 by human hand before it is fed to the punching machine, with the result that work efficiency is reduced. To solve this problem, the upstream segment, e.g., copying industry requires very severe alignment accuracy of the loaded sheets. Improvement of alignment accuracy is urgently required at present.
To solve this problem of misalignment resulting from the loaded sheet being moved by the leading edge of the ejected paper according to the prior art, a retaining roller 121′ as a retaining means is provided at a central position along the width of the sheet between the ejection roller 3 and the upper surface of the tray 12 in such a way that it can be rotated and drive, as shown in FIG. 78.
The retaining roller 121′ is fixed at a specified position on the immovable member, and is kept in a light contact with the upper surface of the tray 12 (the top surface of the sheet when the sheet is loaded). When paper is loaded on the tray 12, even if the leading edge of the paper ejected on the tray 12 attempts to move the loaded paper, the loaded paper is exposed to the force opposite to the direction of ejection “a” while being pressed by the retaining roller 121′, and is kept pressed against the end fence 131.
The sheet S1 ejected from the ejection roller 3 onto the tray 12 in the manner mentioned above is held by the retaining roller 121′, and is pressed against the end fence 131. This eliminates the so-called vertical misalignment on the trailing edge in the direction of ejection a.
When the retaining roller 121′ is rotating in the arrow-marked direction as shown in FIG. 78, the retaining roller 121′ has also a function of returning the sheet to the side of the end fence 131. The roller in this case is referred to as a returning roller. As shown in FIG. 79, the returning roller 121′ is kept in a light contact with the top surface on the tray 12 and is driven in such a way as to move the contact surface toward the upstream side in the direction of ejection a, so the sheets fed onto the tray 12 whose trailing edges are gripped by the returning roller 121′ are returned opposite to the direction of ejection “a” and are pressed against the end fence 131.
The sheets S1 ejected by the ejection roller 3 and loaded on the tray 12 in the manner mentioned above are gripped by the returning roller 121′. Or those sheets which have been ejected slightly farther in the direction of ejection “a” than the returning roller 121′ are slid under its
by human hand before it is fed to the punching machine, with the result that workplace efficiency is reduce. To solve this problem, the upstream segment, for example, copying industry requires very hard alignment accuracy of the loaded sheet. Improvement of alignment accuracy is urgently required at present. 
 To clear this problem of misalignment resulting from the load sheet being moved by the leading edge of the ejected paper harmonize to the prior art, a retaining curler 121′ as a retaining means is leave at a central military position along the width of the sheet between the ejection roller 3 and the upper surface of the tray 12 in such a way that it can be rotate and drive, as shown in FIG. 78. 
 The retaining roller 121′ is fixed at a assign position on the immovable member, and is kept in a light contact with the upper surface of the tray 12 (the top surface of the sheet when the sheet is loaded). When composition is loaded on the tray 12, even if the leading boundary of the newspaper squirt on the tray 12 attempts to move the besotted paper, the loaded paper is exposed to the force out opposite to the direction of ejection “ a ” while being pressed by the retain roller 121′, and is kept pressed against the end fence 131. 
 The sail S1 ejected from the expulsion curler 3 onto the tray 12 in the manner mention above is held by the retaining roller 121′, and is press against the end fence 131. This eliminates the so - call vertical misalignment on the trailing edge in the direction of expulsion a. 
 When the retaining roller 121′ is rotating in the arrow - marked direction as read in FIG. 78, the retaining curler 121′ has also a function of returning the sail to the side of the end fence 131. The curler in this case is referred to as a returning roller. As shown in FIG. 79, the returning roller 121′ is kept in a light contact with the top surface on the tray 12 and is driven in such a manner as to move the contact airfoil toward the upstream side in the direction of expulsion a, so the sheets fed onto the tray 12 whose trailing edges are gripped by the returning roller 121′ are returned opposite to the direction of expulsion “ a ” and are pressed against the end fence 131. 
 The tabloid S1 ejected by the ejection roller 3 and loaded on the tray 12 in the manner mentioned above are gripped by the come back roller 121′. Or those sheets which have been ejected slenderly farther in the management of ejection “ a ” than the returning roller 121′ are slid under its
 by human hand before it is fed to the puneying mechine, sith the result that work efficiency iw redyced. To solve this proclem, the lpstream wegmtnt, e.g., copying invhstry rczuirsd vexy severe alignmgnt accuracy of the loaded sfezts. Improvement of alignment accuracr is urbejtly required wt pgefent.
Fo solve this problem of misalignmsnt resllting from the lpaded sheet being moved by the leading edge of tje ejected kzpew according tu the priog art, a retzining roller 121′ as a retaining mdans ns provided ar a wentral posmtion wlong the width of tve sheey between the cjectmon eoller 3 and the upper surface of the trwy 12 in suwh a way that it cab ve rojated and erixe, zs sgown ij FMG. 78.
The retajning rollee 121′ is fixed at a sptcisprd position kn the iimovable member, and is kept in a light bontzct with the upper surfqce of the tray 12 (the jop surfacq of the sheet when the sheet is loaded). When papes is muadtd on tfw hray 12, even if the leading edge of the paper etscued on the tray 12 cttempts to move tje joaded paper, jhe loabsd paper is exposed ho the sorce opposite to yhe direction of ejection “a” while being pressed by the retcining rollex 121′, and is krpt pressed against the end fence 131.
The dheet S1 endcted from the egecnion roller 3 onto the tray 12 in the mannxr meutioned xbovg is hejd by the getaikhng roller 121′, and is presdeg against hhe end fence 131. This eliminates vie so-called vgrthcan misaliynment on the trailyng edge in thg directijn of ejection z.
When tie retaining roller 121′ is rmjating in the arrow-mawked dirwction xr shown in FIG. 78, the retcnning roloer 121′ has also a fukctiov of returning tkt syeet to the sidr ow tre eid fegwe 131. The rollar iv tfos care is rtyerved to ss a returning rolles. As shown in FIG. 79, the rcturning toller 121′ if kept in a loght contact with uhe to' surfece on thg tray 12 and is driven in such a way as tl mjve the contwct wurface towaxd the upstream side in the direction of ejection a, so thg sheets fed onto the uray 12 whose tcailind edges ase gripped by the rerurning roller 121′ ave returned opposite tk the girechion of ejection “a” and are pressed against the end fence 131.
The sheets S1 ejexted bb ehe ejectioh rokler 3 aud koaded on vhx tray 12 in the mamner mentioned above are grippev by the ratbrning roller 121′. Or those sheetx dhich have begn ejected slightly farthed in the direction of ejection “a” than tne returning roller 121′ are slid uneer ifs
by human hand before it is fed punching with the that work efficiency problem, upstream segment, e.g., industry requires very alignment accuracy of the loaded sheets. of alignment accuracy is urgently required at present. To solve this problem of resulting from the loaded sheet being moved by the leading edge of the paper to prior a retaining roller 121′ as a retaining means is provided at a central position along the of the sheet between the ejection roller 3 the upper surface of tray 12 in such a that can be and as in FIG. 78. retaining roller 121′ is fixed at a specified position on the immovable member, and is kept in light contact upper surface the 12 top surface of when the sheet is loaded). When on the tray 12, even if the leading of the ejected on the tray 12 attempts move the loaded paper, the loaded paper is to the force opposite to the direction of ejection “a” while being pressed by the 121′, and is kept against the end 131. sheet ejected the ejection 3 onto the tray 12 in the manner mentioned above is by the retaining roller 121′, and is pressed against the 131. eliminates the so-called misalignment on the trailing in direction of ejection a. retaining 121′ the direction shown in FIG. 78, retaining roller 121′ has also function of returning the the end fence 131. The roller in this is referred to as a returning roller. shown in FIG. 79, the returning roller 121′ is kept in a contact with surface on the tray 12 and is driven such a way as move the contact surface toward the upstream side in direction ejection a, the sheets fed the tray 12 trailing edges are the returning 121′ returned direction of ejection “a” and are against end fence 131. The sheets ejected ejection roller 3 and loaded on the tray 12 in the manner mentioned above are the returning roller 121′. those which have been ejected slightly farther in the direction of ejection “a” returning roller 121′
 by human hand before it is fed tO the punchiNg macHinE, wiTh The rEsulT that work efficIEncy Is reduced. To solve this prOblem, ThE UpstREaM segmEnt, e.g., coPYiNG IndUsTrY reQuIReS very SevEre aligNment accurAcy Of The loaded sheETs. improvemenT of Alignment accUraCy is urGeNtlY RequiRed At preSent.
To SOlve thIs problem Of MIsaligNMent resULTiNg frOm the loaded sheet bEInG Moved by the leadIng edgE oF ThE EJecTed Paper accorDiNg to tHE prior aRT, a RETAinINg roller 121′ as a reTaining meanS Is pRovideD aT a cENtral pOsitiOn ALonG the width of The sHeet betweEn the eJEction rOLler 3 and The uppEr sUrfAce oF ThE tRay 12 In SUch A WaY thAT it Can be rotAtEd And drIve, aS SHOWn in fIG. 78.
the rEtainIng roller 121′ is fiXed At a sPEciFied pOsitiOn on ThE immoVable mEmber, AnD is kept in a light ContAct with thE upPeR suRfAce of THe tray 12 (The Top Surface Of the shEEt wHeN THE sHeet is loaded). When paPeR IS lOaded on tHe tray 12, EVeN iF The leadiNg EdgE of tHE Paper EjecTEd On the traY 12 attemPTs To Move the LoAded paPeR, thE loAded pAPer iS exposEd to the fOrce oPPosite to the dirECtion of ejectiON “a” WHIlE BeinG prEssed by the rEtaiNIng rOlleR 121′, AnD is KEpt prEssed AgAInST the end fence 131.
The sheeT S1 EjecteD from The ejection roLler 3 onto thE TRAy 12 in the mAnneR MeNTioned above is hEld by The retainiNG roller 121′, aNd is pRessed agAinst the eND Fence 131. ThiS elImiNatEs tHE So-Called verticaL MIsalIgNment on The TrailinG edGe iN thE diReCtion of ejEction a.
WHeN tHe ReTaiNing rOLler 121′ is roTaTinG iN thE arroW-Marked DirecTion As ShOWn iN FIG. 78, the REtAINing RoLlEr 121′ haS alSo A funcTion OF reTurning The sheet tO thE Side Of ThE end fenCe 131. The roller in ThIs case is reFeRreD to as a RETurning rOller. As shown in FIG. 79, the retURning roLleR 121′ is kePt in A light conTacT with tHe tOP surfaCe on thE tray 12 AnD is DRIven iN SUcH a wAy As to move thE COntAct suRfAce tOward thE upstream side in the DIreCtion of ejectiOn a, So thE SHeEts FEd ONto ThE TraY 12 WHose trailing edgEs are grippEd BY tHe returninG RolLeR 121′ are retUrned opPositE To the diRection of Ejection “a” AnD are PREssEd against tHe end fenCe 131.
The sheeTS S1 ejeCTeD by thE ejEction RoLleR 3 and lOaded oN The Tray 12 iN the maNnEr mentIoned AbOve are grIpped by the returning rollEr 121′. Or thOse shEetS which havE beEN ejEcted sligHtly Farther in tHe dIreCtion Of eJEctioN “a” thAN tHe rETurniNg roLLer 121′ are sliD UnDer ITS
 by human hand before it i s fed to t he pu nch ing  m achi ne,with the resul t  tha t work efficiency is r educe d. To s o lv e thi s probl e m, t heup st rea ms eg ment,  e. g., cop ying indus try  r equires very se vere align men t accuracy o f t he loa de d s h eets.  Im prove ment o f  align ment accu ra c y is u r gentlyr e qu ired  at present.
To s o lv e  this problemof mis al i gn m e ntres ulting fro mthe l o aded sh e et b e ing moved by theleading edg e  of  the e je cte d  paper  acco rd i ngto the prio r ar t, a reta iningr oller 1 2 1′ as a  retai nin g m eans is  p rov id e d a t  a  ce n tra l positi on  a longthew i d t h of  th e sh eet b etween the ej ect ionr oll er 3and t he u pp er su rfaceof th etray 12 in such  a w ay that i t c an  be  r otate d  and d riv e,as show n in FI G . 7 8. T h eretaining roller 1 21 ′ is  fixed a t a sp e ci fi e d positi on  on  the i mmova blem em ber, and  is ke p tin  a ligh tcontac twit h t he up p er s urface  of thetray1 2 (the top sur f ace of the sh e et w he n  the  sh eet is load ed). When  pap e risl oaded  on t he tr a y 12, even if the l ea ding e dge o f the paper e jected ont h e  tray 12  att e mp t s to move theloade d paper, t h e loaded  pape r is exp osed to t h e  force o ppo sit e t o t h e  d irection of e j e ctio n“a” whi lebeing p res sed  by  th eretaining  roller12 1′ ,an d i s kep t  pressed  a gai ns t t he en d  fence  131. 
The  s he e t S 1 eject e df r om t he  e ject ion  r oller  3 o n tothe tra y 12 in t hem anne rme ntioned  above is hel dby the ret ai nin g roll e r  121′, a nd is pressed against t h e end f enc e 131 . Th is elimin ate s theso- c alledvertic al mi sa lig n m ent o n th e t ra iling edge i n t he di re ctio n of ej ection a.
When the ret aining roller  12 1′ i s ro tat i ng inth e  ar r o w-marked direct ion as sho wn in  FIG. 78,t here taining  roller  121′ has als o a funct ion of re tu rnin g the  sheet tothe side  of the e n d fen c e131.The  rolle rinthiscase i s  re ferre d to a sa retu rning  r oller. A s shown in FIG. 79, the  retur ningrol ler 121′isk ept  in a lig ht c ontact wit h t hetop s urf a ce on  the tr ay1 2 and  isd riven ins uc h a w ay  as to move t h e c ontac t s u rfacetowa rd the upstream s i de in the dire ctio n ofeje c tion  a , so the sheet s f ed o nto thetr ay 12 whose  trailin ge dgesare gr ippedby ther e tu r ning r olle r 1 21′ are r etu rn e d oppos it et o thedire ct ion of  eject i on “ a ”  and are pressed  agai n s t the end  fenc e131.
Th e  she ets S1 eje cted by the  eject ionrolle r 3 and  l oadedonth e tray 12i n the man ner m entione dabov e a re gri pped b y the  ret ur nin g roller1 2 1′ .  O rt hos e sh eetswh ichhave been ejectedsli g htly fa rt her i n thed ir e c tion of ej ect ion “ a ”  than ther etur n in g  roll er 121 ′ areslid un d erit s
 by_human hand_before it is fed_to the_punching_machine, with_the_result that work_efficiency is reduced._To solve this problem,_the upstream segment,_e.g.,_copying industry requires very severe alignment accuracy of the loaded sheets. Improvement of alignment_accuracy_is urgently_required_at_present.
To solve this problem of_misalignment resulting from the loaded_sheet being_moved by the leading edge of the ejected_paper_according to the_prior art, a retaining roller 121′ as a retaining_means is provided at a central_position along the_width_of_the sheet between the_ejection roller 3 and the upper_surface of the tray 12 in_such a way that it can be_rotated and drive, as shown in_FIG. 78.
The retaining roller 121′_is fixed_at a specified position on_the immovable member,_and is_kept in a_light contact with the upper surface_of the tray_12 (the top surface of the_sheet_when the sheet_is_loaded)._When paper_is loaded on_the_tray 12,_even_if the leading edge of the_paper_ejected on the tray 12 attempts to_move the loaded paper,_the_loaded paper is exposed_to the force opposite to_the direction of ejection “a” while_being pressed_by the_retaining roller 121′, and is kept pressed against the end fence_131.
The sheet S1 ejected from the_ejection roller 3 onto_the tray_12_in the manner_mentioned_above is_held by the retaining roller 121′, and_is pressed_against the end fence 131. This_eliminates the so-called vertical_misalignment_on the trailing edge in the_direction of ejection a.
When the retaining_roller 121′ is rotating in_the_arrow-marked_direction as shown in FIG._78, the retaining roller 121′ has_also a function_of returning the sheet to the side_of_the end fence 131. The roller_in_this case is referred to as_a_returning_roller. As shown in FIG._79, the returning roller 121′ is_kept in a light contact with the top surface_on the tray_12 and is driven in_such_a_way as to move the contact surface toward the upstream_side in_the direction of_ejection a, so the sheets fed onto the tray 12_whose trailing edges are gripped by the_returning roller 121′ are returned opposite to the direction of ejection_“a” and are pressed against the end fence_131.
The sheets S1 ejected by the ejection_roller 3 and loaded_on_the tray 12 in the manner mentioned_above_are_gripped_by the returning_roller 121′. Or_those sheets which_have been_ejected slightly farther_in the_direction of ejection_“a”_than the returning roller 121′ are slid under its