US2393402A

US2393402A - Flat-bed duplicator

Info

Publication number: US2393402A
Application number: US499806A
Authority: US
Inventors: William F O'gorman
Original assignee: Individual
Current assignee: Individual
Priority date: 1943-08-24
Filing date: 1943-08-24
Publication date: 1946-01-22
Anticipated expiration: 1963-01-22

Description

Jan. 22, 1946. w. FI oGoRMAN FLAT BED DUPLICA'IOR Filed Aug. 24, 1943 3 Sheets-Sheet 1 A TMm/ EY W. F. oGoRMAN- FLAT BED DUPLICATOR l Jan. 22, 1,946.

Filed Aug. 24, r194s 5 Sheets-Sheet 2 ATTORNEY w. F. QAGORMAN 2,393,402

FLAT BED DUPLICATOR Filed Aug. 24, 194s s sheets-sheet s Jan. 22, 1946.

ATTORNEY Patented Jan. Z2, 1 946 '1LT' v,2,.,93-,4 0 2 i FLAT-BED gDUPLICAToR y f Y Willani F. OGormam'New YorkQN. 2 Application Auguste@ 1943,'seria1Ne-f-49asos; 1o claims. ,(YclQloil-ize) My invention relates to a flat bed duplicator and its object is to provide a simple, inexpensive device for making copies from standard stencil sheets. Another object is to provide a hand operated machine of. light weight Ywhich occupies but little space and is easily transported. These and'other objects of the invention will appear in the following specification in which a preferred embodiment of .my invention is described, the

novel features of ,which areset forthin the apy pended claims.- v

lReferring to the drawings: Y j

Figure l is a plan View of a duplicator which is made according to and embodies my invention;

Fig. 2 is a side elevation and Fig. 3 a fronty View of the device shown in Fig. 1

Fig. 4 is a plan and Fig. 5 Va front elevation of the ap 20 by astrap hinge 3-I on a line spaced from andparallelwith the hinge 2|.V rThe part ofthe, flap 'which extends back of thehinge v3l a .pad which is apart of the device shown in the preceding figures; Y

Fig. 6 is a side elevation, partly in section and on -a larger scale, of one part of the device;

f Figs. 7, 8, and 9 are side-elevations,'partly in section, of parts of; the device illustrating the way it is used.

Fig. 10 is a plan view ofthe inking pad with some of its parts broken away to show the construction; Y f

Fig. 11 is an enlarged section of the ink pad on Vthe line lI--Il of Fgr.,10. Y

I0 designates a at rectangular base with supporting buttons VI linear its corners. has a transverse flangev I2 across its front end which is somewhat higher than its longitudinal edge I3. I4 is as-lat portion at the rearend of thebase which is slightlyV lower than the sides i3. Between the rearedge of the ilangelZ and the front edge of the portion I4 and betweenthe sides I3 the base is depressed te form a well I5. Ihis forms a .clearance for the inking pad.36 and stencil when the device is'not in use and forms a receptacle for a removable at resilient'platen pad I6 (Figs/4 and 5) when the devicer is in use. 2D is a flap, preferablyformed of sheet metal, pivotally connected to the rear end of the base by a strap hinge 2I. This extends over the pcr-v tion I4 of the base. Its front end extends over the rear end of the platen pad and isbent back, as shown in the drawings and then downwardly toform a .flange y23 spaced fromvtheend 22 and somewhat shorter than the width ofthe Well I5 (see Fig. 1). This ange engagesv the rear endY of the platen padvand formsa guide for the paper to be printed as will be more fully described hereinafter. Y v

43i) is a atpresser plate pvotally connected to This base 4iorrrisa-heel 24 which is'arranged to be: engaged by the rear end 32' of the presser plate. 'Arow offguide screws 35, parallel with :the ,end 32;' and spaced therefromfis provided onthe; under Iside of the.v .presser-plate with clearances provided between their vheads andthe surface of the plate. An ink pad 36,. is securedto the under side ofythe presser plate by a frame 31' of meta-l yor'other suitable material-by screws 31A. .The construction of the ink pad is animportant feature of-,the invention. I. I "H i y Y Near the other end of the presser plate atrans- Vverse groove 3 8 is .formed into which vfitsfa spring clip 39 rwhich ispivoted at 39A .to thepresser -plate. A'stencil A is'madein the vusual wayv on atypewriter or with a stylus.l `YA standard'stencil has -a row ofi` keyhole slots near; one of: its ends;

The guider I screws., 3 5 are ,passed` through thse slots and the stencilstretched across-:thepad' y lwhich is previously inked.l The otherend. ofthe stencil isflaid over vthe groove 38 and-thefspring clip 39 insertedy in vthe groove with the stencil in;`

terposed The device isthenready-forusef. It

may `be .closedy and` Akept until ready `for .use with the ink; pad andgstencill protected by. the sides .ofthewel1l4., a

, fWhen the-presser plateis raised to lthe position in which it is shown in Fig. 7, its end. 32 engages the heel 24 of the flap and raises the part of the flapin vfront! ofzthe hingeZI. The platen pad IIl is then `inserted inthe well --I5,. Raisingthe Dresser pla-te to :a substantially vertical position, as shownin Fig. 8,allows the flap -t0..de' scend until its end 22 rests on ',theplaten pad. There will then be a space betweenthe end 22.o fthe Vflap Vand the top of the platen pad yof `sufficient endl 22 ofthe flap ontothe-papenB and thus preveritthe4 pad and the paper lfrom'slipping. It

may .be seen from Fig. `9v that the initialcontact ofthe stencil with the paperB' is at the rear por- .tion 'of 't he .platen pad. It will lbe.linderstoQd. that the -presser plate is moved manually, and

that its movement is continued compressing "the platen paduntil the wholesurface of thestencil has, been r,brt'lughi-,- .into contact with the paper. Thepresser' plate is then raised quicklytothe Fig. 8 position, the printed paper removed, a fresh sheet of paper inserted and the operation repeated. The front end of the presser plate is pushed downwardly to compress the platen pad more than it is compressed at its rear hinged end and so that the pressure on the paper at the front end of the press is greater lout for a shorter period of time than it is at the other end.

The inking pad 36 as shown in Figs. 10 and 11 comprises a solid thin flat plate 40 of sheet metal or other suitable material on which is superposed a perforated rigid fibre plate 4| of,

-sill: or the like and the frame 31 Which is U- shaped clamps its edges to the plate 40.

The function of this novel vinking pad is important for ilat printing. Ink is 'placed on the outer layer 46 as evenly as possible and permeates it and the soft layer 415 immediately under it. When this inked pad is brought into contact with a stencil A some of the ink will be forced through the openings in the stencil onto the paper B. A :greater part of the ink will be forced through the perforated sheets 43, which diffuses it laterally into the cells formedl in the plate 4I by theperforations 42 therein, backed by the plate 40. 'These perforation's form a plurality of minute reservoirs for holding surplus ink which isV fed back through the

sheets

43, 43 and the layers v45, 46 during Vsubsequent impressions so that a large number of impressions may be made with Ione inking.

This simple device is capable of making thousands of copies from a 4stencil with a single'inking of the pad 36. It occupies but little space, and is light and easily transported. `I realized that 'the modiiications in the construction land arrangement of the parts'may be made'within the spirit and scope of the invention and intend no limitations other than those imposed by the following claims.

What is `claimed is:

`1. A lduplicator comprising a `ilat base with upstanding edges forming a well, a presser plate pivotally connected with the base near the rear end of the base, an ink pad secured to the presser plate arranged to fit with clearance between vsaid edges, means for attaching astencil to the presser plate over the ink pad, and 'a removable platen pad arranged'to be placed insaid well.

l2. A-duplicator comprising a at'base with upstanding edges forming a well, a presser plate pivotally `connected with the base vnear the rear end ofthe base, an inkr pad secured to the presser plate arranged to't with clearance vbetween said edges, means for attaching 'a stencilto the presser plate over Vthe ink pad, .said 'presser plate being movable `to and from a position spaced from and approximately parallel with the base, and a removable platen pad arranged to be placed in said well.

'3. A duplicator comprising anat base with upstanding edges forming a well, a presser plate pivotally yconnected 'with the .base near the rear end o'f the base, an ink pad secured'tothe presser plate arranged to fit with clearance between said edges, and means for attaching a stencil to the presser plate over the ink pad, said presser plate being movable into a position spaced from and approximately parallel with the base, a removable resilient platen pad arranged to be placed in said well the thickness of the platen pad being greater than the distance from the bottom of the well to the ink pad when the presser plate is in said approximate parallelism with the base.

, 4. Aduplicator comprising a ilat base, a platen pad, a flap pivotally attached to the rear end of the base having a part extending over the rear end of the platen pad, a, presser plate pivotally attached to the ilap intermediate the pivotal attachment of the flap to the base and said extending part of the flap, an ink pad secured to the presser plate and means for attaching a stencil to the presser plate over the ink pad to the flap, and the part of the flap back of said pivotedattachment extending beyond the rear edge of the :presser plate and arranged to be engaged thereby,

5. A duplicator lcomprising Aa. iiat base, a vplaten. pad, a flap-pivotally attached to the rear end of the base, a ,presser A.plate pivotally attached tothe flap in front yof the pivotal attachment of the flap to the base, said ilap having a downwardly extending ange arranged to engage the platen pad and to form a paper guide.

6, A duplicator comprising a at base with upstanding edges forming Aa well, a flap pivotally attached tothe rear end of the base, a presser -plate pivotally attached lto the flap Iarranged to t with clearance between said edges, an ink pad securedto the presserplate and means for attaching a stencil tothe presser plate over the `inll: pad, said presser plate being movable into a position spaced from and approximately parallel with the base, a removable resilient platen pad arranged to b e :placed 'in said Well, the thickness of the platen pad being greater than the distance 'from the bottom` of the `well to the in'k pad when the presser plate is in said approximate parallelism with the base.

7. A duplicator comprising a nat base with upstanding edges forming a well, a flap pivotally attached to the rear end oi the base, a presser platen pivotally attached -to the `ilap in front of the pivotal attachment of the flap to the base, an ink pad secured to the presser plate arranged to t with clearance between said edges and means forattaching a stencil to the presser plate over the ink pad, the part of the flap in front of the pivotal attachment thereof to the base extending over the rear end of the yplaten pad and the part of the vpad back of said pivotal attachment extending beyond the rear edge of the presser plate and arranged to be engaged thereby, said presser plate being movable into a position spaced from and approximately parallel with the base, the outer dimensions ofthe ink pad being less than the inner dimensions of the well, a `removable platen pad arranged to be lplaced in said Well, the'thickness of the platen gpad being greater than the distance from the bottom of the well tothe ink pad when the presser plate is in said approximateparallelism with the base.

8. A duplicator comprising a'flat base with upstanding edges forming a well, a flap pivotally attached to the rear end of the base, a presser platen pivotally attached to the ap in front of the pivotal attachment of the flap to the Aibase. an ink pad secured to the presser plate arranged to fit Vwith clearance between saidl edges, and

means for attaching a stencil to the presser plate over the ink pad, a removable resilient platen pad arranged tobe placed in said well, the part of the flap i-n front of the pivotal attachment thereof to the base extending over the rear end of the platen pad and the part of the pad back of said pivotal attachment extending beyond the rear edge of the presser plate and arranged to be engaged thereby, said flap having a downwardly extending flange arranged to engage the platen pad and toform a paper guide.

9. A duplicator comprising a at base with ulpstanding edges forming a well, a presser plate pivotally connected with the base near the rear end of the base, an ink pad secured to the presser plate arranged to t with clearance between said edges, a removable platen pad arranged to be placed in said Well, said ink pad comprising a flat imperforate plate, a at perforate plate of material thickness thereon constructed to form a plurality of ink receiving cells and an outer layer of xpermeable sheet material.

10. A duplicator comprising aflat base with f upstanding edges forming a Well, a presser plate pivotally connected with the base near the rear end of the base, an ink pad secured to the presser plate arranged to fit with clearance between said edges, a removable platen pad arranged Ito be placed in said well, said ink `'pad comprising a flat imperforate plate, a flat lperforate plate of material thickness thereon constructed to form a plurality of ink receiving cells, a thin perforated differing sheet, a soft permeable bed layer, and a thin outer layer of permeable sheet material.

WILLIAM F. OGORMAN.