US1949944A

US1949944A - Feed guide for platen presses

Info

Publication number: US1949944A
Application number: US618743A
Authority: US
Inventors: George G Schierholz
Original assignee: Individual
Current assignee: Individual
Priority date: 1932-06-22
Filing date: 1932-06-22
Publication date: 1934-03-06
Anticipated expiration: 1951-03-06

Description

March 6, 1934. G. 5. SCHIERHOLZ 1,949,944

FEEQD GUIDE FOR PLATEN PRESSES Filed June 22. 1932 AlIlIlll l 1 IN VEN TOR. 650/265 6. SCH/EEHOLZ ATTORNEYS.

Patented Mar. 6, 1934 w UNITED STATES ?ATENT QFFICE 1,949,944 FEED GUIDE FOR PLATEN PRESSES George G. Sohierholz, El Cajon, Calif. Application June 22, 1932, Serial No. 618,743 12 Claims. (01. 101-415) This invention relates to and has for a purwhich is adapted to be struck by the sheets being pose the provision of a feed guide structurally fed, so as to limit the movement of and properly characterized in a mann r to enable it to be position the sheets on the platen. rigidly secured to the top or draw sheet of a From the upper edge of the projection 12 explaten packing against any and all displacetends an arm 14 which overlies the plate in ments by the action of sheets or cards of any spaced parallel relation thereto and is rigidly weight dropping against the gaging or stop surconnected intermediate its ends to the plate by face of the guide as the sheets are being fed, to a rivet 15. The free extremity of the arm termithe end of promoting accurate register of the nates at a location substantially central of the 10 sheets and preventing spoiling of the work as plate, and the arm functions as an abutment 66 a result of shifting of the guide from its adjusted in a manner to be later described. position, all while preventing any drag upon, or The opposite end portions of the plate 10 are resistance to, the movement of the sheets as they provided with flat gripping surfaces 16-16 which strike and slide across the gaging surface. may if desired be roughened in any suitable man- It is a further purpose of this invention to proner. The plate 10 is further provided with spaced vide a feed guide which is readily applied to the

openings

17 and 18, (Figure 7), and the material draw sheet and is easily adjusted and clamped of the plate is downstruck and upstruck at 19 and rigidly in a fixed position on the draw sheet 20, respectively, to receive and guide a spring against displacement under the most severe sertongue 21 which is passed through these openings 0 vice conditions, all while affording the desirable and also through an opening 22 (Figure 7) in the qualities of structural simplicity, compactness projection 12 to extend in advance of the gaging and inexpensiveness of manufacture. surface 13 for the purpose of confining a sheet Only one form of the invention will be deagainst upward displacement from the gaging scribed, following which the novel features theresurface upon striking the latter.

25 of will be pointed out in claims. The opposite ends of the projection 12 are ex- In the accompanying drawing, tended and bent at a right angle thereto so as to Figure l is a view showing in plan one form 01 provide tabs 23-23 having semi-circular notches feed guide embodying this invention, secured to 24 loosely receiving trunnions 25-25 on one edge a draw sheet; of the upper plate 11 projecting into a recess 26 30 Figure 2 is a view similar to Figure l and illusin the latter which is of sufiicient size to freely 86 trating the manner in which the feed guide is receive the arm 14 of the plate 10 when the plates to be applied to the draw sheet; are moved to closed position. It will be clear that Figure 3 is a vertical sectional view taken on the tabs 23-23 form bearings and co-aet with the line 3-3 of Figure 1, with the feed guide in the trunnions to hingedly connect the plates 10 5 closed position and clamped to the draw sheet; and 11 While permitting a relative lateral or ver- 90 Figure 4 is a view sirnilar to Figure 3, but showtical movement of the plates as a result of the ing the feed guide in open position; vertical play of the trunnions in the notches 24. Figure 5 is a vertical sectional view taken on The end portions or" the upper plate 11 are pro the line 5-5 of Figure l, with the feed guide in vided with flat gripping surfaces 27-27 (Figure 40 closed position and clamped to the draw sheet; 8) which may be roughened in the manner of the Figure 6 is a View similar to Figure 5 but illusgripping surfaces 16-16, and confront the latter tratin a position of the feed guide prior to clampwhen the plates are closed, for co-action in ing same to the draw sheet; clamping portions of the draw sheet in a manner Figures '7 and 8 are perspective views, respecto be later described. It is to be noted that those 5 tively illustrating upper and lower clamping eleportions of the plate 11 forming the gripping surments embodied in the feed guide. faces 27 are oppositely inclined slightly from Referring specifically to the drawing, wherein their point of joinder with the plate to the free similar reference characters designate similar edges of the latter for flexing to a position parallel parts in each of the several views, invention with the gripping surfaces 16 when the plates 50 in its present embodiment comprises a pair of are clamped in closed position, all for the purclamping elements in the form of metal plates pose of effecting a uniform distribution of clamp- 10 and 11 of substantially rectangular outline. ing pressure over the areas of the co-acting grip- The lower plate 10 is bent along one edge to proping surfaces, as will be later more fully described. vide a lateral projection 12 which in the use of In order to rigidly clamp the guide to the draw the guide defines an upright gaging surface 13 sheet and secure the

plates

10 and 11 in closed air position, a cam 28 in the form of a metal dish having a segment of its periphery cut away at 29 and a handle 30 projecting radially therefrom is rotatably mounted on the plate 11 by means of a rivet 31. The location of the cam on the plate 11 is such that with the cam occupying the released position shown in broken lines in Figure l the cut away portion 29 of the cam will be directly opposite the free end of the arm 14 and will clear the latter so as to enable the upper plate 11 to be swung to open and closed positions with respect to the lower plate. The top surface of the cam is inclined circumferentially from a higlr.

level at the points 3232 (Figure l) to substantially a feather edge at the center of the cut away portion 29 so as to provide arcuate wedges 33-33, one or the other of which co-acts withthe arm 14 in forcing the plates together and securing them in closed position to rigidly secure the guide to the draw sheet.

In the use of the feed guide as above described, the draw sheet 34 on which is indicated a line 35 to which it is desired to feed the sheets is slit in=twoplacesat-the intended location for the feed guide. These slits are shown at 3636 in Figures land 2 and at a right angle to the feed line with. one endlof the slits extending a short distance across the feed line. The slits are spaced apart a distance approximately equal to the spacing apart of the gripping surfaces 16-16 and 27-27, and are of such length that with the plates occupying open-position, the lower plate 10 can'be inserted obliquely through one slit asshown in FigureZ and then inserted into the other slit, so that-withthe guide centered with respect to the slits; the central portion of the plate 10 will overliethe portionof the draw sheet between the slits, whereas the endportions of the plate hav-' ing the gripping surfaces l616 will underlie portions of' the draw sheet at the outer sides of the slits:

The feed guide is-now adjusted longitudinally of the slit untilthe gaging surface 131s in alinement with the feed'line 35, following which the upper -plate'11 is swung to c10sed'position,wherein its gripping surfaces 2'727 will overlie the aforementionedportions of the draw sheet at the outer sides of the slits. The cam 28 is now rotated to co-act with the arm 14 in exerting a clamping force at'a substantially central location relative to'thepl'ates, to cause the grippingsurfaces to coact in clamping the interposedportionsofthe draw sheet; Itis to be noted that due to the inclination of the outer end portions of the plate 11,

= as-shown in Figure 6, that the outer edges of the grippingsurfaces 27-27 will be the first to strike the underlying portion ofthe draw sheet at the poirr's'indicated at aa in this figure, and that as the clamping force is applied to the plates, the outer 'end 'portions of the plate 11 will'be caused to flex until the gripping surfaces 2'7-2'7' are parallelto'the gripping surfaces 16-16, so that all gripping surfaces bear flatwise and with uniform pressure against the interposed portions of the draw sheet. Bythis construction, the formation of fulcrums'at the points b-h in Figure 6, with theattendant failure of obtaining maximum clamping action, is avoided, the clamping pressure created at the central location on the plates being distributed uniformly over the areas of the gripping surfaces. The corners of the'plates can be curved very slightly towards the sides of the plates having. the gripping surfaces, so as to further aid in insuringa perfect clamping action as such slightly curved'corners will be caused to flatten out as the clamping force is applied by the cam.

As the gaging surface 13 extends from the underside of the lower plate 10, and thus in effect extends below the surface of the draw sheet, there is no possibility of a sheet or card as fed to the guide slipping under the lower plate or dragging at the end of the gaging surface. It will thus be manifest that the gaging surface offers no obstruction-to accurate feeding, and that in view of the large gripping surfaces and the manner in which they are related to the draw sheet as well as the manner in which clamping pressure is applied-to the gripping surfaces, that the guide willbe rigidly secured in its adjusted position against displacement in service, all while enabling the guide to be readily re-adjusted and removed as desired.

What is claimed is:

1. In a printing press, a draw sheet having two spaced apart slits substantially in parallelism; a feed guide comprising two' clamping elements: one of which isinsertedthrough the slits to overlie theportion of the. draw sheet between the slits andto underlieiportions of the draw sheet atthe'outer-sides of the slits; the other clamping element overlying the last mentioned' portions of the draw sheet; means defining a gaging surface on the guide; and'means for securingthe elements in clamping engagement with the last mentioned portions of the draw sheet sons to fixedly secure the guide to the draw sheet.

2; In a printing press, a draw sheet'havingtwo spaced-apart slits substantially in'parallelism; a feed guide comprising two clamping elements having gripping surfaces; one of the elements being inserted through the slits to overlie the portion-of the draw sheet between the slits, with the gripping surfaces of such element underlying'por tions of the-draw sheet'at opposite sides of the slits; the other clamping element having its gripping surfaces overlying the last mentioned portions of the draw sheet; means defining a gaging surface on the guide; securing means for exerting a clamping-force upon said'elements at a substantially central location thereof; and means whereby the clamping force is causedto be distributed uniformly over the areas of the gripping surfaces of the elements so as'to fixedlysecurethe guide to the draw sheet.

3. A feed guide for platen presses comprising a; pair of clamping elements each of which is provided with spaced apart gripping surfaces; securing means for exerting a clamping force upon the elements at a single and-substantially cen-- trol location between the gripping surfaces; means by which the clamping force is caused'to be distributed uniformly over the areas of the gripping surfaces; and means defining'a gaging surface on one of said elements.

4. A feed guide for platen presses comprising a pair of clamping elements each of which is provided with spaced apart gripping surfaces; an abutment on one of the clamping elements;- a cam on the other clamping element co-acting with the abutment to exert a clamping force upon the elements at a single and substantially central location between the elements; and means whereby the clamping force is caused to be distributed uniformly over the areas of the gripping surfaces.

5. A feed guide for platen presses comprising two clamping plates'having gripping surfaces at ably' connecting the plates to occupy an open position and a closed position wherein the gripping surfaces of one plate confront the gripping surfaces of the other plate; means for clamping the plates in closed position by exerting a force upon the plates at a location intermediate the gripping surfaces thereof; and means for effecting a uniform distribution of clamping pressure over the areas of the gripping surfaces.

6. A feed guide for platen presses comprising two clamping plates having gripping surfaces at opposite end portions thereof; means for movably connecting the plates to occupy an open position and a closed position wherein the gripping surfaces of one plate confront the gripping surfaces of the other plate; means for clamping the plates in closed position by exerting a force upon the plates at a location intermediate the gripping surfaces thereof; one of the plates having its gripping surfaces inclined for flexing to a position parallel with the gripping surfaces of the other plate to insure uniform distribution of clamping pressure over the areas of the gripping surfaces.

'7. A feed guide for platen presses comprising a lower clamping plate having spaced apart gripping surfaces and a laterally projecting gaging surface along an edge thereof and intermediate the gripping surfaces; an upper clamping plate hingedly connected to the lower clamping plate and having spaced apart gripping surfaces adapted to confront the gripping surfaces of the lower plate; and means intermediate the gripping surfaces of the plates by which the plates can be forced towards each other and retained in closed position to clamp portions of a draw sheet between the plates.

8. A feed guide for platen presses comprising a lower clamping plate having spaced apart gripping surfaces and a laterally projecting gaging surface along an edge thereof and intermediate the gripping surfaces; and upper clamping plate hingedly connected to the lower clamping plate and having spaced apart gripping surfaces adapted to confront the gripping surfaces of the lower plate; an abutment on the lower plate intermediate its gripping surfaces; and a cam on the upper plate adapted for co-action with the abutment at a substantially central location between the gripping surfaces of the plates in forcing the plates together and retaining them in closed position.

9. A feed guide for platen presses comprising a lower clamping plate having spaced apart gripping surfaces and a laterally projecting gaging surface along an edge thereof and intermediate the gripping surfaces; an upper clamping plate hingedly connected to the lower clamping plate and having spaced apart gripping surfaces adapted to confront the gripping surfaces of the lower plate; an arm overlying the lower plate in spaced relation thereto and constituting an abut ment; and a cam rotatably mounted on the upper plate for engagement with the abutment to coact therewith in forcing the plates towards each other and retaining them in closed position.

10. A feed guide for platen presses comprising a lower clamping plate having spaced apart gripping surfaces and a laterally projecting gaging surface along an edge thereof and intermediate the gripping surfaces; an upper clamping plate hingedly connected to the lower clamping plate and having spaced apart gripping surfaces adapted to confront the gripping surfaces of the lower plate; and means by which the plates can be forced toward each other and retained in closed position to clamp portions of a draw sheet between the plates, the upper plate having its gripping surfaces inclined in a manner to be flexed to a position parallel with the gripping surfaces of the lower plate when the plates are clamped together.

11. A feed guide for platen presses comprising two clamping elements one of which is adapted to be inserted through spaced apart slits in a draw sheet to underlie portions of the draw sheet at the outer sides of the slits, and the other of which is adapted to confront said one of the clamping elements and to overlie the draw sheet at said outer portions of the slits; means by which said elements are adapted to be secured in clamping engagement with the portions of the draw sheet at the outer sides of the slits; and means defining a gaging surface on the guide.

12. In a printing press, a draw sheet having spaced apart and substantially parallel slits; a clamping member underlying portions of the draw sheet at opposite sides of the slits; a second clamping member overlying said portions of the draw sheet; means for securing said members in clamping engagement with the aforementioned portions of the draw sheet; and means defining a gaging surface on the guide.

GEORGE G. SCI-IIERHOLZ.