US2038571A

US2038571A - Duplicating machine

Info

Publication number: US2038571A
Application number: US35112A
Authority: US
Inventors: Kelly Rowland Leigh
Original assignee: Ditto Inc
Current assignee: Ditto Inc
Priority date: 1935-08-07
Filing date: 1935-08-07
Publication date: 1936-04-28
Anticipated expiration: 1953-04-28

Description

April R. L. KELLY v DUELICATING MACHINE Filed Aug. 7, 1935 2 Sheets-Sheet l Q; M M a Q A rifi 28, 193. R. L. KELLY &

DUPLICATING MACHINE Filed Aug. 7; 1955 2 Sheets-Sheet 2- 152/67? 2 07 f0 12020720 leg'ji ielly Patented Apr. 28, 1936 DUPLIOATING MACHINE.

Rowland Leigh Kelly, Chicago, Ill., assignor to Ditto, Incorporated, a corporation of West Virginia Application August. 7, 1935, serial No. 55,112

10 Claims. (01. 101-133) I The invention relates to duplicating machines and is particularly adapted to .be embodied .in duplicating machines 0f the type shown and described in U. S. Letters Patent .No. 1,972,681 granted September .4, 1934 to James K. Duncan.

One form .of' the invention is embodied in a duplicating machine which'comprisesa bed plate over which :a hectograph band is stretched. A cover for .the machine comprises two sections, one of which has one end pivoted to the frame of themachine and the other of which is pivoted to one endof the first-mentionedsection. The second section carriesan impression or platenroller adjustablysecured to the section. Hinged .-.tothe frame is means for holding a plurality of copy sheets. Paper guiding means is provided on .the secondsection to guide .the copysheets to a position wherein the impression or platen aroller may-engage themand apply them to the hectograph band. The operator may withdraw the .copy sheets one by one tmanually .from the copy sheet holding.means'and'place:themin the paper guiding .means. The operator'accomplishes the feeding of copysheets with onehand while the other .handis employed :to reciprocate the impression or platenroller.

Qther objects and advantages will become apparentas the following detailed description progresses, reference being had to :the accompanying drawings,-wherein Fig. 1 is a planview of *azduplicating machine whichvembodies the invention.

Fig. 2 is a-section taken on:line -2--2 of .Fig. 1, the section being taken through one 'section'of a member'which-serves .as a closure member for the :duplicating machine and also as a means for holding the impression or platen roller.

:Fig. 3 is a section taken on line 33 of Fig. l, the closure memberxbeingshown-in=full lines in a partially opened position and in dotted lines in iamore. fully opened position, and

Fig.4 isa section taken on the same line as Fig. 3 but showing a closure .memberin its closedposition.

The duplicating mechanism ;per se isshown in more detail and is described more fully in U. S. Letters Patent No. 1,972,681. Briefly, the ma- :chine'comprises a-case-or box-like frame formed of side members l6 and M, an end member 12 provided with 'a handle 13 :and aspring clip I4, a removable end member 15 provided with a retainingclip 16 and a'base l-1.

The frame comprises a bed plate 22 extending between theside members 16 and II and terminating short of the end members I2 and I5. The

bed plateis-a-supportfor a hectograph or duplicating band 23 which-has itsends detachablysecured to spindles .25 journaled in .the side members l0 and J I. The spindles 25 have knurled wheels 26 whereby the operator imparts-rotation to the spindles .to .unwind the duplicating .band 23 from one spindle'and windit upon the other.

The cover for-theirameearriesan impression or -p1aten.roller"43-and.is formed of two sections 36 and 31, the section .36 being provided with .dependingflanges 38 whereby one end of the -.depending section .36 is pivoted to the frame by screws 39 which .pass through openings in the flanges 38 and are-screw-threaded into portions 40 formedintegral with the frame. 31 .is provided with depending flanges M and is hinged .as at 42 to the section'3'6. At'its free end, the section 31 carries the impressionor platen roller 43 which is journaled in depending lugs '44. The handles 45 are securedto the flanges 41, one of these handles 45 being grasped by the operator when the machine is operated.

The section 31 is provided adjacent its free end with a relativelylarge aperture 31a which is formed by. stamping a lip or paper guide downwardly from the material, preferably sheet metal, from which the section 31 is formed. The paper guide 56 is slightly dished as at "52 at its centerand is ,provided with spaced slots 53 extending transversely of the section 31. The slots 53 accommodate paper guides 54 which are flattened 'on'one side toform guiding edges for copy sheets and are held in adjusted positions'in the slots by nuts 55. To complete the hopper through which the :copy *sheets .are fed to the impression roller 43, a'guard 56 is secured to :thefreeend .of the section 31 and prevents the copy sheets from cominginto contact with :the upper part of the roller =43.

When the impression'or platen roller 43is-reciprocated over thebed plate 22, the sections 36 and 31 havea jack-knife action with the section 36 pivoting on the frame, while the section 31 pivots on the free endof thesection 36. To limit the spread operative position of the cover section when it is employed in a duplicating operation, links 51 are pivotally secured at58 to the flanges 4| and by means of inclined slots 60 and pins 6|, are connected operatively to the section 36. terminates in an ofise't portion or slot 62 which .forms a shoulder so that the :spread position of the sections is limited. However, -by actuation of the links 51, the pins 6| may be caused to enter the ofiset slots 6 2, whereupon the cover compris- The section It will be noted that each slot 66 ing the sections 36 and 31 can be elongated completely to form a closure means for the frame as shown in Figs. 1 and 4. With the sections 36 and 31 in the positions wherein they are shown in full lines in Fig. 3, the platen roller 43 is located on supporting blocks 63 pivoted at 64 to the frame. The blocks have a margin bar 65 secured. thereto.

The section 36 is provided with means for holding a stack of copy sheets which are shown in dotted lines at 10 in Fig. 3. This means comprises a bar bent to form an open-sided pocket 12 having an upper wall 13 and a bottom wall 74 as well as an end wall 15. It will be noted that the end wall 15 is not at right angles to the walls 13 and M which are preferably parallel to each other, the construction being such that when a stack of copy sheets are positioned as shown in dotted lines in Fig. 3, the forward ends thereof will be in staggered relationship so that they can be readily grasped and separated by the operator. The sides of the copy sheets are engaged by guide members 11 preferably formed from sheet metal, the guide members 11 having tapered tonguelike portions 18 which engage the upper side of the stack of copy sheets 10 and assist the wall 13 to hold the stack in place upon the section 36.

The pocket 13 is secured adiustably to the section 36 by a pin 19 which rides in a slot provided in the section 36, the pin 19 being in frictional engagement with the section 36 so that the pocket 13 will remain in positions in which it is adjusted by the operator. In a like manner, the paper guides TI are secured adjustably to the section 36 by pins 82 which ride in slots 83 formed in the section 36. The pins 82 also engage the section 36 frictionally and hold the paper guides 11 in the positions in which they are adjusted by the operator.

The machine is provided with means (not shown) holding the gelatin band in a stretched condition over the bed plate. The construction of this means as well as other construction of the improved machine is shown in detail in U. S. Letters Patent No. 1,972,681.

The operation of the improved duplicating machine is substantially as follows: The operator reciprocates the platen roller 43 by grasping one or both of the handles 45 and by pushing it or them back and forth. A collapsed position of the cover is shown in dotted lines in Fig. 3. At the beginning of each cycle of operations, the operator withdraws the top copy sheet 10 from the stack thereof carried by the section 36 and brings its forward edge forwardly and downwardly so that it passes between the paper guide 50 and the guard 56 to engage the margin bar 65 as illustrated in full lines in Fig. 3. The operator then reciprocates the platen roller 43 after which the copy sheet is removed from thehectograph band.

It has been discovered that by placing the copy sheet holding means upon the section 36 instead of upon the section 31, an extremely large saving of time is effected and the operator can perform the feeding operation with comparatively little effort.

While I have shown and described certain embodiments of my invention, it' is to be understood that it is capable of many modifications. Changes, therefore, in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claims, in which it is my intention to claim all novelty inherent in my invention as broadly as permissible, in view of the prior art.

I claim:

1. A duplicating machine comprising a bed plate, a member having one of its ends hinged adjacent one end of said bed plate, a second member pivoted to the first-mentioned member, impression means carried by said second member and adapted to be reciprocated over said bed plate, and means mounted on the first-mentioned member for holding a stack of copy sheets.

2. A duplicating machine comprising a bed plate, a cover for said bed plate formed of a plurality of sections, one of said sections being pivoted at one end adjacent said bed plate, another of said sections being pivoted to the firstmentioned section, impression means carried by said other section and adapted to be reciprocated over said bed, and means carried by the firstmentioned section for holding a stack of copy sheets.

3. A duplicating machine comprising a bed plate, a cover plate having one end pivoted adjacent one end of said bed plate, a second cover plate hinged to the free end of the first-mentioned cover plate, impression means carried by said second cover plate and adapted to be reciprocated over said bed, and means carried by the first-mentioned cover plate for holding a stack of copy sheets.

4. In a duplicating machine, a box-like frame, a bed plate carried by the frame and provided witha duplicating surface, a closure member for said box-like frame, said closure member comprising a section having one end pivoted to the frame and a second section pivoted to the firstmentioned section, a platen roller carried by said second section, and means carried by the first-mentioned section for holding a'stack of copy sheets.

5. A duplicating machine comprising a bed plate, a member having one of its ends hinged adjacent one end of said bed plate, a second mem ber pivoted to the first-mentioned member, impression means carried by said second member and adapted to be reciprocated over said bed plate, and means mounted on the first-mentioned member for holding a stack of copy sheets in staggered formation.

6. A duplicating machine comprising a bed 7 plate, a cover for said bed plate formed of a plurality of sections, one of said sections being pivoted at one end adjacent said bed plate, another of said sections being pivoted to the firstmentioned section, impression means carried by said other section and adapted to be reciprocated over said bed, and means carried by the firstmentioned section for holding a stack of copy sheets in staggered formation.

7. In a duplicating machine, a box-like frame, a bed plate carried by the frame and provided with a duplicating surface, a closure member for said box-like frame, said closure member comprising a section having one end pivoted to the frame and a second section pivoted to the firstmentioned section, a platen roller carried by said second section, and means carried by the firstmentioned section for holding a stack of copy sheets in staggered formation.

8. A duplicating machine comprising a bed plate, a member pivoted adjacent said bed plate, a second member pivoted to the first-mentioned member, a platen roller carried by the second member and adapted to be reciprocated over the bed plate, means carried by said second member the first-mentioned cover plate for holding a stack of copy sheets.

10. A duplicating machine comprising a bed plate, a member having one of its ends hinged adjacent one end of said bed plate, a second member pivoted to the first-mentioned member, impression means carried by said second member and adapted to be reciprocatecl over said bed plate, and means mounted on one of said members for holding a stack of copy sheets in stag- 10 gered formation.

ROWLAND LEIGH KELLY.