US1924288A

US1924288A - Printing press

Info

Publication number: US1924288A
Application number: US669392A
Authority: US
Inventors: Harvey J Reardon
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-05-04
Filing date: 1933-05-04
Publication date: 1933-08-29
Anticipated expiration: 1950-08-29

Description

Aug. 29, 193s. H. J. REARDON 1,924,288

PRINTING PREss ,l

Fild may 4,v 193s :s sheets-sheet 1 ATTORNEY Aug. 29, 1933i H. J. REARDON PRINTING PRESS Filed nay. 4. 1935 s sheets-snaai 2 I ATTORNEY Aug. 29, 1933. H. J. REARboN PRINTING PRESS Filed May 4, 1935 3 Sheets-Sheet 5 INVENTOR BY @lim/W Q y ATTORNEY Patented Aug. 29, 1933 UNITED STATES lPATlazNT oFFicE PRINTING PRESS n Harvey J. Reardon, Chicago, Ill.

Application May 4, 1933. Serial No. 669,392

22 Claims.

l This invention relates to certain novel improvements in printing presses.

Objects of this invention are: to provide a hand printing press that is particularly adapted for the use of school children and others unskilled in in a printing press, the combination of:` a bed having parallel trackways; each of the trackways carriage movable along the trackways and including an impression roller; said carriage in- A cluding vertical anti-friction elements or rollers movable over the trackways in engagement with thesaid horizontal walls thereof; and said carriage including horizontal rollers or anti-friction elements movable over the trackways in engagement with the said vertical walls thereof to prevent lateral, shifting movement of the carriage and impression roller during the printing operation.

An additional object of the invention is to provide in a. printing press, the combination recited in the last-named object plus a chase arranged on the bed of the press and a form of type assembled therein having their printing faces projecting slightly above the Alowest point of the impression roller when the vertical rollers of the carriage are in engagement with the horizontal walls of the trackways so that the impression roller is forced to climb slightly up onto the printing faces of the type as it passes thereover; whereby the impression roller rides with its own .printing faces of the type during the printing operation; the impression roller thereby accommodating itself and the paper thereunder, in a manner more fully explained hereinafter, to any little irregularities that may exist between the vertical heights of the several type in the chase prior to the start of the printing operation. This eliminates the necessity for planing and proving up the type and is an important feature of the new press.

A further object of the invention is to provide a novel combination of: means for locatingl a chase upon the bed; and means for locating paper sheets successively upon the chase, in printing position; said means including a slidable work- -locating bar guided for movement over the bed;

Another object of the invention is to provide including a horizontal wall and a vertical wall; a

weight and the weight of its carriage upon thev (Cl. lol- 269) and said means including a paper clamping member pivotally mounted on the said slidable worklocating bar for`slidable movement therewith to accommodate itself to sheets of paper of different sizes, according to the size ofthe chase engaged by the slidable work-,locating bar.

vAnother object of the invention is to provide, in combination, a hand printing press and a chase for printing from rubber type, unmounted rubber and linoleum cuts, rubber map vprinting forms or mats and the like; and in the use of which the necessity for planing and proving up the type assembled in the chase is eliminated.

A still further object of the invention is to provide a hand printing press that is especially designed for usel with the chase described and claimed in my co-pending application, Ser. No. 669,083, led May 3, 1933. y

Still another object of the invention is to provide a novel arrangement of means for successively locating the corners of paper sheets in printing position upon the chase; said means including corner-locating pieces attached to and lslidable with the aforementioned slidable Worklocating bar and paper clamping member carried thereby.

A s'till further object of the invention is to provide a press that is so constructed that as many as ten good clear copies may be printed after each inking operation; the later copies being obtained by applying downward pressure upon the impression roller carriage to urge the impression roller into engagement with the type, or the like, in the chase.

Additional objects of the invention are: to provide the hand printing press hereinafter described and claimed; and to provide a press that is generallyefcient in use, and relatively simple and inexpensive in construction.

Other objects will appear vhereinafter as the description proceeds.

In the drawings:

Fig. 1 is a perspective View of a preferred form of the new printing press showingthe chase assembled on the bed plate thereof in printing position;

Fig. 2 is a longitudinal sectional view on line 2--2 in Fig. 1;

Fig. 3 is a fragmentary end elevational view, on line 3-3 in Fig. 1, showing how the impression roller rides with its own Weightand the weight of its carriage upon the rubber type during the printing operation, causing the vertical rollers of the impression roller carriage to ride up slightly olf the horizontal walls of their trackways;

6, also illustrating the parts referred te inthe description of Fig. 6;

Fig. 8 is a perspective view of the chase showing rubber type andlocking bars arranged therein; and

Fig. 9 is a perspective view showing arubber map printing` form vor mat which may be arranged in the rubber chase shown in the lower half of the figure and used inthe press for printing or reproducing geographical maps and the like.

A preferred form Lof the new printing press is illustrated in the drawings and the same includes a bed 10, chase 11, and impression roller car- The bed 10 is preferablyfand most economically, made by forming the same from a single plate or sheet of light metal, `for which an aluminum alloy is preferred. This is, however, not to be considered in any way a limitation upon` the selection of material used in making the bed 10, or the manner of forming the same.

'Formed in the bed plate 10 along the longitudinal edges thereof are parallel track'ways 13. Each of these trackways includes a horizontal Y Wall 14 and a vertical Wall 15 so that the top or upper surface 16 of the bed plate, upon which the chase 11 lies, is disposed somewhat above the horizontal walls 14 of the trackways 13. l

Movable over the trackways 13, in engagement with the horizontal walls 14 thereof, are vertical rollers or anti-friction elements 18, which are carried by the frame 17 of the impression roller carriage 12. Also carried by the frame 17 of the carriage 12 and movable over the trackways 13, but in engagement with the vertical walls 15 thereof, are horizontal guiding rollers oranti friction elements 19. The frame 17- of .the carriage '12 includes a handlel 22, and a shaft 20 has its ends or trunnions rotatably journaled in the frame 17. Also ya part of the carriage 12 and mounted on the shaft 20 "is an impression roller 21 which is preferably made of relatively .yieldable, so-called hard rubber, for reasons to appear hereinafter. This impression roller may,

5 however, be made of wood, metal, or other equiv- Fig. 4 is a vertical sectional view on line '4-4 rof the paper-clamping member 33 for slidable ing pieces 24 (Fig. 6) for locating one end of thel chase in printing position on the upper surface 16 of the bed plate. This chase may be either the metal chase 11 of Fig. 8 or the rubber. tray or. chase 25 of Fig. 9.

""' Slidably mounted on the upper surface 1 6 vof 5 the bed plate for locating the other end of the work (that is, one end of either the-chase .11 or the chase 25) is a slidable work-locating bar 26 which has corner locating pieces 27 (Fig. 6) attached thereto.l The'slidable work-locating bar 7'0 '26 is guided over the upper surface 16 of the bed 30 on their upper ends and these nuts 3() project `which is angled under the work-locating bar 26.

'bled in the chase, including'the wedges or quoins reason to be explained hereinafter.

above the upper surface 16 of the bed plate 10 for movement thereover with the work-locating bar 26.

. To hold an impression-receiving sheet, such as a sheet of paper 31, in printing position upon the type 48 assembled in the chase 11 a pair of paper-clamping members or

clips

32 and 33 are provided. The clamp or clip 32 is pivotally mounted on a shaft 34 (Fig. 2). The shaft 34-is in turn mounted in a bracket 35 that is'xed to the upper surface 16 of the bed plate 10. The clamp or clip 32 has an angled end or lip 36 and this lip 36 urged downwardly into clamping engage-4 ment againstI the top of the Work-locating bar 23 'by means of aat, leaf spring 37. This spring' 37 is attached to the bottom side of the clamp or clip 32 and has an angled portion 38 that bears on the top surface 16 of the bed plate 10.r

The paper-clamping member or clip 33, instead of being xed relative to the bed plate 10, as is the clamp 32, is slidable over the bed plate 10 with the work-locating bar 26. To this Iend the clamp 33 is pivotally mounted on a shaft 4() which is carried by a slidable supporting frame or plate 39. This plate 39 has an end portion` 41 (Fig. 2)

yof the bar 26, so that the bar 26 is in effect mounted on, and carried by, the angled end portion 41 movement therewith over the upper surface 16 of the bed plate 10.

The paperclamping member 33 has an angled lip 42 at its inner endand this lip 42 is lurged into engagement with the upper surface of the fixed work-locating bar 26 by means of a flat, leaf spring 44. The leaf spring 44 is attached to the under side of the clip 33 and has anr angled portion 44 bearing on the base 39 (Fig. 2)` to urge the clamp 33 clockwise (Fig. 2) on its shaft 40.

'Ihe case 11 (Fig-8) has a flat base `46 and a marginal flange 45 formed integrally therewith.

flange provides a channelway or groove that extends around the edges of the base 46 and slidably receives the end portions'of the locking bars 47 (Fig. 4) that are slidably mounted on l the base 46:. These locking bars 47 cooperate with the other elements of the lock-up means assem- 49 (Fig. 1), and suitable furniture assembled in the chase, vto lock up the form of flat, shallow, L rubber type 48, either alone or with an unmounted rubber or linoleum printing out, as more fully set forth in my aforementioned co-pen'ding appli- 130 cation.

point that the impression-roller 21 assumes when 135 the vvertical rollers 18 are in engagement with the horizontal walls 14 of the trackways 13, for a An inlet 50 is provided in the flange'45 at one,

corner of the'chase 11 for slidably inserting the 14() `ber type 48 and/or any unmounted rubber or linoleum printing cuts assembled therewith, a rubber printing form or mat 51 (Fig. 9) may besubstituted. The rubber lprinting form or mat shown is thin and flexible, is designed for printing geographical maps, and has a raisedoutline map formed thereon.

In using the printing form, or mat 51, the same is assembled in the tray or chase 25. This tray l This edge 52 is of the same size as the printing form or mat 51 so that the latter may be fitted onto the base 53 within the raised edge 52 and held by the edge 52 against shifting on vthe base 53. The tray 25 and the form 51 assembled therein are placed in printing position upon the upper surface 16 of the bed plate 10. The base 53 of the tray 25l then serves as a mounting for the form l to raise the printing face of the printing form 51 up high enough to engage the impression roller 21.

Formed in the bed plate at the ends of the trackways 13 to prevent the carriage 12 from overrunning the trackways are stops 56.

Attached to, and projecting slightly above,`the

work-locating bars 26 and'23, respectively, (

Figs.A

1, 5, 6 and 7) are means in the form of angled corner-locating

pieces

54 and 55 which cooperate with the clamping

members

32 and 33 to register successive sheets of paper in printing position upon the chase 11 or tray 25.

' Operation To print with the new press from the chase 11, a form of flat, shallow, rubber type 48 and/or an unmounted rubber or linoleum cut,v (shown in vmy aforementioned co-pencling application), or

a combination of these, may be assembled in the chase 11 and locked therein by the 'lock-up means; which lock-up means includes the locking bars 47 and wedges ,49. The chase 11 is then Vplaced on the upper surface16 of the bed 10,

with one end of the chase 11 abutting the fixed work-locating bar 23 and fitting within the corner-locating pieces 24 (Fig. 1). The slidable work-locating bar 26 is then slid over the top -surface 16 of the bed plate, toward the bar 23,

and into engagement with the otherend of the chase' 11, so that the corners of the chase lie within the corner-locating pieces 24-27. The clamping nuts 30 .are then tightened down against the corner-locating pieces 27 tov clamp the work-locating bar 26 and the chase 11 in assembled, printing, position on the bed plate 10 of the press.

An inking roller or brayer (not shown) is then run over the printing faces 57 of the type 48,

and/or any unmounted ru'bber or linoleum cuts that may be assembled therewith in the chase 11. A sheet of paper 31 is then laid over the chase 11 above the printing faces 57 of the inked type 48 and/or any unmounted rubber or linoleum cuts (not shown)` locked therein; the corners of the papel` 31 being arranged in the corner-locating

pieces

54 and 55 that are attached to, and project slightly above, the work-locating bars -26 and 23, respectively, (Figs. 1, 5, 6, and 7). The

vthe corner-locating

pieces

54 and 55, whereupon the carriage 12 is 'again moved across the bed 10 to the right, Figs. 1 and 2. The second sheet 31 thus printedupon is thereupon removed and this cycle of operations completed; successive sheets 31 being thus laid and registered in printving position upon the chase so that successive copies of the form of type, type and cuts, or printing cuts alone, assembled in the chase may be printed therefrom by successively registering the sheets 31 in printing position upon the chase in the manner stated.` It is to be noted that it 'is necessary to clampdown only one end of the paper sheet 31, namely, the end away from which the carriage 12 isito travel during the printing operation.

As the carriage 12 moves over the chase 1l during the printing operation, the vertical rollers 18 of the carriage travel on the horizontal Walls 14 of the trackways 13 and the horizontal rollers 19 engage orf bear against the vertical Walls 15 of the trackways 13. As the carriage 12 and its impression roller 21 run over the chase 11, the impression roller 21 climbs slightly, over the paper 31, up onto the printing faces 57 of the rubber type 48, and, in so doing, the irnpression roller 21 lifts'the vertical rollers 18 of the carriage 12 slightly above and off the horizontal walls 14 of the trackways 13 (see Figs. 2, 3, and 4). The eect of this action of the impression roller 21 in climbing up onto the printing faces 57 of the rubber type 48 is that it causes the impression roller 21 to ride with its own weight and the weight of its carriage 12 upon the printing faces 57 of the rubber type 48 during the printing operation. During this time, however, the horizontal rollers 19 remain in engagement with the vertical walls 15 of the trackways 13 and cooperate therewith to prevent lateral or shifting movement of the impression 'roller y 21 and' its carriage 12 during the printing op- *f eration. This cooperation of the horizontal rollers 19 with the vertical walls 15 of thetrackways 13 to guide and prevent lateral or shifting movement of the impression roller 21 and its carriage 12, during the printing operation, is an important feature of the new press. This is because of the fact that the vertical rollers 18 do not at any time in the present apparatus function to guide the carriage 12 against lateral movement. This duty is performed by the horizontal rollers 11 both before and after the impression roller 21 climbs up onto the printing faces 57 of the type 48 and thereby lifts the vertical rollers 18 off the horizontal walls 14 of the trackimpression roller carriage 12 being disposed, at/ Ways 13 during the Printing Operation# It is t0 I 31-is thus registered and held in printing position be noted, therefore, that this arrangement of the trackways 13 and carriage 12 is unique in that the carriage may ride up off the horizontal walls of its trackways and still be guided by the vertical walls of the same against lateral movement. It is considered that this feature is new in the art.A N

The carriage 12 may also be operated with unmounted rubber or linoleum cuts assembled in the chase 11, either with or without the rubber type 48, and also when using a flexible rubber printing form or mat such as the map printing form 51, assembled in a tray, such as 25, on the bed plate 10.

As the impression roller 21 rides with its own weight and the weight of its carriage 12 upon the rubber type 48, during the printing operation, it compresses the rubber type 48 slightly and, in so doing, accommodates itself and-the paper 31 thereunder to any little irregularities or ydifferences in height that may exist between the printing faces 57 of the several rubber type 48, or between the printing faces of the type and the printing faces of any unmounted rubber or linoleum cuts that may be assembled therewith in the chase 11. This is 'an important feature of the new printing press since it is this feature of the press that eliminates the prior art practice and necessity for planing and proving up the printing faces of the heretofore customarily used metal type` to a common level prior to ,the printing operation. This result could not be effected, of course, with incompressible metal type and is considered new in the art. The following example will better explain how the present apparatus accomplishes this result of. eliminating the .necessity for planing and proving up the'typez/ Assume that there is avslight difference in vertical 31, since metal type are, of course, incompressi- A height between the printing faces 57 of the type P2 and R which form the first two -letters of the word Printer in the chase 1 (Fig. 1). If the type 48 were metal 'type this difference would necessitateplaning and proving up the type to a common height or else a poor reproduction or print would be formed on thel paper sheet ble. However, in the use of the present apparatus, including the compressible rubber type `48, as the impression roller 21 is run over the-chase during the printing operation it climbs slightly, in the manner hereinbefore described, up onto the printing faces 57 of the` tyr 48, whereupon the weight of the impression roller 21 and its carriage 12 compresses the higher of the two type P and R, referred to in this example, and in so doing brings the printing face 57 of the higher type down to a common levelwith the printing face of the lower type. Thus, they paper v31 is forced-into engagement with the inked printing faces 57 of both type and a good sharp, clear print or reproduction on the paper 31 is thus assured andthe prior art necessity for, and customary practice of, planing and proving up the metal type always heretofore used is thereby eliminated.

The best results have been obtained in the use of the present apparatus when using an impression roller 21 that is made of so-called hard rubber that has some yieldability.' This is because of the fact that Asome yyieldability in the impression roller 21 helps the impression roller better to accommodate itself during the printing operation to any little irregularities that may exist between the vertical heights of the printing faces 57 of the rubber type 48 assembled in the chase. However, the impression roller 21 may be made of Wood, metal, or other substance, and the present apparatus will still function satisfactorily.

The present apparatus is especially designed for the use of, and will nd its greatest use among, school children. Because of this fact, the elimination of the necessity for 4planing and proving up'the rubber type, and the consequent need for a proof table, mallets, and other apparatus `involved in the use of these printing forms, the

-pression Vroler 21 are vless than l (0.9l8) above the upper surface 16 of the bed 140 used in planing and proving up type, is a matter of considerable importance. This feature is especially important because of the fact that school children do not possess the skill necessary to plane and prove up type; and because, furthermore, proof tables,mallets and other apparatus used for planing and proving up type are expenvf sive and could not be considered in the/budgets of the schools in which the present apparatus will nd its greatest use, namely, in schools that are, in general, too small to support a machine operated printing press.

The flexible rubber map printing form, or mat 51 is made relatively thin and flexible to mnimize the cost of the same, as the cost of these flexible rubber printing forms, or dies, increases greatly with the thickness of the same. To bring the printing face of the rubber map form or mat 51 up suiciently high to engage the impression roller 21 during the printing operation, the rubber chase or tray 25 is provided. In usel the chase or tray 25 is placed on the uppersurface 16 of the bed 10, and the form or mat 51 placed therein. The slidable work-locating bar26 is then slid into engagement with oneend of the tray 25 to locate the latter and the form 51 in printing position. 'f A sheet of paper is then laid over` the printing form 51 and tray 25 and located and clamped in printing position, in the manner hereinbefore described for locating and clamping` the sheet 31, whereupon'the carriage 12 and impression roller 21 are run over the paper to complete the printing operation.

The tray 25 permits the use of relatively thin and flexible printing forms or mats 51 which 110 would oth'erwise'buckle or curl up if the slidable work-locating bar 26 were forced directly thereagainst to clamp the flexible printing form or mat 51 in printing position upon the bed 10. 'Ihe tray 25 thus providesan external support to pre- 115 vent buckling of the flexible printing form 51 used therein. The tray 25 shown is made of rubber but it maybe made of other material than rubberfsuch, for example, as wood, metal, or other material. However, the tray 25 is preferably 120 made of resilient rubber because Awhen made of this material it provides a resilient, yieldable base for the printing form or mat 51. This enables the mat 51 to yield slightly under the weight of the impression roller 21 and its carriage 12 so that the impression roller 21 and the paper sheet laid over the mat 51 may accommodate themselves during. the printing operation to any little irregularities that may exist between the vertical heights of the lines inscribed or molded on the printing face of the map printing form 51. Since the tray 25 thus permits the use lof'thin, flexible printing forms 51, it materially reduces the expenditure cost of which increases greatly with the thickness of theA same.

The printing faces 57 of the rubber type 48- assembled in the chase and the bottom of the imtype high 10. This arrangement permits the use of unmounted rubber cuts and unmounted linoleum cuts in the chase 1l, either with or without rubber type 48. As set forth in my aforementioned copending application, this is a matter of consider- '145 able importance since it effects a distinct economy in the use of rubber and linoleum cuts. The explanation of this resides inthe fact that mounted linoleum and mounted rubber for use in making these cuts is very much more expensive than the being shorter in length than the chase 11.

unmounted-material. This form of art,work has become increasingly popular in the schools in recent years, and to bem able to practice it using unmounted linoleum and unmounted rubber for making the cuts greatly reduces the expense and expenditure involved, especially when considering the fact that mounted linoleum blocks are very expensive (ten to fifteen cents per square inch) while unmounted linoleum is, relatively, very cheap; and scraps of this material may often be obtained for the asking by school children at stores and factories where this material is cut up, used, and sold. f)

The reason for the prior art practice of using mounted material for making these cuts resides in the fact that the prior art chases have in general been designed for use with metal type of the conventional type height (0.918), andf in order to use rubber or linoleum cuts with metal type of this height it is necessary to bring the printing faces of the cuts up to the same height, that is, type height, (0918"). Consequently, in order to bring the printing faces of the rubber or lino- -leum cuts up to type height (0918") it has always been the prior art practice `to mount the material used in making these cuts on a wooden block or base. The present apparatus is, therefore,believed to be the first ever designed so that printing may be done therewith from unmounted rubber and linoleum cuts. This belief is supported by the fact that vinquiry made of persons employed at the Chicago Art Institute, who are thoroughly familiar with this form of art work, revealed that to their knowledge printing from unmounted rubber and linoleum cuts had never been done and that no apparatus was available for so doing.

It may also be said here that unmounted linoleum cuts for use with the present apparatus may be made directly from so-called battleship linoleum by cutting the same into the desired sizes. ,This material comes on the market in two standard sizes, namely, 6 mm., and 635mm., both thicknesses of which are less than the conventional type height (0.918) of metal type with which mounted linoleum and rubber cuts have always heretofore been used.

The work-locating bar 26 is slidably mounted on the bed plate 10 so that it may be at different times moved into engagement with one end of the chase 11 or into engagement with one end of the printnig form tray 25; the tray or chase 25 The paper clamp 33 is mounted on and made slidable with the slidable work-locating bar so that it may be accommodated to the size of the paperv sheets that are used when printing from the tray 25 and printing form 51; these sheets being shorter than the sheets used when printing `from the 'chase 11.

The feature of mounting one of the two pivotal paper clamping members and two of the cornerlocating pieces 54 on the slidable work-locating bar 26 for slidable movement therewith relative to and over the bed 10, while mounting the other,

paper clamping member and the other two corner-locating pieces 55 so that the same are fixed, relative to the bed l0, isa-n important feature of Sthe present apparatus since it readily enables printing to be done upon sheets of paper of different sizes or lengths.

. It has been found by experiment with the present apparatus that as many as ten good, clear copies can be printed after each inking operation. Th'is is because of the fact that when the ink on,

for example, the printing faces 57 of the rubber type 48 (or on the printing form 51, or on a rubber or linoleum cut assembled in the chase 11) begins to play out, after( the rst four or ve copies or so have been made, on paper sheets, such as .31, downward pressure may be applied on the handle 22 of the impression roller carriage 12 to urge the impression roller 21 against the paper sheet 31, thereby urging the sheet 31 into engagement with the inked printing faces 57 of the type 48 (for example). In this way a larger number of good, clear copies can be obtained after each inking operation than would otherwise be possible. \The explanation of this lies, of course, in the downward pressure applied upon the handle 22 of the impression roller carriage 12. This pressure is eifective to force the impression roller 21 against thepaper sheet 3l because of the fact that the impression roller 21 and its carriage 12 ride upon the printing faces 57 of the type 48 during the printing operation and thereby lift the vertical rollers 18 of the carriage 12 up olf the horizontal walls 14 of the trackways 13. It is, therefore, evident that if the vertical rollers 18 did not ride up slightly off the horizontal Walls 18 of the trackwaysl during the printing operation, downward pressure applied upon the carriage 12 would be ineffective to force the impression roller 21 forcibly against the paper sheet 31 and the latter against the inked printing faces 57 of the type 48, and hence downward pressure on the carriage l2 would beunable to accomplish its intended purpose. i

It is desirable to be able to print ten or so copies after each inking operation because this minimizes the time and labor involved in inking the type. Some of the prior art presses seek to accomplish this by making the impressionrroller vertically adjustable on the frame of the carriage, relative to the bed of the press, but in the present apparatus this variation of the downward pressure of the impression roller may be controlled by the operator, in the manner hereinbefore explained, without necessitating any adjustment f the impression roller 21 in, or relative to, its frame 17; it being noted that the roller 21 in the present apparatus is incapable of any adjustment in the carriage frame 17 relative to `the bed 10. Thus the present carriage 172 accomplishes, without adjustment of the impression roller 21 in its carriage 12, what some of the prior art impression roller carriages seek to accomplish by making the impression roller vertically adjustable in its carriage, relative to the bed of consideredinew in the art, and of merit, is that it l is possible to print with the present press on sheets of paper, poster cardboard, and the like, of different thicknesses; without adjusting either the height of the type, chase, or impression roller. This is because of the fact that the impression roller 21 and its carriage 12, being freely movable vertically, vand yet guided against lateral movement by the engagement of the rollers 19 with the vertical walls 15 of lthe trackways, accommodate themselves to paper, cardboards, and the like of different thicknesses, that may be laid'over the chase 11 or tray 25, without adjustment of the height of the impression roller 21, the chase, or the type or printing form therein. This could not be 'done inthe prior art presses, in' so far as I am aware. Thus, for example, if, in the prior then ten posters on regulation poster cardboard,

which is about 0.050" in thickness, it would be necessary in the latter case either to raise the height of the impression roller, or to lower the height of the type.

The term printing form as used in the ap- I pended claims is generic and is intended to includev a form of rubber type 48, a printing mat or form, such as 51, anunmounted ,linoleum cut, an unmounted rubber cut, a wood cut, or any combination of these that may be assembled'upon the bed ofthe press in a chase, such as 11, or a tray such as 25, in the manner hereinbefore set forth or otherwise.

' While I have described'the preferred embodiments of the present printing press, the invention is not limited to the exact details of construction set forth, it being intended that the present invention shall include such variations and modifications as come within and are permissible within the scope of the appended claims.

, I claim:

1. In a printing press, the combination of a bed; work-locating means on the bed including a work-locating bar slidably mounted on and guided over the lbed; and paper-locating means on the bed including a paper-clamping member pivotally mounted on and slidable with the said work-locating bar over the said bed.

' 2. In'a printing press, the combination of: a bed having parallel trackways each including a horizontal wall; relatively flat, shallowrubber type arranged upon the said bed; and a carriage including an impression roller movable over the said bed and including vertical rollers movable along the horizontal walls of said trackways; the printing faces of said type being arranged slightly above the lowermost point of the impression roller when the-said vertical rollers are in engagement with the horizontal walls of said trackways so that the impression roller is forced to climb slightly up onto the printing faces of the type as it moves thereover, thereby causing the impression roller to ride with itsown weight and the weight of its carriage upon the printing faces of the type during the printing operation and .thereby slightly compressing the said type and accommodating the impression roller andthe impression-receiving sheet thereunder to any little irregularities thatmay exist between the vertical heights of the printing faces of the several type..

prior to the printing operation. l f

y 3. In alprinting press,- the combination of `a bed having parallel`trackways each including -a horizontal wall; relatively at,shallow. rubber` type arranged upon the said bed; and a carriage including an Vimpression roller movable over the? said bed and including vertical rollers movable along the horizontal walls of said trackways; the printing faces of said type being arranged slightly above the, lowermost point of the impression roller when the said vertical rollers are in engagement Ywith the horizontal walls of` said trackways so that.the impression roller is forced to climb slightly up onto the ,printing faces ofthe type as it moves thereover, thereby causing the impression roller to ride with its own weight and the ,weight of its carriage upon the printing faces of the type during the printing operation and thus accommodating the impression roller and `the paper sheet thereunder to any little irregularities printing faces of the several type prior to the printing operation; the said carriage includingv other rollers `movable over the trackways and cooperating therewith to prevent lateral .shifting movement of the carriage and impression roller both when the impression roller is riding upon the printing .faces of the type and when riding off the same during the printing operation.

4. In a hand printing press, the combination of: a bed; means including a slidable work-locating bar arranged upon the bed for locating a chase in printing position upon the bed and means including a paper clamping member piv otally mounted on and slidable with said slidable work locating bar for locating a paper sheet in printing position upon, and relative to, the said chase.

,5. In a hand printing press, the combination ment over said bed and adapted for engagement with one end of said chase; and means for successively locating paper sheets in printing position upon, and relative-to, the said bed and chase;

said paper locating means including a paperclamping member pivotally mounted onand slidablewith said slidable work-locating bar; vsaid paper-locating means including pieces attached tov said slidable bar and movable therewith for successively locating corresponding corners of the said papersheets upon, and relative to, the said chase. I

6.' In a printingvpress, the combination of: a bed having parallel trackways; a printing form arranged upon the bed; and a. carriage including an impression roll movable over the said bed; said carriage including anti-friction elements movable over and normally bearing with their own weight andthe weight of said carriage upon said trackways; said printing form including a printing face have component parts and said printing face projecting slightly above the lowermost point of said impression roll when the said antifriction elements are in bearing engagement with the saidtrackways; so that the said impression roll is vforced to climb slightly up onto the said printing face as it is moved lthereover; thereby lifting the said anti-friction elements up out of engagement with said trackways and causing the impression roll to ride with its own weight and the weight of its carriage upon the said printing face of. the form during the printing operation; thereby accommodating the said impression roll and theimpression-receiving member adapted to be laid thereunder upon said printing face to any 'little irregularitiesf or differences that may exist ,between the vertical heights of the said component parts of said print face prior to the start of the vprinting operatic the said carriage including other' anti-friction elements cooperating with the said trackways to prevent lateral movement of the carriage and. its impression roll both 1 when the impression roll is riding with its owny and a carriage including an impression roll movable over the said bed; said carriage includinganti-friction'elements movable over and normally bearing with their own weight and the weight of said carriage upon said trackways; said printing form including a printing face having component parts and said printing face projectng slightly above the lowermost point of said impression roll when the said anti-friction elements are in bearing engagement with the said trackways; so that the said impression roll is forced to climb slightly up onto the said printing face as it is moved thereover; thereby lifting the said operation; the said carriage including other antifriction elements cooperating with the said track- Ways to prevent lateral movement of the carriage and its impression roll both when the impression roll is .riding with its own weight and that of its carriage upon the said printing face and when the said impression roll is riding off from the said printing face as the carriage is moved over the bed.

8. In a printing press, the combination of: a bed having parallel trackways; a resilient, cornpressible printing form arranged upon the bed; and a carriage including a resilient, compressible impression-roll movable over the said bed; said carriage including anti-friction elements movable overfand normally bearing with their own weight and the weight of said carriage upon said trackways; said printing form including a printing face having component parts and said printing face projecting slightly above the lowermost point of said impression roll when the said anti-friction elements are in bearing engagevment with the said trackways; so that the said `and the Weight of its carriage upon the said printingv face of the form during the printing operation; therebyv slightly compressing said printing formA and impression roll and thus accommodating the said impression roll andthe impression-receiving `member adapted to be laid thereunder upon -said printing face tofany little irregularities or` differences that `may exist between the vertical heights of thef said component parts of said printing face prior to the start of Athe printing operation; the said carriage including other anti-friction elements cooperating with the said trackways to prevent lateral movement of the carriage and its impression roll both when-the impression roll is riding with its own weight and that of its carriage upon the said printing face and when the said impression roll is riding off from the said printing face as 'the carriage ismoved over the bed.

V9. In a printing press, the combination of: a bed having parallel trackways; a printing form arranged upon the bed; and a carriage including an impression roll movable over the said bed; said carriage including anti-friction elements movable over and normally bearing with their own weight and the weight of said carriage upon said trackways; said printing form including a printing face having component parts and said printing face projecting slightly above the lowermost point of said impression roll when the said antifriction elements are in bearing engagement with the said trackways; so that thev said, impression roll is forced to climb slightly up onto the said printing face as'itis moved thereover; thereby lifting the said anti-friction elements up out -of engagement with said trackways and causing the impression roll to ride with its own weight and the weight of its carriage upon the said printing face of the form during the printing operation; thereby accommodating the said impression roll and the impression-receiving member adapted to be laid thereunder upon said printing face to any little irregularities or differences that may exist between the vertical heights of the said component parts of said printing face prior to the start of the printing operation. p

' 10. In a printing press, thecombination of: a bed having parallel trackways; a resilient, compressible printing form arranged upon the bed; and a carriage including an impression roll movable over the said bed; said carriage including anti-friction elements movable over and normally bearing with their own weight and the weight of said carriage upon said trackways; said printing form including a printing face having'component parts and said printing face projecting slightly above. the lowermost point of said impression roll when the said anti-friction elements are in bearing engagementwith the said trackways; so that the said impression roll is forced to climb slightly up onto the said printing face as it is moved thereover; thereby lifting the said antifriction elements up out of engagement with said trackways and causing the impression roll to ride with its own weight and the weight of its carriage upon the said printing face of the form during the printing operation; thereby slightly compressing the said form and thus accommodating the said impression roll and the impression-receiving memberadapted to be laid thereunder upon said printing face to any little irregularities or differences that may exist between the vertical heights of the said component parts of said printing face prior to the start of the printing operation.

11. In a printing press, the combination of: a bed having parallel trackways; a resilient, compressible printing form arranged upon the bed;

andra carriage including a resilient, compressible impression roll` movable over the said bed; said carriage including anti-friction elements movable over and normally bearing with their own weight and the weight of said carriage upon said trackface projecting slightly above the lowermost point of said impression roll when the said antifriction elements are in bearing engagement with the said trackways; so that the said. impression roll is forced-to climb slightly up onto the said printing face as it is moved thereover; thereby lifting the said anti-friction elements up out of engagement with said trackways and causing the impression roll to ride with its own weight and the weight of its vcarriage upon the said printing face of the form during the printing operation; thereby slightly compressing said printing form and impression roll and thus accommodating the said impression roll and the impression-receiving `tion.

member adapted to b e laid thereunder upon s aid printing face'to any little irregularities or differences that may exist between the vertical heights of the said component parts of said printing face prior to the start of the printing opera- 12. In a printing press, the combination of a bed; work-locating means on the bed including a work-locating memberslidably mounted on and guided for movement over said bed; and meansv locating means including members attached to and slidable with said slidable Work-locating member for successively locating corresponding corners of the said impression-receiving sheets in printing position upon and relative to said bed.

14. In a printing press,v the combination of a bed having' parallel trackways each including a vertical wall and a horizontal wall; andan impression-roll carriage movable over saidmbed; said carriage having vertical anti-friction elenients movable over, and normally bearing with their own weight and tle Weight of said carriage upon, the upper surfaces of the said horizontal Walls of said trackways; said carriage being free to move and being adapted to move during the printing operation in a vertical plane relative to and above said bed up onto the printing face of printing form assembled upon said bed; and said carriage including other and horizontal anti-friction elements having bearing engagement with the said vertical walls of the trackways and cooperating with the latter to prevent lateral orA shifting movement of the carriage both when lthe-said-vertical anti-friction elements are in engagement with'and bearing.

upon the said horizontal walls of the said trackways and when said carriage climbs slightly up onto the printing face of said printing form and thereby raises said .vertical anti-friction ele-` ments up oi from and above the horizontal wall-s of said trackways during the printing operation,

15.*In a printing press: a bedhaving substantially parallel trackways each including a vertical wall and 'a horizontal wall; and an impression roll carriage movableover said bed; said carriage including vertical anti-friction elements normally bearing with their own weight and the weight of said carriage upon the upper surfaces of said trackways; and said carriage 'including other and horizontal anti-friction elements having bearing engagement with the said vertical walls of the trackways and cooperating with the said vertical walls to prevent movement of the carriagein a direction transverse to the axis of the trackway as it is moved over said bed.

16. In-a printing press: a bed having substan-4 tially parallel trackways each including a substantially vertical wall and a substantially hori-` zontal wall; and an impression roll carriage movable over `said bed; said carriage includingv lanti-friction elements movable along said track- Ways;` certain of said anti-friction elements bearing with their own weight and the weight of said carriage upon the upper surfaces of the ysaid horizontal walls of the trackways; and certain others of said anti-friction elements having bearing engagementA with the said vertical walls of fthe trackways and cooperating with the latter to prevent movement of the carriage in -a direction transverse to the axis of the trackways as itis moved over said bed.

17. In a printing press: a bed having substantially parallel trackways each including a substantially vertical wall 'and ar substantially horizontal Wall; and an impression roll carriage movable over said bed;said carriage being freely movable in a vertical plane relative to and above said bed and trackways so as to enable itjto climb slightly during the printing operationup onto the printing face of a printing form assembled on the bed but normally bearing with its own weight upon the upper surfaces of the said horizontal walls of the trackways as it is moved over said bed; and said carriage including antifriction elements having bearing engagement with the said verticaL walls of the trackways and cooperating with the latter to prevent movement of the carriage in a direction transverse .I

to the axis of the trackways both when the carriage-.is riding with its Weight upon the horizontal walls of said trackways and when it is riding 01T from and above the said horizontal walls and upon the printing face of said printing form during the printing operation.` y

18T In a printing press, the combination of:

a bed having substantially parallel trackways.

each including a Vertical Wall and ahorizontal wall; an impression-roll carriage movable over said bed; said carriage being freely movable in a vertical plane relative to and above said bedy as it is moved thereover during the printing operation so aspto accommodate its impression roll to any -little irregularities or differences in vertical height that may exist between the component parts of a printing form or the like assembled-on the bed; but said carriage normally riding and bearing with its own weight upon the said horizontal walls of the trackways; said carriage being equipped with anti-friction means and said anti-friction means cooperating with l the said trackways to prevent movement of the carriage in a direction transverse to the, axis o'f the trackways both when the carriage is riding and bearing with its own weight upon the horizontal walls of the trackways and when -the carriage is .riding off from and above the said horizontal walls of the trackways as it is moved over the bed .during the printing operation.

19. In a printing press, the combination of:

a bed adapted to have arranged thereon an impression-transmitting form or -body and having' substantially parallel trackways each including a Vertical wall andahbriz'ontal wall; an impression-roll carriage movable over said bed; said carriage being freely movable in' a vertical plane relative to and above said bed as it is moved 4thereover during the impression-transmitting operation to enable its impression roll to climb slightly up 'onto the impression-transmitting 1145 face of an impression-transmitting form or body arranged upon the said bed; but said'carriage normally riding and bearing with its own weight upon the said horizontal walls of the trackways.'

said carriage being equipped with guiding means and said guiding means cooperating with said trackways to prevent movement or the carriage in a direction transverse to the axis of the trackways both when the carriage is riding and bearing with its own Weight upon the horizontal Walls of the trackways and when the carriage is riding off from and above the said horizontal walls of the trackways during the impression-transmitting operation. t

20. In a printing press, the combination of: a bed adapted to have arranged thereonv an impression-transmitting formA or body and having substantially parallel trackways each including a vertical wall and a horizontal Wall; an impression-roll carriage movable' over saidv bed; said carriage being freely movable in a vertical lplane relative to and above said bed as it vis vmoved thereover during the impression-transmitting operation to enable its impression roll to climb slightly up onto the impression-transmitting face of an impression-transmitting, form or body arranged upon the said bed;` but said carriage normally riding and bearing with its own weight upon the said horizontal walls of the trackways; said press being equipped with guiding means and said guiding means preventing movement of the carriage in a direction transverse to the axis of the trackways both when the carriage is riding and herring with its own weight upon the horizontal walls of `the track- Ways and when the carriage is riding off from and abovetrthe said horizontal walls of the trackways during the impression-transmitting operation.

21. A printing press comprising the combination of: a bed having substantially parallel trackways; a carriage movable over the bed along the trackways .and including an impression roll; said carriage and its impression roll being movable vertically relative to the-bed when moved thereover to accommodate the impressionroll to any little differences that may exist between the verticalheights of the printing vfaces of type assembled upon the bed prior to the start of the printing operation; said press including means cooperating with the trackways to guide the carriage as it is moved over the bed While permitting Vertical movement of the carriage and the impression roll relative to the bed to eiect said accommodation of the impression roll to such differences in the vertical heights of the type assembled upon the bed as may exist prior to the start of the printing operation.

f 22. A printing press comprising the combination of: a bed having substantially parallel trackways; a carriage movable over thev bed along the trackways and including an impression roll;

said impression roll being movable vertically relative to the bed when moved thereover to accom-- modate itself to any little differences that may exist between the vertical heights of the printing faces of type assembled upon the bed prior to the start ofthe printing operation; said press including means cooperating with the trackways to guide the carriage as it is moved over the bed While permitting vertical movement of the impression roll relative to the bed to elfect said accommodation of the impression roll Ito such diierences in the vertical heights of the type assembled upon the bed as may exist prior to the start of the printing operation.

HARVEY J. REARDON.