 3 on a roller carriage '33 for end wise reciprocation with said carriage longitudinally of said member. 3bene'ath the impression cylinder 19 forwarc lly andrearwardly through printing and idle strokes respectively. 'As will be manifest printing is efiected bytypej35 in a conventional chase 37 suitably fixed on said bed'3'1 for coaction of the type and impression'cylinder during the forward printing stroke offthe type bed 31. Side guide rollers 39 on th type bed 31 engaging the sides 41 of'thfe channel member 3 prevent lateralplay of said bed 31, i

The carriage 33 is of rectangular skeleton form with diagonal cross braces 43 extending between thefsides 45 thereof and is supported at its ends on the bottom 17 of the channel member 3 by a pair of transverse front and rearrollers '47 rotatablef'on a pair of front and rear aide shaft d9thefopposi te ends of which are suitably fixedin the sides 45 of carriage 33 and extend outwardly beyond said carriage for a purpose presently seen. A pair of front and rear transverse resilient bumper bars 51, 53in opposite'. 'ends of the channel member. 3, limit forward and return strokes of thecarriage 33;

The typehed 31 is mounted for limited overthrow molfimept lendwise on the carriage forwardly "and rearwa'rrlly r elati ve thereto when said'carriage'reaches the limits of 'it's" forward'and rearward strokes. For this purpose a 'p aii-"of longitudinal bottom side bars 55 on thetype bed are provided which straddle the carriage and are supported on the ends of thie'aiile shafts 49,. Front n rear pan-g opposite elongatedfbott'om, cam

newness; 63in saidbarss traddlthe endsof'the aide shafts 49. The"-ca'in 'nbrehes" 61; '63 are provided with cam bottoms 6 5, 67"incli'r1d from the horizontal so that Patented-.- 19,1252

upon forward overthrow movement of the type bed 31 it will be lowered for a return idle stroke and upon rearward overthrow movement of said bed 31 it will be raised for a forward printing stroke. a

The impression cylinder 19 is operatively connected to the type bed 31 by means of a cable 71 wound intermediate its ends on one end of said cylinder 19, as best shown in Figures 1 and 2, and extending oppositely from beneath said cylinder with opposite ends 73, 75 attached to the front and rear ends 65, 67 of said bed 31 by shackles 77, 79 adjustable in upstanding front and rear end ears 81, 83 on said bed. As will be seen the notches 61, 63 and axle shafts 49 provide lost motion driving connections between the type bed 31 and carriage 33.

The inking means is disposed at the rear of the impression cylinder 19 and comprises a cradle 85 including a pair of side cheek plates 87 pivoted on a front cross shaft 89 removably supported at its ends in the bearing brackets 23 so that said cradle 85 is disposed above the type bed 31 and type 35 to rock vertically. An inking roller 91 extending transversely of the type bed 31 above the type 35 is fastened on an axial shaft 93 journaled in the cheek plates 87 so that said roller may roll along the type 35. A pair of idler wheels 95 loose on the shaft 93 roll on the type bed 31 at opposite sides thereof and support the inking roller 91 in proper position to ink said type 35, said idler wheels 95 also supporting the cradle 57 against downward swinging during reciprocation of the type bed 31. The inking roller 91 is driven in the direction of rotation of the impression cylinder 19 by a belt 97 engaged with the cylinder 19 at the end thereof opposite the cable 71 and operating a pulley 99 fastened on one end of shaft 93.

An ink applying idler roller 101 extends along the top of the inking roller 91 and is adapted to be coated with ink manually by any suitable means. The ink applying roller 101 is hollow with end plugs 103 fixed thereon by set screws 105 and is endwise slidable on an axial shaft 107 having reduced squared ends 109 vertically slidable in upright forks 111 on cheek plates 87 so that said roller 101, under the influence of gravity frictionally rides and is rotated by the inking roller 91. Means are provided for reciprocating said roller 101 endwise along the inking roller 91 to facilitate the ink applying operation comprising a cylindrical core 113 in said roller 101 fixed by a set screw 115 to the shaft 107 and having cam ends 117 coacting upon rotation of said roller 101 with cam faces 119 on the plugs 103 to reciprocate said roller 101.

A pair of double hooks 121 suspended from a cross shaft 123 cross connecting said brackets 23 in the rear of the rollers 91, 95 are engageable with a cross shaft 125 rigidly connecting the cheek plates 87 at rear ends of said plates, the arrangement being such that said hooks 121 are engageable with said shaft 125 to latch the cradle 85 in upswung position with the inking roller 95 raised into ineffective position, or said hooks may be engaged with said shaft 125 to hold the cradle 87 in downswung position as shown in the drawings so that the weight of the cradle 87 will be taken ofi the wheels 95 during the inking operation.

The sheet feed means, designated generally by the numeral 129, comprises a rectangular tray 131 mounted above the ink applying roller 101 and in front of the impression cylinder 19 in downwardly and forwardly inclined position for gravity feed of sheets from a stack 133 therein. The tray 131 is mounted by means of an inverted U-shaped standard 135 rising from the bearing brackets 23 with a cross bar 137 supporting the lower end 139 of the tray. The stack 133 rests on the lower front end 139 of the tray.

A false bottom panel 143 in said tray 131 is spring 4 and lip so that the top sheet of the stack 133 must be lifted upwardly and released from beneath said lip 145 to release the same for feeding downwardly out of said tray 131.

Coil springs 147 between the false bottom panel 143 and the bottom 149 of tray 131 urge said panel 143 at its lower end toward said lip 145 into clamping position.

, The coil springs 147 are sleeved on rearwardly extending ten'sioned at its front lower end toward an internal front,

guide pins 151 on said panel 143 slidably extended through the bottom of the tray 131.

A sheet guiding flange 153 inclinesdownwardly and forwardly from the lip between the ink applying roller 101 and the impression roller 19 to guide the released sheets to a sheet grip 155 on the impression cylinder 19 and presently described.

Sheet releasing means is provided comprising the fol lowing. A sheet releasing blade 157 of rubber or the like extending transversely over the front of the tray 131 is mounted for revolving into engagement with the top sheet of the stack 133.

The mounting for the blade 157 comprises a transverse shaft 159 at the front of the tray 131 journaled at its ends in bearing brackets 161 on the standard 135, a pair of collars 163 fixed by set screws 165 on said shaft 159 adjacent opposite ends thereof, and an elongated clip bar 167 straddling and detachably gripping a rounded longitudinally flanged rear edge 169 of said blade 157 and pivoted at its ends on lateral pins 171 on said collars. A one to one ratio sprocket and chain drive 173 between one end of shafts 21, 159 provides for rotating said shaft 159 to revolve said blade 157 in accordance with the direction of rotation of the impression cylinder 19 similarly.

A stop arm 175 on the blade 157 engages the shaft 159 when said blade 157 is revolved in one direction, i. e. counterclockwise as viewed in Figures 1, 3, 4, 5 and 6 and prevents said blade 157 from swinging counterclockwise on the pins 171 and thereby maintains said blade momentarily in position to frictionally engage and slide the top sheet of the stack upwardly against the rear upper end 177 of tray 131 to buckle the sheet, release the same from under lip 145 and then disengage the sheet for gravity feed thereof, as shown in Figure 6. When the blade 157 is revolved clockwise, the blade 157 swings idly against the top sheet of the stack.

The sheet grip 155 comprises a longitudinally extending clip bar 156 on the impression cylinder 19 forming therewith a clip and pivoted at its ends on said cylinder, as at 179, for swinging of one edge away from said cylinder into clip opening sheet releasing position. Springs, as at 181 on said pivots 179 interposed between said clip bar and cylinder 19 normally yieldingly hold said clip bar 156 in clip closing position with said edge of said bar 156 in sheet gripping relation to said cylinder 19. A clip ba'r pivoting and opening idler roller 183 on the beforementioned shaft 89 engages and pivots said clip bar 156 into clip opening position as said grip 155 is revolved by the impression cylinder 19 into a position directly below theflange 153.

A pair of upper and a lower sheet discharge rollers 185,v 187 extend in front of and parallel with the impression cylinder 19 for stripping printed sheets from said cylinderand discharging the same onto a table 189 suitably mounted on member 3 above the type bed 31. The lower discharge roller 187 is journaled at its ends in the bearing brackets 23, and is driven by the before-mentioned belt 97 which is operatively connected to one end thereof as best shown in Figure 2. The upper discharge rollers are journaled in a pair of arms 193 pivoted on a cross shaft 191 on the brackets 23 so that said roller 185 en gages the roller 187 by gravity.

A pair of sheet guides 195 on the arms 193 curve upwardly in front of the impression cylinder 19.

A suitable transverse sheet, aligning stopbar 197 is. provided on the table 189. p

In operating my improved press, the impression cylinder 19 is rotated counterclockwise as indicated by the broken line arrow in Figures 1 and 3 to position the parts in starting position. Such rotation of the impression cylinder 19 causes winding and unwinding of the cable 71 on said cylinder so that end 73 of the cable pulls the type bed 31 into the limit of its rearward idle stroke, as shown in Figure 3. In its rearward stroke the type bed 31 pulls the carriage 33 rearwardly against the rear bumper bar 53 before said bed assumes its limit of rearward idle movement, and said bed 31 then moves through an overremoving shaft 89, a stencil sheet not shown may 'be used on said bed and the press converted into a duplicating machine.

The foregoing will sufiice to impart a clear understanding of my invention.

operated so that the clip opens upwardly.

Rotation of the impression cylinder 10 counterclockwise as described in the preceding paragraph causes the sprocket and chain drive 173 to revolve the sheet releasing blade 157 of the sheet feeding means counterclockwise as represented by the broken line arrow in Figure 3 to release and disengage the top sheet 154 of the stack 133 for gravity feed of said sheet to lodge its leading edge in said grip 155 as shown in Figure 3. During such rotation of the impression cylinder 19 the inking roller 191 and lower sheet discharge roller 187 are driven idly by belt 97.

As will now be seen, in the described limit of rearward overthrow movement of the type bed 31 and the limit of rotation of the impression cylinder 19 counterclockwise the parts of the press are in starting position for printing. Now by rotation of the impression cylinder 19 clockwise as indicated by the full line arrow in Figure 3, the cable will pull the type bed into the limit of its forward printing stroke, said bed will pull the carriage 33 forwardly against the front 'bumper bar 51 and then move relative to carriage 33 through a phase of overthrow forward movement limited by coaction of notches 61, 63 with axle shafts 40, and said notches 61, 63 and axle shafts 49 will coact during such overthrow movement'of bed 31 to permit said bed to lower, all as shown in, Figure 5, so that said bed may move through its rearward return stroke idly as regards printing.

As the type bed 33 moves through its forward stroke the type is inked by the inking roller 91 as shown in Figure 6 at the start of clockwise rotation of impression cylinder 19. The sheet grip 155 is revolved from engagement with roller 183 and closes to clamp the leading edge of the sheet to said cylinder 19 so that the sheet is pulled under and around said cylinder forwardly at the same speed as that at which the type bed 33 is pulled forwardly. Clockwise rotation of said cylinder is limited in the limit of overthrow movement of said bed forwardly by the notches 61, 63 and .axle shafts 49 and cable 71. In the limit of clockwise rotation of said cylinder 19 the trailing edge ,of the printed sheet is above the sheet dis- I charge rollers 85, 87 so that upon rotation of said cylinder Manifestly the invention is susceptible of modification without departing from the inventive concept and right is herein reserved to such as fall within the scope of the invention as herein disclosed.

What is claimed as new is as follows:

In a printing press sheet feeding mechanism, a rigidly mounted tray inclining downwardly and forwardly to an impression cylinder for containing a similarly inclined stack of sheets of paper for feeding of the sheets off the stack successively from the top of the stack by gravity to an impression cylinder, means for clamping the lower ends of the sheets of a stack comprising a terminal lip on said tray for overlying the lower end of the stack, and a false spring loaded bottom in said tray for supporting the stack of sheets of paper and coacting with said lip to releasably clamp the lower end of a stack of such sheets there between, a journalled shaft extending transversely over said tray for rotation in opposite directions respectively, means for rotating said shaft in opposite directions, a pair of collars spaced longitudinally of and fixed to said shaft for rotation in correspondence therewith, a pair of lateral studs on said collars for revolving in correspondence with rotation of the collars, a pair of clips swinga'bly mounted on said studs and revolved thereby, a resilient blade clamped in said clips for revolving thereby into wiping engagement with the sheets of the stack idly in one direction of revolution of said clips, and a pair of lateral stop arms on said clips engaging said shaft in the other direction of revolution of the clips to prevent swinging of the clips and cause the blade to frictionally grip and buckle the sheets successively upwardly to release the sheets successively.

References Cited in the file of this patent UNITED STATES PATENTS 324,253 Hawkins Aug. 11, 1885 387,582 Davis Aug. 7, 1888 432,518 Dodge 1 July 22, 1890 456,234 Fairfield July 21, 1891 528,830 Vierengel Nov. 6, 1894 602,406 Murray Apr. 12, 1898 756,432 Todd Apr. 5, 1904 883,853 Barnett Apr. 7, 1908 1,196,361 Howell Aug. 29, 1916 1,447,388 Kalmanovitch Mar. 6, 1923 1,965,827 Duncan July 10, 1934 2,093,384 St'orck et a1 Sept. 14, 1937 2,165,232 Curtis July 11, 1939 2,189,073 Levine Feb. 6, 1940 2,569,692 Rockwell Oct. 2, 1951 2,581,687 McWhorter Jan. 8, 1952

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