US3859917A - Screen printing press - Google Patents

Screen printing press Download PDF

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Publication number
US3859917A
US3859917A US299689A US29968972A US3859917A US 3859917 A US3859917 A US 3859917A US 299689 A US299689 A US 299689A US 29968972 A US29968972 A US 29968972A US 3859917 A US3859917 A US 3859917A
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United States
Prior art keywords
frame
arms
drive
press
movement
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Expired - Lifetime
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US299689A
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English (en)
Inventor
Henry J Bubley
Claude H Oltra
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American Screen Printing Equipment Co
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American Screen Printing Equipment Co
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Publication date
Application filed by American Screen Printing Equipment Co filed Critical American Screen Printing Equipment Co
Priority to US299689A priority Critical patent/US3859917A/en
Priority to CA183,252A priority patent/CA1006046A/en
Priority to GB4861373A priority patent/GB1435214A/en
Priority to ES419864A priority patent/ES419864A1/es
Priority to FR7337872A priority patent/FR2203710B1/fr
Priority to IT53330/73A priority patent/IT1003548B/it
Priority to JP48119775A priority patent/JPS49101111A/ja
Priority to AU61758/73A priority patent/AU480676B2/en
Application granted granted Critical
Publication of US3859917A publication Critical patent/US3859917A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0804—Machines for printing sheets
    • B41F15/0813—Machines for printing sheets with flat screens
    • B41F15/0818—Machines for printing sheets with flat screens with a stationary screen and a moving squeegee

Definitions

  • An improved screen printing press having a first frame with a surface to receive work for printing and a second frame pivotally mounted on the first frame and having a pair of spaced-apart support arms for movement therewith toward and away from the surface, a chase pivotally mounted on the first frame beneath the arms, and movable therewith, a screen removably mounted on the chase, a carriage assembly means, with a squeegee and a flood bar, mounted for recipro- References Cited cal movement on the arms, the second frame also hav- UNITED STATES PATENTS ing, at a rear portion thereof, a press drive means op 1,821,302 9/1931 Gomer 101/126 eratively Connected to drive arms mounted for Pivotal 1,840,073 1/1932 Williams 101/123 movement on the first
  • the second frame pivots with respect ,989 10/1935 Wulf 101/126 to the first frame about an axis in the plane of the 2,704,510 3/1955 Walsh 101/123 work surface to eliminate smearing during the move- 2,709,404 5/1955 Stokes 101/12 ment of the second frame.
  • a timed relationship exists I i u between the upward pivotal movement of the second 2936705 5,1960 Z?
  • the printing head including the screen frame, is raised and lowered to permit insertion and removal of the stock to be printed.
  • this printing head is mounted on a fixed frame containing'a bed and press drive means, and is raised and lowered with respect to the bed and fixed frame on a pivot point above the bed.
  • An advanced and novel form of press of this type is sold by American Screen Printing Equipment Company of Chicago, Ill. and is the subject of U.S. Ser. No. 83,800, filed Oct. 26, 1970, and titled Glider Press, now U.S. Pat. No. 3,731,623, issued May 8, 1973.
  • the printing head when moved upwardly with respect to the surface of the printing bed at the end of a print stroke, tends to move a rear portion of the screen into contact with the printed work, because of the placement of the pivot point, thereby smearing the work.
  • the pivot point in is disposed at the rearmost portion of the base, which places an inordinate amount of weight forward of the pivot point. This weight produces excessive stresses and wear on the power means and cam drive means, and instability and possible undesirable movement and vibration of the frame.
  • the prior art also mounts the driving arm, which drives the squeegee and flood bar assembly A, inside the support arms, on the pivoting frame itself. Since the assembly A is therefore movable with respect to a moving frame rather than a fixed frame or reference point, its movement and registration are adversely affected by any instability or movement of the movable frame. Because of these problems, it has been impossible to engineer and construct large size printing presses according to Fuchs by merely scaling the size of the movable frame. The excessive weight and instability encountered have precluded proportioning elements such as the drive arms necessary to scale the prior art to larger sizes. Finally, the prior art teaches pivoting the entire master frame about the rear pivot point located slightly above the horizontal plane of the screen, necessitating accurate re-registration of the entire frame and screen, with respect to the printing surface, each time the printing head moves downward.
  • This improved screen printing press overcomes the disadvantages of present presses by a first fixed frame and a second frame pivotal on pivot points disposed on the first frame in the horizontal planeof the surface of the printing bed of the fixed frame, and in a vertical plane forward of the press drive means.
  • the second frame supports the printing head, including the support arms, the carriage assembly means having the squeegee and flood bar, a chase and a screen frame mounted thereon, and, to the rear of the pivot points, a press drive means.
  • the location of the pivot point in the horizontal plane of the printing surface allows movement of the printing head toward and away from the printing surface with out smearing of the work since the chase and screen will not move downwardly toward that surface when they are pivoted relative to the first frame with the printing head.
  • the drive arm means connecting the press drive means and the carriage assembly means are mounted on the first fixed frame and outside of the carriage assembly support arms.
  • Such mounting assures steady and uniform movement of the carriage assembly means by the drive arms since they are mounted on a fixed reference point rather than a movable frame. It also allows support of the significant weight of the massive drive arms necessary for very large presses on the rigid first fixed frame rather than the movable second frame.
  • This feature together with the location of the pivot points on the first frame to permit a proper, balanceddistribution of the weight of the components mounted on the second frame on either side of the pivot point, allows sca ling of this press to any desired size by eliminating the stresses, excessive power demands and inordinate weight which precluded proportioning previous presses to larger sizes.
  • the press lift cam is so formed that, while it is being rotated by the press drive means against a cam follower fixedly mounted on the first frame to move the printing head rapdily upward, the connecting means driving the drive arm means, and being rotated at the same speed of rotation by the same press drive means, will reach a point of linear alignment in which, through a few degrees of rotation by the press drive means, the slight relative movement of the connecting means causes only sufficient movement of the drive arm means to eliminate forward creep of the carriage assembly means.
  • the carriage assembly means itself has a novel parallelogram movement which acts to shift the flood bar and squeegee bar relative to one another while maintaining them in balanced, locked-in relationship.
  • the chase or master frame of this invention is independently pivotally mounted on a horizontal axis defined by the pivot points to permit the use of either the harmonic peeling means set forth in detail in U.S. Ser. No. 83,800 now U.S. Pat. No. 3,731,623 or a uniform rate of peel with this form of press so that off-contact printing resulting in high-fidelity prints is possible.
  • the mounting of the chase in such a manner also permits accurate re-registration of the screen frame with respect to the printing surface, since the chase will always remain registered in the plane of the surface at its pivot point.
  • FIG. 1 is a perspective view of the improved printing press of this invention shown with the printing head in its upward position near the end of a printing cycle;
  • FIG. 2 is an enlarged, fragmentary side elevational view of the printing press shown in FIG. 1 with the screen in printing'position;
  • FIGS. 3-7 are reduced side elevational views of the printing press shown in FIG. 1 which illustrate the operation of the press and the timed relation between the movement of the second frame and the carriage assem-
  • FIG. 8 is an end elevational view of the rear portion of the second frame including the power drive means, the cam, cam follower and springs;
  • FIG. 9 is an enlarged fragmentary side elevational view of a carriage assembly positioned adjacent the forward stop means in the position assumed during the print stroke;
  • FIG. 10 is an enlarged fragmentary side elevational view of the carriage assembly shown in FIG. 9 in the position assumed during the flood stroke;
  • FIG. 11 is a fragmentary side elevational view of the carriage assembly shown in FIG. 10 converted to nonflood scoop position.
  • This press 10 includes a first fixed frame '12 having a control console 15 located at its front which permits an operator to control the operation of the press.
  • the first frame 12 has a printing bed 16 located at its top which is preferably a vacuum base of the type described in now abandoned application U.S. Ser. No. 674,623, filed Oct. 1 1, 1967 and titled Vacuum Base.
  • a vacuumto the printing surface 17 of bed 16 is supplied through a flexible conduit 19 joined to a vacuum source 18, which is supported on the frame 12.
  • the air flow through the conduit 19 may be reversed to provide a blow-black release of the stock being printed, which'is particularly advantageous in releasing heavy stocks.
  • This screen printing press 10 also has a second frame 14 which is pivotally mounted on first frame 12 at a pivot point 13.
  • the second frame 14 is pivotally movable with respect to the first frame 12 on a horizontal pivot shaft 23 extending between similar pivot points 13 disposed on opposite sides of the first frame 12 and located in approximately the samehorizontal plane as printing surface 17.
  • Second framel4 has, at its front portion, a screen printing head, indicated generally at 20, which includes a pair of parallel spaced support arms 21 and 21' having a carriage assembly means, generally indicated at 22, mounted for movement therealong.
  • the carriage assembly means 22 includes a carriage assembly 24 and 24' disposed on each of the support arms 21 and 21', respectively.
  • the carriage assemblies 24 and 24 are of identical, but reverse construction, one being a mirror image of the other. They are linked together for unitary movement by a pair of joining rods 30 extending between them.
  • a master frame or chase 37 is disposed below support arms 21 and 21' and is mounted for independent pivotal movement about pivot shaft 23 on a spherical bearing 39 and a bracket 36 disposed on opposite sides of frame 12, as shown in FIG. 2.
  • the master frame 37 is movably attachable, at its front end, to the midportion of a lateral brace 64 joined to vertical braces 65 and 65' which extend downwardly from support arms 21 and 21' to assure rigidity of the chase 37. While this mounting enables the chase 37 to be raised with the printing head 20 during the printing cycle, it also permits the chase 37 to be lowered independently of the head 20, for purposes of changing the stencil screen 38, by detaching its forward end from the lateral brace 64. Since the rear portion of the chase 37 will always, in this manner, be returned to its previous position in the plane of the surface 17 of printing bed 16,
  • the stencil screen, 38 is held in the chase 37 by clamps 68, or the equivalent, acting against its frame, which are chosen to facilitate replacement of the screen.
  • the entire printing head may be locked in to front lock stops 90 and 90 during printing by bearings on braces 65 and 65 to assure proper screen position.
  • the press drive means is mounted on a rearward portion of second frame 14 and is generally indicated at 40 in FIG. 1 and shown in more detail in FIG. 8. It includes a motor 41 mounted on a movable motor support 42 having a threaded shaft 43 cooperating with threads on the support to permit adjustment of the motor relative to the second frame 14.
  • a variable speed drive pulley 44 is mounted on motor 41 and, through a belt 45, drives a pulley 46 mounted on an inputshaft 47 of a reduction gear arrangement 48.
  • the reduction arrangement 48 is of a known type having an output shaft 49 disposed at right angles to input shaft 47 and extending from its opposite sides.
  • Output shaft 49 is rotated to drive a press lift cam 51 disposed on one side of gear arrangement 48 and a main drive lever arm 50 disposed on the opposite side.
  • a number of mechanically operated switches and linkages 52 are coordinated and activated with the operation of the press to perform various functions in the printing cycle, e.g., energizing the vacuum bed and applying the blow-back.
  • a take-off apparatus may be energized and synchronized with the press by a microswitch mounted on the press.
  • additional switches could be provided for other accessories and the activation of various functions could be accomplished by alternative means such as electrical timers and switches and control cams.
  • the main drive lever arm 50 is connected, through a second arm 54, to L-shaped arm 55 which has its opposite end fixedly mounted on a rotatable shaft 56 extending through bearings on the first frame 12 and joined, at its opposite ends, to identical drive arms 59 and 59', as shown in FIG. 8.
  • the drive arms 59 and 59 which are mounted on the first frame 12 through shaft 56, are generally L-shaped and connected at their opposite ends through drive rods 60 and 60 to carriage assemblies 24 and 24', respectively.
  • the length of stroke made by the drive arms and carriage assemblies is variable by adjusting the position of second arm 54 in an arcuate slot 57 formed in L-shaped arm 55, since shaft 56 and pivoting shaft 23 are always maintained in vertical alignment and generally form a triangle with output shaft 49.
  • the design of the press drive means 40 permits it to be located within the sides of the bed 17 and chase 37.
  • the mounting of the heavy drive arms 59 and 59 on the first frame 12 permits the size of the press to be proportionately increased without adversely increasing the weight of the second frame 14.
  • Bed '17 is also unobstructed by drive arms 59 and 59' during the printing cycle, which permits mechanical feeds, conveyors and the like to be used with the press, or the press to be used as an element in a printing system.
  • mechanical-type takeoffs having mechanical fingers for removing printed stock from the press bed 17 are used, it has been found desirable to form cut-out areas in bed 17 along the edge of the press adjacent the takeoff to permit the fingers to better grip the stock on the bed.
  • the press lift cam 51 is positioned so that its perimeter is constantly in cooperation with a cam follower 62 mounted on frame 12 through a rigid cam follower arm 63.
  • cam 51 is rotated on shaft 49 toward its high side, the second frame 14 is pivoted with respect to the first frame 12 about pivot points 13 on pivot axis 23, to move the printing head 20 upwardly away from the printing bed 16 and the rear portion downwardly.
  • a carriage assembly 24 is described in more detail in FIGS. 9 and 10. This assembly is of identical, but reverse construction to carriage assembly 24 mounted on the opposite support arm 21.
  • Carriage assembly 24 has a housing 25 mounted on arm 21 and connected at its rearward end by a pivotal connection 27 to drive rod 60 and drive arm 59.
  • Nylon guides (not shown) are provided within the housing 25 to assure smooth and friction-free movement of the carriage assembly 24' along the arm 21, during the printing cycle.
  • the housing 25 contains a shuttle 26 captive between its inside surface and the outside surface of arm 21.
  • the shuttle 26 is provided with a continuous cam track 31, which functions to shfit a flood bar and a squeegee in a generally vertical movement relative to one another.
  • the shuttle 26 itself is linearly moved with respect to housing 25 upon engaging stops 72 and 74 disposed at opposite ends of arm 21.
  • a shuttle catch 75 is pivotally mounted on housing 25 to engage shuttle 26 and prevent its movement during the flood traverse. The catch is disengaged when the shuttle hits stop 72.
  • a movable parallelogram support 32 is disposed on the outside of housing 25 with the top and bottom members of the parallelogram pivotally mounted thereon through bearing bolts 29. The opposite side members of the parallelogram 32 are pivotally connected to the top and bottom sides of the parallelogram 32 to move in vertically opposite directions.
  • One side member supports a squeegee assembly 33 and the other a flood bar assembly 35.
  • a cam follower roller 28 is captively disposed to ride in cam track 31, and is attached through the vertical squeegee support member of the parallelogram to the squeegee assembly 33.
  • This roller 28 functions to move the parallelogram 32 in pivotal movement about the bearing bolts 29 in response to linear movement of the shuttle 26 at the end of each stroke.
  • direct movement of the squeegee 33 with the roller 28 causes corresponding opposite vertical movement of the flood bar 35, providing a system in which the squeegee and flood bar are positively locked in a constant relationship for corresponding movement.
  • the stop 72 engages the facing end of shuttle 26 while the carriage housing 25 continues its transverse movement, thereby causing the cam follower roller 28 to be moved in the cam track 31, shifting the parallelogram 32 and Iowering the squeegee 33, as shown in FIG. 9.
  • the stop 74 engages the shuttle and shifts it in a similar manner to reverse the positions of the squeegee and flood bar, for the return stroke, as shown in FIG. 10.
  • the flood bar and the flood bar assembly 35 may be replaced with a second squeegee to permit printing in both directions. In such event, the cam 51 will be timed to lower the press head 20 before forward movement of the carriage assembly 40 is commenced.
  • FIGS. 1-7 The operation of the press is shown in FIGS. 1-7.
  • each carriage assembly during the forward or non-print stroke is shown in FIG. 10 for the flood type operation. If a non-flood scoop is used, the position of the flood and squeegee assemblies would be as shown in FIG. 11. In either operation, the ink' pool is moved to the front of the screen by this stroke.
  • FIG. 4 shows the press at approximately the midpoint of the print stroke, using the contact method in which the screen remains in place.
  • drive arms 59 and 59' reach the rear position, shown in FIG. 5, the print stroke is complete.
  • the carriage assemblies 24 and 24' have engaged stops 74 and 74 near the rearof the respective press arms 21 and 21', causing the flood bar to be lowered and the squeegee head to be elevated.
  • the press lift cam 51 is approaching its high side, causing the second frame 14 to be pivoted about horizontal axis 23, thereby moving the printing head 20 away from the printing bed 16.
  • FIGS. 5 and 6 clearly show the novel, timed relationship between the movement of the second frame 14 and the movementof the drive arms 59 and 59' and associated carriage assembly means 22.
  • the second frame 14 continues to be pivoted and the printing head 20 raised to its uppermost position, while the drive arms are backedoff slightly to hold carriage assembly means 22 in a position adjacent stops 74 and 74' thereby preventing forward creep along the press arms.
  • cam 51 moves to its greatest radius
  • main drive lever arm 50 and the second arm 54 move through an arc which imparts only sufficient rearward linear movement to the drive arms 59 and 59 to constantly maintain carriage assembly means 22 adjacent the rear of the press arms during the continuing upward movement of the printing head.
  • carriage assembly means 22 is therefore held firmly adjacent stops 74 and 74' by this slight, but constant backing off force of the drive arms exactly corresponding to the movement of the printing head and theforward force exerted by the press arms on the carriage assembly means, shaking or vibration and splattering of ink is eliminated. It is also significant that because of the lo cation of pivot point 13, the rear portion of screen 38 never swings in an are that will bring it in contact with the surface 17 of the printing bed 16. The entire press may also be caused to dwell or stop in the condition shown in FIG. 6 to enable the removal of printed stock and the insertion of unprinted stock.
  • the second frame 14 begins to pivot toward the printing surface 17, and lever arm 50 and second arm 54 reach a point in their arc where their movement initiates forward movement of the drive arms 59 and 59' and the carriage assembly means 22, as shown in FIG. 7.
  • the second frame 14 is also being constantly urged to a horizontal position with respect to the printing bed 16 of the first frame 12 by spring means 58 and 58' which have one end connected by a turnbuckle to a rear portion of the second frame l4 and an opposite end connected to a supporting brace on the first fixed frame 12.
  • the peeling mechanism disclosed in that application may be mounted on the present press so that the rate of peeling follows a harmonic motion pattern in that peeling is faster as the squeegee moves across the center of the screemthan at either end, thereby compensating for the greater tendency of the screen materials to stretch at that point. Peeling is accomplished by cables connected to the front of chase 37 and releasable therefrom to permit movement of the chase with respect to the printing head 20. These cables are each extended over pulleys and through a support arm 21 or 21' to pulleys positioned on shaft 56 for rotation therewith.
  • the press of the present invention is of rugged design and constructed of standard, available materials, which makes it quite economical to manufacture. Moreover, the press is of universal design, permitting it to be scaled up or down to meet particular customer requirements.
  • a printing press including fixed frame, a bed supported on said frame and having an upwardly facing surface to receive work to be printed, a second frame pivotally mounted on said first frame, a pair of spacedapart arms mounted on a front portion of said second frame for pivotal movement therewith toward and away from said bed, a chase pivotally mounted beneath said arms, said chase being positioned over said work on said bed during printing, a screen removably mounted on said chase, carriage assembly means mounted on said arms for movement therealong, a drive arm pivotally mounted on said first frame and connected to said carriage assembly means, press drive means mounted entirely on a rear portion of said second movable frame to move said carriage assembly means reciprocally along said arms during a printing cycle and to pivot said second movable frame relative to said first fixed frame during the printing cycle, means operatively connecting said press drive means mounted on said second frame to said drive arm means pivotally mounted on said first frame, said press drive means operatively engaging said first frame to pivotally move said second frame about a pivot point disposed generally in the horizontal plane of said surface
  • said press drive means includes a power drive shaft rotatable about a central axis, said power drive shaft having a cam mounted for rotation therewith near one end thereof and linking means mounted'on an opposite end thereof and operatively connecting said press drive means with said drive arm to pivot said drive arm relative to said first frame, said cam engaging a cam follower mounted on said first frame to move said second frame about said pivot point, said cam and said linking means being moved by said power drive shaft driven by said press drive means, such that as the rotation of said cam causes said second frame to be pivoted upward with respect to said bed near the end of a printing stroke, further movement of said linking means will, through a desired period of time, cause sufficient backing movement of said drive arm and said connected carriage assembly to preclude forward creep of said carriage assembly along said spaced-apart arms during said upward movement of said second frame.
  • said drive arm mounted on said first frame includes a pair of spaced drive arms mounted for corresponding pivotal movement with respect to said first frame on a drive shaft extending between them, each of said drive arms disposed outside of said arms supporting said carriage assembly.
  • a printing press including a first fixed frame, a bed supported on said frame and having an upwardly facing surface to receive work to be printed, a second frame pivotally mounted on said first frame, a pair of spacedapart arms mounted on a front portion of said second frame for pivotal movement therewith toward and away from said bed, a chase pivotally mounted beneath said arms, said chase being positioned over said work on said bed during printing, a screen removably mounted on said chase, a carriage assembly mounted on said arms for movement therealong, a drive arm pivotally mounted on said first frame and connected to said carriage assembly, press drive means mounted on a rear portion of said second frame and operatively connected to said drive arm to drive said drive arm and thereby move said carriage assembly reciprocally along said arms, said press drive means including a power drive shaft rotatable about a central axis, said power drive shaft having a cam mounted for rotation therewith near one end thereof and linking means mounted on an opposite end thereof and operatively connecting said press drive means with said drive arm to pivot said drive arm relative to said first frame
  • a printing press including a first fixed frame, a bed supported on said frame and having an upwardly facing surface to receive work to be printed, a second frame pivotally mounted on said first frame, a pair of spaced-apart arms mounted on a front portion of said second frame for pivotal movement therewith toward and away from said bed, a chase pivotally mounted be neath said arms, said chase being positioned over said work on said bed during printing, a screen removably mounted on said chase, a carriage assembly mounted on said arms for movement therealong, a drive arm pivotally mounted on said first frame and connected to said carriage assembly, press drive means mounted on a rear portion of said second frame and operatively connected to said drive arm to drive said drive arm and thereby move said carriage assembly reciprocally along said arms, said carriage assembly including a pair of spaced carriage housings, each housing supported on one-of said arms, means on each carriage housing for supporting a squeegee and a flood bar in associated relationship for movement relative to each other corresponding to the position of said screen over said bed, said a
  • a printing press having a first fixed frame, a bed supported on said frame having an upwardly facing surface to receive work to be printed, a second frame mounted for pivotal movement on said first frame, a pair of spacedapart arms mounted on said second frame for movement therewith, a chase pivotally mounted beneath said arms and positioned over said work on said bed during printing, a screen removably mounted on said chase, a carriage assemblymounted on each of said arms for movement therealong, a drive arm connected to each of said carriage assemblies, press drive means mounted on said second frame and operatively connected to each drive arm to drive each drive arm and thereby move each of said carriage assemblies in associated, reciprocal fashion along said arms, the improvements including pivot points disposed on opposite sides of said first frame and forming a horizontal axis about which said second frame is pivotally moved during a printing cycle, said pivot points disposed generally in the horizontal plane of said surface of said bed adjacent a rear edge of said surface and allowing a rear portion of said second frame on which said press drive means is mounted to be swung
  • said press drive means includes a power drive shaft rotatable about a central axis, said power drive shaft having a cam mounted for rotation therewith near one end thereof and linking means mounted on an opposite end thereof and operatively connecting said press drive means with said drive arms to pivot said drive arms relative to said first frame, said cam engaging a cam fol lower mounted on said first frame to move said second frame about said pivot point, said cam and said linking means being moved by said power drive shaft driven by said press drive means, such that as the rotation of said cam causes said second frame to be pivoted upward with respect to said bed near the end of a printing stroke, further movement of said linking means will, through a desired period of time, cause sufficient backing movement of said drive arms and said connected carriage assemblies to preclude forward creep of said carriage assemblies along said spaced-apart arms during said upward movement of said second frame.
  • said drive arm includes a pair of spaced-apart L-shaped arms pivotally mounted on said first fixed frame within the side margins of said chase, said L-shaped arms being mounted on a common axis which is in generally vertical alignment with the horizontal axis between said pivot points of said second frame on said first frame.
  • said press drive means includes a power drive shaft rotatable about a central axis and adjustable linkage means to impart motion from said power drive shaft to each drive arm to drive said carriage assemblies reciprocally along said arms, said central axis of said power drive shaft, said axis ofsaid pivot points and an axis extending between said drive arms generally forming a triangulate prismatic arrangement during the printing cycle, to permit adjustment of the length of the stroke of said carriage assemblies by adjustment of said linkage means connecting said drive shaft and said axis extending between said drive arms.
  • a printing press having a first fixed frame, a bed supported on said frame having an upwardly facing surface to receive work to be printed, a second frame mounted for pivotal movement on said first frame, a pair of spaced-apart arms mounted on said second frame for movement therewith, a chase pivotally mounted beneath said arms and positioned over said work on said bed during printing a screen removably mounted on said chase, a carriage assembly mounted on each of said arms for movement therealong, a drive arm connected to each of said carriage assemblies, press drive means mounted on said second frame and operatively connected to each drive arm to drive each drive arm and thereby move each of said carriage assemblies in associated, reciprocal fashion along said arms, said press drive means including a power drive shaft rotatable about a central axis, said power drive shaft having a cam mounted for rotation therewith near one end thereof and linking means mounted on an opposite end thereof and operatively connecting said press drive means with said drive arms to pivot said drive arms relative to said first frame, the improvements including pivot points disposed on opposite sides of said first frame and
  • a printing press having a first fixed frame, a bed supported on said frame having an upwardly facing surface to receive work to be printed, a second frame mounted for pivotal movement on said first frame, a pair of spaced-apart arms mounted on said second frame for movement therewith, a chase pivotally mounted beneath said arms and positioned over said work on said bed during printing, a screen removably mounted on said chase, a carriage assembly mounted on each of said arms for movement therealong, a drive arm connected to each of said carriage assemblies, press drive means mounted on said second frame and operatively connected to each drive arm to drive each drive arm and thereby move each of said carriage assemblies in associated, reciprocal fashion along said arms, the improvements including pivot points disposed on opposite sides of said first frame and forming a horizontal axis about which said second frame is pivotally moved during a printing cycle, said pivot points disposed generally in the horizontal plane of said surface of said bed adjacent a rear edge of said surface and allowing a rear portion of said second frame on which said press drive means is mounted to be sw
  • a printing press including a first fixed frame, a bed supported on said frame and having an upwardly facing surface to receive work to be printed, a second frame pivotally mounted on said first frame, a pair of spaced-apart arms mounted on said second frame for pivotal movement therewith toward and away from said bed, a chase pivotally mounted beneath said arms and positioned over said work on said bed during printing, a screen removably mounted on said chase, a carriage assembly mounted on each of said arms for movement therealong, each of said carriage assemblies having a carriage housing supported on said arm, parallelogram means pivotally mounted on each carriage housing for supporting a squeegee and a flood bar in associated relationship for pivoting movement relative to each other, a free sliding shuttle contained in each carriage housing and movable with respect thereto, said shuttle operatively connected to said parallelogram means to pivot said parallelogram means to shift said squeegee and said flood bar generally vertically with respect to one another upon movement of said shuttle relative to said carriage housing, drive arms pivotally mounted on said first frame and connected to each of

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  • Mechanical Engineering (AREA)
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US299689A 1972-10-24 1972-10-24 Screen printing press Expired - Lifetime US3859917A (en)

Priority Applications (8)

Application Number Priority Date Filing Date Title
US299689A US3859917A (en) 1972-10-24 1972-10-24 Screen printing press
CA183,252A CA1006046A (en) 1972-10-24 1973-10-12 Screen printing press
GB4861373A GB1435214A (en) 1972-10-24 1973-10-18 Screen printing press
ES419864A ES419864A1 (es) 1972-10-24 1973-10-23 Una disposicion de prensa de impresion.
FR7337872A FR2203710B1 (en:Method) 1972-10-24 1973-10-24
IT53330/73A IT1003548B (it) 1972-10-24 1973-10-24 Perfezionamento nelle macchine da stampa serigrafica
JP48119775A JPS49101111A (en:Method) 1972-10-24 1973-10-24
AU61758/73A AU480676B2 (en) 1972-10-24 1973-10-24 Screen printing press

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US299689A US3859917A (en) 1972-10-24 1972-10-24 Screen printing press

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US3859917A true US3859917A (en) 1975-01-14

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US299689A Expired - Lifetime US3859917A (en) 1972-10-24 1972-10-24 Screen printing press

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US (1) US3859917A (en:Method)
JP (1) JPS49101111A (en:Method)
CA (1) CA1006046A (en:Method)
ES (1) ES419864A1 (en:Method)
FR (1) FR2203710B1 (en:Method)
GB (1) GB1435214A (en:Method)
IT (1) IT1003548B (en:Method)

Cited By (21)

* Cited by examiner, † Cited by third party
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US4111118A (en) * 1976-09-07 1978-09-05 American Screen Printing Equipment Co. Multi-purpose screen printing machine
US4254707A (en) * 1979-05-02 1981-03-10 Itron, Inc. Screen printing apparatus with screen peel-off from work
US4276826A (en) * 1980-02-06 1981-07-07 American Screen Printing Equipment Company Squeegee and flood bar actuator
US4493254A (en) * 1983-10-31 1985-01-15 Lawson Printing Machines Company, Inc. Screen printing machine and drive system therefor
US4524687A (en) * 1982-10-26 1985-06-25 American Screen Printing Equipment Company Adjustable carriage drive mechanism
US4537126A (en) * 1982-10-26 1985-08-27 American Screen Printing Equipment Co. Automatic peel control mechanism
USD281510S (en) 1982-10-26 1985-11-26 American Screen Printing Company Screen printing press
US4628814A (en) * 1983-09-23 1986-12-16 Gerhard Klemm Flat screen printing machine
US4724761A (en) * 1986-05-16 1988-02-16 American Screen Printing Equipment Company Solvent guard system
US4729306A (en) * 1986-05-16 1988-03-08 American Screen Printing Equipment Company Screen seal system
US4817523A (en) * 1986-10-20 1989-04-04 Harco Graphic Products, Inc. Flat bed screen printing press
US4854229A (en) * 1987-06-10 1989-08-08 E. I. Dupont De Nemours And Company Screen printer apparatus
US4903594A (en) * 1987-05-27 1990-02-27 C.M.S. S.R.L. Drive arrangement for knives in silk-screen printing machines
US4972773A (en) * 1989-12-19 1990-11-27 Barlow Walter T Registration system for silk screen equipment
US5275098A (en) * 1990-03-13 1994-01-04 Larson James D Portable screen printing device
US5315929A (en) * 1992-09-04 1994-05-31 Sundqvist James W Fine adjustment mechanism for screen printing machines
US5651309A (en) * 1995-10-24 1997-07-29 A.W.T. World Trade, Inc. Peel control means for off-contact screen printing press
GB2356599A (en) * 1999-11-23 2001-05-30 Aldridge Plastics Ltd Screen printing apparatus
US20050252394A1 (en) * 2004-05-14 2005-11-17 Reefdale Pty Ltd Screen printer print arm
US20070272102A1 (en) * 2006-05-26 2007-11-29 Atma Champ Enterprise Corporation Two-bar linkage fast elevating apparatus for screen printing machine
US20180370219A1 (en) * 2015-12-18 2018-12-27 Ktk Lda Print station with a screen frame elevation mechanism and screen printing machine thereof

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JPS55148484A (en) * 1979-05-07 1980-11-19 Sony Corp Device for coating resin on printed board
CN114230376B (zh) * 2022-01-11 2023-06-23 成都成维精密机械制造有限公司 陶瓷表面均匀涂覆复合钎料的方法、工装块

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US1840073A (en) * 1926-11-19 1932-01-05 Edward J Henle Stencil printing mechanism
US1898406A (en) * 1930-01-06 1933-02-21 Lionel C Tate Silk screen printing machine
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US2963964A (en) * 1958-07-22 1960-12-13 Master Screen Printing Equipme Automatic silk screen printing machine
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US3605614A (en) * 1969-05-09 1971-09-20 Graphic Equipment Of Boston In Work support with interchangeable closure and sheet removal means
US3731623A (en) * 1970-10-26 1973-05-08 American Screen Process Equip Glider press

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US1840073A (en) * 1926-11-19 1932-01-05 Edward J Henle Stencil printing mechanism
US1821302A (en) * 1927-07-01 1931-09-01 Firm Pluschweberei Grefrath Ag Apparatus for printing colored patterns on plush fabrics or the like
US1898406A (en) * 1930-01-06 1933-02-21 Lionel C Tate Silk screen printing machine
US2018989A (en) * 1934-04-16 1935-10-29 Ceramic Process Company Apparatus for applying pigments to surfaces
US2709404A (en) * 1951-01-23 1955-05-31 Stokes John Heyward Stencil printing machine
US2704510A (en) * 1952-07-05 1955-03-22 Eugene Landesman Screen printing machines
US2739530A (en) * 1953-01-22 1956-03-27 Marler E T Ltd Screen stencil-printing machines
US2991711A (en) * 1954-09-24 1961-07-11 Frank Sche Eisenwerke Ag Fully automatic silk-screen printing machine
US2936705A (en) * 1955-05-13 1960-05-17 Pace Mfg Co Silk screen printing press
US2894451A (en) * 1956-09-04 1959-07-14 Landesman Eugene Screen printing machine
US2975705A (en) * 1958-02-12 1961-03-21 Gilman Louis Silk screen process press
US2963964A (en) * 1958-07-22 1960-12-13 Master Screen Printing Equipme Automatic silk screen printing machine
US3605614A (en) * 1969-05-09 1971-09-20 Graphic Equipment Of Boston In Work support with interchangeable closure and sheet removal means
US3731623A (en) * 1970-10-26 1973-05-08 American Screen Process Equip Glider press

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4111118A (en) * 1976-09-07 1978-09-05 American Screen Printing Equipment Co. Multi-purpose screen printing machine
US4254707A (en) * 1979-05-02 1981-03-10 Itron, Inc. Screen printing apparatus with screen peel-off from work
US4276826A (en) * 1980-02-06 1981-07-07 American Screen Printing Equipment Company Squeegee and flood bar actuator
US4524687A (en) * 1982-10-26 1985-06-25 American Screen Printing Equipment Company Adjustable carriage drive mechanism
US4537126A (en) * 1982-10-26 1985-08-27 American Screen Printing Equipment Co. Automatic peel control mechanism
USD281510S (en) 1982-10-26 1985-11-26 American Screen Printing Company Screen printing press
US4628814A (en) * 1983-09-23 1986-12-16 Gerhard Klemm Flat screen printing machine
US4493254A (en) * 1983-10-31 1985-01-15 Lawson Printing Machines Company, Inc. Screen printing machine and drive system therefor
US4724761A (en) * 1986-05-16 1988-02-16 American Screen Printing Equipment Company Solvent guard system
US4729306A (en) * 1986-05-16 1988-03-08 American Screen Printing Equipment Company Screen seal system
US4817523A (en) * 1986-10-20 1989-04-04 Harco Graphic Products, Inc. Flat bed screen printing press
US4903594A (en) * 1987-05-27 1990-02-27 C.M.S. S.R.L. Drive arrangement for knives in silk-screen printing machines
US4854229A (en) * 1987-06-10 1989-08-08 E. I. Dupont De Nemours And Company Screen printer apparatus
US4972773A (en) * 1989-12-19 1990-11-27 Barlow Walter T Registration system for silk screen equipment
US5275098A (en) * 1990-03-13 1994-01-04 Larson James D Portable screen printing device
US5315929A (en) * 1992-09-04 1994-05-31 Sundqvist James W Fine adjustment mechanism for screen printing machines
US5651309A (en) * 1995-10-24 1997-07-29 A.W.T. World Trade, Inc. Peel control means for off-contact screen printing press
GB2356599A (en) * 1999-11-23 2001-05-30 Aldridge Plastics Ltd Screen printing apparatus
GB2356599B (en) * 1999-11-23 2003-11-05 Aldridge Plastics Ltd Screen printing apparatus
US20050252394A1 (en) * 2004-05-14 2005-11-17 Reefdale Pty Ltd Screen printer print arm
US7441499B2 (en) * 2004-05-14 2008-10-28 Reefdale Pty Ltd Screen printer print arm
US20070272102A1 (en) * 2006-05-26 2007-11-29 Atma Champ Enterprise Corporation Two-bar linkage fast elevating apparatus for screen printing machine
US7337718B2 (en) * 2006-05-26 2008-03-04 Atma Champ Enterprise Corporation Two-bar linkage fast elevating apparatus for screen printing machine
US20180370219A1 (en) * 2015-12-18 2018-12-27 Ktk Lda Print station with a screen frame elevation mechanism and screen printing machine thereof

Also Published As

Publication number Publication date
ES419864A1 (es) 1976-07-01
AU6175873A (en) 1975-04-24
JPS49101111A (en:Method) 1974-09-25
FR2203710B1 (en:Method) 1979-08-03
FR2203710A1 (en:Method) 1974-05-17
CA1006046A (en) 1977-03-01
IT1003548B (it) 1976-06-10
GB1435214A (en) 1976-05-12

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