US1777920A - Duplicator - Google Patents

Description

Oct. 7, 1930.

s. HORN ,7

Uct. 7, 1930.

s. HORII 1,777,920

DUPLICA'IOB Filed June 26, 1929 2 Sheets'Sheet 2 *umT i m s it the thickness ofthe layer of papers placed on a ion of the spring 12.

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Passed (Detainee p s-: V r 1 777 920;

"srrmarnononri, onaoKYo, JAFAN nUPLioi-vron Application filedaune 2e, IQZBQSeriaI No. 373396, and in Japan July}, 1928,

' This invention relates toaduplicator, more in locking plate 7 is "formed acain slot is particularly to a flat duplicator ofthe type 9*open at one end in which the trunnion 6' in which a stencil stretching frame is swing on the stencil stretching frame 4. is posi-I ably connected at one fend toa bed of the tioned, whereby the trunnion 6 is locked duplicator. V i against the upward 1nove1nentwhen the 551 One object oi the invention is to provide frame t is in its'lowered or printing position. duplicator of this type in which the stencil Fixed on each of the supporting plates'e is" stretching frame can he readily relnoved a pin or roller 10 which is adapted to cofrom the bed without handling any part for p rate t a a 11 .eXtenclillg f wardly 10 disconnecting the same. i 3 from the locking plate 7. A spring 12 is pro Another object of theinvention is to 'provided whioh tends normally to rotate the: vide a duplicator in which the position of ocking; platetrearwardly. A stop 13 is trunnionson the stencil stretching frame are! secured to the bracket 2 for limiting the 10-3 V automatically adjustedin accordance with tation of the looking plate 7v caused bythe i i thehed when the stencil stretching frame is For vthe sake of sinipleness l g lowered into a printing position. ment of the parts has been described/with linfl o a yl d i I reference to only one side of the duplicator, Fig. 1 is a side elevationof a dupli at but it isto be understood that the deviceon Liaccording to this invention Fig. Qis'a plan thereof; I y Nhen the stencilstretching frame; 4 is v 3 s an enlafgecliyiew f th rea swung upwardly allowing thelocliing plate tionjof th duplicat shown in Fi 1, hm 'Z' to be rotated reai'w: rdly, shmvn-in Fi in this case with. the'stencil stretching frame RTE ,Y 6 1 m l iw fi;

I released from the calnslot 9 andit may he i Fig. 4 isa side elevationot' the rear porti reinoyed therefrom." Thus, it will he seen, of a slightly modified construction according the Stencil stretchingframe G a ilyto this invention; a a disconnectedwithout necessitating handling Fig. 5 is:a viewsiinilar to Fig; 4, butshowof ny P 0 C isc0nnectiont 1 i a g theposition f parts when considerable the d p t d Q e ovee h :5?

number of papers are placed on the bed of U- 11 3 6 of n il re hi frame the duplicator; 1 a a a if? fi iP l v l 101 2 t V i LQ t '3 6 is 'a section taken on line VI-VI -1 s ,t $1013 9 is adapted to lylillriace V the trunnion 6st different heights, it willloe {zi Fig. 7 is a planet Fig. 4t, but with the ste i seen that whenfthe stencil stretching frame 851i 01, Each of said hracketsZ has a vertical In H16 C0Il$tr1l 3l3iOI1 S w cilstretching; frame removed. 4 its Pressed down 7150 e P i Il i l R f i t th d wi 1 i b d f always assume automatically adjHstedpothe duplicator and is provided with brackets Slt103$ a c g; 0 e thickness of y 'r' 2 secured on both sides at the rear end there- 0? papers Placed on e bed 1- a y a y 3 y Y inFi'gures 1 to open slot 3. 4 is a stencil stretching frame number o fp g P 1 6 7 which Callv b and is provided with supporting plates 51 1 F bed 1 h t i s y secured thereto on both sides. Said suphlndmIlCe 1S determined by hQrz y v porting 5 carr trunnions 6 are Of CELIILSlQlJ In the SllOWIl in the brackets 2, so that the stencil stretchab in'git to place more i ea d br ing frame 4 is swingably' connected to the printingpapers on the bedrl and forattain bed 1. ing more soft and reliable operation; The

At each side of thebed 1, a locking plate pivot 8 of the locking plate 7 ,instead of be-' i i so 7 i otatably mounted by means of a pivot- 8. ing securely fixed to the bracket 25 is in this 9 ur OFFICE". 1

the opposite side issiinilarly constructed. 7

' slidably mounted in the said bearing slots 3 i Figu s 7,I116\I1S iS p d 1 11-.

instance slidably mounted in a vertical slot 20 which is formed in the bracket 2, and said pivot 8 is normally pressed downwardly by the action of a spring 21 which is connected at one end to said pivot 8 and at the other end to pins 22 and 23 secured to the body of the bed 1. Other parts are almost identical to those shown in Figures 1 to 8.

In the construction shown in Figures 4 to 7, it will be noted that when the stencil stretching frame 4 is pressed down the locking plate 7 itself can vertically slide, so that the positions of the trunnion 6 will be automatically adjusted within a wider limit according to the thickness of the layer of papers placed on the bed 1. In this construction, in view of the provision of means for automatically raising and lowering the locking plate 7, it is obvious that the slot 9 is not always necessary to be eccentrically shaped, but also it may consist merely of an arc shaped slot concentric to the axis of the pivot 8.

In the constructions shown the spring 12 tends to normally rotate the locking plat '4' rearwardly, and thereby also to springly lift the stencil stretching frame 4. If neces sary, in order to help said spring 12, an additional spring may be employed on one side of the duplicator or on both sides.

What I claim is:

1. A flat duplicator comprising a bed, a stencil stretching fame having trunnions, brackets secured to said bed and each having a bearing slot open at the upper end being adapted to receive said trunnions on the stencil stretching frame, and locking plates rotatably mounted upon the said bracket and having means for embracing said trunnions in the bearing slots in an automatically adjusted position when the stencil stretching frame is in its closed or printing position and for releasing said trunnions when the .stencil stretching frame is lifted.

2. A flat duplicator as set forth in claim 1, wherein each of the locking plates is provided with a cam slot open at one end, and adapted to engage with the trunnions on the stencil stretching frame, and also provided with a forwardly extending arm adapted to be pressed by a pin or roller on the stencil stretching frame when the latter is lowered.

3. A. fiat duplicator as set forth in claim 1, wherein the locking plates are vertically movably mounted upon the bed.

4. A flat duplicator as set forth in claim 1 wherein the locking plates are normally pressed downwardly by springs.

5. A flat duplicator as set forth in claim 1, wherein each of the locking plates is provided with an are shaped slot concentric to the axis of rotation of the locking plate, the latter being vertically slidably mounted to the-bed.

6. A flat duplicator comprising a bed, a

stencil stretching frame having trunnions, brackets secured to said bed and each having a bearing slot open at the upper end being adapted to receive said trunnions on the stencil stretching frame, and locking plates rotatably mounted upon the said bracket and having means for embracing said trunnions in the bearing slots in an automatically adjusted position when the stencil stretching frame is in its closed or printing position and for releasing said trunnions when the stencil stretching frame is lifted, each of the locking plates being provided with a cam slot open at one end, and adapted to engage with the trunnions on the stencil stretching frame, and also provided with a forwardly extending arm adapted to be pressed by a pin or roller on the stencil stretching frame when the latter is lowered, a d wherein the locking plates are vertically movably mounted upon the bed.

7. A flat duplicator comprising a bed, a stencil stretching frame having trunnions, brackets secured to said bed and each having a bearing slot open at the upper end being adapted to receive said trunnions on the stencil stretching frame, and locking plates rotatably mounted upon the said bracket and having means for embracing said trunnions in the bearing slots in an automatically adjusted position when the stencil stretching frame is in its closed or printing position and for releasing said trunnions when the stencil stretching frame is lifted, each of the locking plates being provided with a cam slot open at one end, and adapted to engage with the trunnions on the stencil stretching frame, and also provided with a forwardly extending arm adapted to be pressed by a pin or roller on the stencil stretching frame when the latter is lowered, and wherein the locking plates are normally pressed downwardly by springs.

In testimony whereof I aflix my signature.

SHIN J IRO HORII.

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