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Патент USA US3078798

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Feb. 26, 1963
|_. E. BROUGHAM
3,078,794
HECTOGRAPHIC AND LIKE DUPLICATING MACHINES
Filed Feb. 26, 1960
5 Sheets-Sheet l
Fbgl.
20
19
II
22
15
i
B)’
‘,
JIM/1%
A TTGP/VEY
Feb- 26, 1963
L.’ E. BROUGHAM
3,078,794
_I-IECTOGRAPHIC AND LIKE DUPLICATING MACHINES
Filed Feb. 26, 1960
3 Sheets-Sheet 2
mam/70,4’
Jaw/0% m
Feb~ 26, 1963
3,078,794
|_. E. BROUGHAM
HECTOGRAPHIC AND LIKE DUPLICATING MACHINES
Filed Feb. 26, 1960
3 Sheets-Sheet 3
By
ATTORNEY
United States Faitent v"
r‘
3,078,794
.
ice
Patented Feb.- 264963
2
,
means as, the printing drum‘ is brought to the, said; initial
3,0785794v
HECTOGRAPHIC AND'LIKE DUPLICATING
crvstar??gppsi?ony,
' land, assignor to Block, & Anderson Limited; ‘London,
‘
y
I '
‘
‘
v
9
Fikd F. 31- 26, 1969, Ser. No’. 11,269’
e
e
C‘laimsipriority, application Great Britain Mar. 2, 1959
h
3 Claims._ (Cl.’1‘0,17—vl3;'.“5)
.
,
pad, lifting arrangements“ is to'rnakethe precise starting
Leslie Ernest
"'Brougham,"Hammersmith,
‘MACHINES
London, Eng!
England, a British company.
i.
So farf'as' thexope‘rator is concerned, the effect of such
'
This invention relates“ to, hectographie and lilge dupli~
10
positioninoi'e di?iciilt'to__'deterniine since ‘it now occurs
intermediates
position of the crank Handle where
eitrapressureis needed‘ to cause the lifting of‘the' darnpl
ing pad and a second position. where‘the ope?ating‘pres
sure ‘required isfte'mporarily lessened as‘ the clampingv pad
'returns again to itsv lowered operative position 'under'the
in?uencef'of its. biasingsp'ring. Theresult is a tendency
eating niachinesand isv more particularly con'rce'rned with ‘ " for the ‘operator to overshoot thei'req‘uired starting posi
tion unless the resistance to movement imposed by‘ the
retort-Said heating msan‘sfis Still fiirtherrinsrsassdi
"
’ In machines of such type it: is necessary to provide 15' ‘An object‘ Qt‘thép'r‘esent invention 'is'fo Provide. an
irnproved‘an'd simpli?ed construction'for use'in such ma
means for ‘ensuring the arrest of the printing drum' at‘a
chines having a director 1:1 driving connection between
predeterminedlinitial’or starting position in order to per
afduplic'ating rnachine comprising _'a niastencarrying print
iris drum Whichis rotatable m'amlall? by e¢ran1§1iandl@
theope'ratirig crank‘handle‘and the printing drum where
mit the accurate'feedin'g-in of the ‘copy ‘sheet with relation
to the image on the master ‘sheet which is supported by
the printing drum. In order to do so. it is customary to
provide some'fo'rn'i of locating means, ‘such'as afspring}
urged roller carriedupeon the rnachine frame gqdhd'apted
20
to enter 'a7de'pression" or dwell‘: region in'the contoured
surface of a cam disc carried by the'printing druni; When
such =drurn' is arranged for rotation'by thel'riia'nual cranlg
handle'through a speed reducing gear train; for instance
one affording a 2:1 speed reduction whereby two corn
piete revolutions of the crank handle are needed to rotate
the drum through each operative single-revolution print
ing cycle, the provision of- the requisite degree oi accuracy
of location in thefreq'uired starting position withoutyat
25
by the above described. di?isultv o'fdrum location it5 IQ
duced' orvelirninatedh 1 ‘I
i
"
"
'
In, an. arrangement according to the invention the‘ .op
erating crank handle is provided with'a'stop member, posi
tioned normallv‘to engage with 'a ‘stationary ?blitmént
carried upon the machine ‘frame ‘in a position which posi
tively arrests the printing ‘drum ‘in the required‘ starting
grasping'th'e crank ‘handle, against the action of ‘spring
biasingvrneans to a. positionv where such‘ stop is, rnoved
clear ‘of Said stétiotilairi‘abutnient thereby ‘to permit the
c'ofr'ninence'men't eta ‘fresh opetative stroke of the crank
the same time, imposing an excessive resistance 't'o're
sumed niovernent of the cranlc'handle away ‘from such
‘locating position in order to effect the'neitt operation,‘
not unduly di?‘icult. ’Whe_n, however; for simplicity and
cheapness it is desired to eliminate the speed Jr‘e‘drictr i1
‘gearing and to couple the crank 'handle’directly to‘ the
printing drum, the provision oi an adequate degree ‘of
accuracy of positioning of thedr'urn without ‘exeessiv'e
resistance to resumed movement of the cranlc handle ' ‘lay
become'dif?cult.
This di?‘iculty is increased
‘“
' ' when
" " the machine
" ' '
"
_
v,
_
'
’
A
.he‘m?nuallv‘ en’gageable part ‘of
mernber vis so positioned relatively, to
the handle grip of the'f’crank handle, that it must be re
leased byi'the'oper'ator' as‘the'c'rfa‘nlchan'dle is rotated to‘;
wardly through a compiete‘operative ‘revolution
i ' " In‘o‘rde'r' that the nature 'ot'the invention may be more
readilyunderstoo'd'dne particular constructional erhbodi~
in
'ther'eof’wi'll now b described by way of illustrative
40 eira pl ithreferjence o H e accompanying? 1dr‘ rigs in
is ar
1 is a plan view of an operating crank handle
r 7
arrangement in accordancewith the revenues‘.
‘ 1
i
2.7" i corresponding side elev'a ionahview of the
ranged to employ aa'mj ing" a; rr'ioifste'nin' ,
pad type‘fo'r 'applyin'g'a'?hn of 01 cut liquid
positions 911 step his'itlbér being. itself movable manually,
as byipressu'r'eio'f lihélhllilibg; ?nger of the operator'while
face "of the copy'sheet as it enters the printing bight or
hip between thQ Printing drunr‘an', a co-operatiiig coil te‘if
arriangémamqf?q; ‘1.
pr'es'sure roller. The easontor this, is that; W1 sub (1
type damping means, i is essential also to lift er" ot r
wise' separate the damping pad frem‘an'iopp‘osingcopy
sheet supporting surface‘atthe Saine 'initia‘l'ohstarting
Position "in ordé'r t0 Permit nee Passage tif'the fqfwsrd
.
,.
.
.
spirit duplicating
is‘a vertical.
machinecross~section
embodying taken
known through
iofrriis' of
drum locating" and darnping'pad lifting” arrangements
50
while
""FIG'. 4
' is a side
" .elevational
‘ ii” " view‘ ,of a'machine,
"i similar
‘
to that shown in
3 but incorporating the drurn' Io
edge of the new copy sheet 'then'being‘prese'ntedto the
cating arrangements of the present invention; '
machine past such damping 'Pad'aud ‘right 11p to thepri'rit
irig nip. This positioning of the new‘ copyshe tis e sen
' Reference‘will ‘?rst be irnade t-o'iFuIyG. 3 in which the
rnachine shown comprises‘ a'priri'tin'g'
nip immediately, the Printing drum c'?mhiensiésits heir“
rotation and is thereby drawn into" the. e , incv inproper
registration with the master i' rage c_ ‘r'ried' byYthep'rmting
left-handplateis shown. "The"
crank handle
60
'
“such
' that the commencement of thenioi'stened ‘region'of
65
rating
through a (Suitable rise of Ptbié
rer?on 1Q ‘wnt'io'l
.
'lever mechanism‘
which is co'r‘iple
the TQ?mPi?g 'pad 70
whereby the latter ,is rnoved away f_ [In vitsfno'rrrialsheet
contacting position against 'the'a'ctio'nsof biasing spring
manner,
stance/rot
a leading
receiving
‘edge and
of theholding,
iina'geQbearingvtnasterlsheet
‘in already"
eta-operates with »'a counterpressure roller léi'fsecured'up
’ Such pad lifting movement and the subsequent pad
and‘
operating
v24 "which is normally disposed wrapped around 3a part
ofI the peripheral surface of thedrurn." The drurn'zl
the
sheet
m-a-sterimage;
arrives‘ "at thei printingi. ..nip'hefo're
a‘ ..
i ‘the ‘first
.i
part
,
,
further jcarn 'secur'ednto the'print'n '
‘El/‘has
directly connected thereto and‘ is pro
vided with an axially’ directed slot 23 inv its peripheral
drum. At the same instant‘, the dain'piiig" pad giius't'be
lowering moveinent on to the'copy' sheet irlrimediately‘the
latter starts to‘mov‘e' forwardly inust'he effected auto
matically'and are usually'br'ou‘ght about bymeans a
21 'jsecure'd
to a'horizo'ntal' axle“ 22" jhournall'e'd at each end thewside
frame plates '20. of the machine andof which only the
tial inhorder that the sheet maybe gripped within" such
lowered again on to the copy “sheet in \ordefto ensure
' "
on a spindle 726 which is conventionally mounted in
.tlérivgisrsss Tsvmésrt ‘was 4116* Show)? Whmb'v such
V
‘
‘counterpressure
rollernisv
urgCd. resiliently I‘
wards the
printing” drurn with‘ 'a' pressure whichca'n be djuste'd at
' the operator; '
copy. sheet,v as'shetvn
,
is fed 19 the Printing tight as nip 2.8 have? the drum
and countenance ‘roller-L Q-Ysi a cedar-late '29 ‘extend
ing between the side frame‘ plates 20. After passing
3
3,078,794
through they printing nip the printed copy sheet is de
4
takes place the drum 21 is arrested in the desired initial
or starting position identical with that shown in FIG. 3.
Referring now also to FIGS. 1 and 2, the crank handle
livered over a delivery plate 30.
To effect damping or moistening of each copy sheet
as it passes into the printing nip.thereisprovided pad
10 comprises a conventional radial arm 12 carrying an
type ‘damping mechanism 31 including ;a¢pad w32 offelt
outwardly projecting grip roller 13 at its free end. Ad
.or like material carried ‘in a box-like casing v33 pro
jacent :this grip _royl_ler '13, on the inside or'frame facing
surface oruie arm 12, is ‘arranged the movable stop
member "14 consisting .of a metal plate having an in
vturnedslug :15 at its :lowerend and anoutwardlvturned
vided with .a liquid supplyconduit 34. II‘h_e_pad_3_2 with
its casing 33 ‘is carried, in readily removablemanneruin
a‘guide ,channelformed between plates 35 .and '36 form
_ing part of a support strueture’37 which is pivotally
10
mounted _at.eac_h side and as indicated at 38 upon the
opposite side plates 20. Attachedto such support struc
thumb pietcetlti at its upperlendisuch thumb pieceibeing
positioned ‘to .overlie‘th'e' end of ‘the arm 12 immediately
alongside the grip roller 13 when theparts are in the
ture ,37iis an arm ,38 carryinga cam followefrgroller ;3,9
.atitsfree end. Such follower roller is .biased, as by
position as shown ‘in FIG. 4, which corresponds to that
.is carried at thefreeend of ,a lever arm 44 .pivotally
mounted upon the lleftghand ‘side plate 20 .and is re
.n?wlyyinserted.copy‘sheet, theoperatormust ?rst depress
,‘thethumb piece ‘16 therebyto move the lug 15 clear of
the stop pin .19. Such depressed position _is shown in
‘chain dotted linesin FIG. .4. The crank handle l?can
.of the initial ortstart‘ing position ,of the drum 21.
spring means 40,:towards the periphery of acam disc 41 15 The stop‘mernber 14 :is pivotally ‘mounted upon the
secured ,to the ‘drum 21. The ‘cairn disc 41 hasfasingle
arm .12 by means of .a pivot arm '18 and is biased by
raised portion.42 andthe'arrangement is-Vsuch that, ‘only
means of Vafspring 17 disposed around such pivot pin 18
.when .such raised portion is under ,the cam follower
so are ‘normally tooccupy the ‘ position shown in full lines
roller 3.9, is.the.damping.pad._3.2 lifted clear of the feed
in “FIGS. 1;, ,2 and 4. ‘In .this position the lug 15 is _so
:p'late29 .thereby .to allow unobstructed ,feedingsin move
positioned that it ‘comes into positive engagement with
ment ofthe copy sheet 27_.right upto the printing .bight
the ?xed ‘stop ‘pin ‘19 projecting outwardly from the ad
28. At-all .other positions .of thecam disc 41,.the pad
.jacentxside frame plate ,Ztlof the machine as the ‘crank
32 is lowered so as to wipe the upper surface of ‘the
,handleis.moveddownwardlyinthe direction of the arrow
copysheetasit passes totheprintingnip 28.
. a, .FIG. ,2, .atithe completion of ‘each operative _ stroke ‘of
The printing drum 21 isshown in_FIG._,3 in the afore 25 the handle.
_
mentioned initial or starting positionand is located in
T0 commence a fresh‘strokepf the crank handle pm
such position by means of arcamlfollowerroller 43 ,which
,order to effect _-a further printing operation upon the
siliently urged by spring means 451into adwellregion 46
.in the periphery of a furthercarn disc 47 connected \to
30
vthe printing drum21.
now‘berotated but,__by_ reason of the position‘of the thumb
As willjbe .apParcnt_iromjE‘I_G. 3,-the movement of
‘piece 16 with relation tQthefree end-of the crank handle,
the printing drum, 21 _ to_th_e_ initialor starting position,__as
__this,_thurn_b piecemustautornatically pass from‘under the
.shown,"hy means of the crank .handle , ‘1,0, necessitates 35 thumb .ofthe operatqrasthe?rank. handle. is rotated ?rst
some increase in the pressure applied to the_han_dl_e in
downwardly and then upwardly again through a enm
order to .lift the .cam _follower roller ;39 up on to the
ipleterevolutionsince am P9$i?°n.1.3.0° displaced from
Ithat shown‘inEIG. -4,.the._thumb piece 16>is'lying under
peak of the raised portion 42 oftbaoam .disc 41. When
such roller 39‘is_resting upon theipeak of‘thisraised por
tion 42,, the other ,camgfollowergroller 43 has dropped
into thedwell region 46 'ofthe camydisc _47_a_nd4i_n"s_o
inqathaandgnot on top‘of thecr'ank handle. _In conse
40
quence as the crank handle again approachesthe position
{shownin FIG- ,4_fr0.1n abvverthereleased stop member
doing has tended to apply a'limited amount of?forward
14‘ is l‘ in a [position where r the‘ lug‘ 1,5 . again . engages the
'torque'tothe-drum 21. Similarly whenurotationpofthe
stoppin p19 “and so arrests ,the fdrurn 21 in thecorrect
crank handle‘is resumed to commence a 'fresh operative
initial position at the precise end of one operative revolu
cycle, the return of the cam follower roller 39sdownthe
tion of thedrum.
opposite side-of theraised‘portion 42 projection tends
to assist the operator‘ bylessening the pressure required
'
‘The arrest position. ofthe crank handle 10; is preferably
arranged, as shown, to beapproximately 90° lbeyondits
guppermost _ver_tical position whereby the villlitial‘tstarting
followervrollcr 43 out the dwell '46 of thevcam disc 47
movement of the crank’ handle isalways downwardsto
calls for some additional operating pressure, Thetwo 50 .wardsytheptable or other surfaceby which the machine is
upon the crank ‘handle'but'the need_;t,o move the cam
effects 'to someextent counterbalance vone another and
as a result it is difficult to provide va positive ‘locating
supported. This ‘avoids any tendency ‘for a machine
whichy‘is of_relativel,yvlight construction _to belifted by
.theapplierl manual operatinspressure
action which can_readily be sensed by the operatorun
'less the dwell region 46 is made deep or steepsided or,
alternatively, _‘ heavy spring pressurejis applied ‘by the
55
'_.l.ri..<=.er.taintorms.sf machine, partiwlarlypprteble me
ehinesit isrlesirablethat thcsfank handle Shall be read
spring means 45. _In view of‘the direct ‘driving connec
tion between the crank handle v10 and the drum 21 any
such measures to increase the sense ofupositive' location
.;il,y_<ietashable- lathe.particular.embos?rnéntshown this
requirement?isnmetby" providingvtthe centrelboss ofzthe
‘but also tend to introduce erratic or jerkyoperation of
axle.22“1n_order tolsetrup therequilsite driving connection
"between thedrum 21‘ and ‘the handle 10.
handle .wrthga projectingspigot pin. 11 having ‘a, ?at sur
in the initial or starting position?uot only vincrease the
gtase .48etitsite'e endfbr' cooperation with a comple
etfort'required from the operator to start each ‘operation so; mentaryiDv-seetiontregion of an axial borein the drum
the machine whereby the speed of rotation of the printing
drum is uneven. This can resulttin poor quality prints
I_clairn:
by reason of inequality of the amount of- solvent applied
_1.‘A jhectographic duplicating machine ‘comprising a
to the copy sheet- as it is moved with‘ varying velocityrbe 65 machine ‘framework ‘and _a ‘printing drum rotatably
neath the damping pad 32.
Referring now to FIG. 4, showing one arrangement
in accordance with the invention, the drum locating
means'of FIG. 3, consisting of the cam follower roller
‘43 and the cam disc 47 are eliminated and, instead'the
mounted therein, a manually operable crank handle or
:eratively connected tOUsaid‘printing drum‘by a 1:1 driv
'ing connection, pa stop?member comprising a metal plate
'- having an outwardlybentthumb receiving portion at one
end andv aninwardly bent’ stop-forming lug at its opposite
crank handle 10 is provided with a movablejstopgindi 70-wendtsaidstop member-being pivotally mounted Jon
v the
cated generally at 14, which is normallyv biased to a posi
J
inner
surface
of
said”
crank
handle
for
rocking
movement
tion where apart 15 thereof positively engagesa sta
.about .a point intermediate said inwardly and outwardly
tionary abutment-19 ?xed to‘the outer surface of the
" bentportions, spring meansL biasing said stop member to
right-hand side frame plate 20. When such engagement 75 a?rst position, and a‘ stationary abutment on said ma
3,078,794
5
chine framework positioned to be in the path of said stop
forrning lug when said stop member is in said ?rst posi
tion to arrest said drum in the correct position for com
mencement of an operation cycle of the machine, said
stop member being movable against said spring means
by pressure applied to said thumb-receiving portion to a
second position where said stop-forming lug is clear of
said stationary abutment to allow commencement of said
operation cycle.
6
3. A hectographic duplicating machine comprising a
machine framework and a printing drum rotatably
mounted therein, a manually operable crank handle pro
vided with a spigot having a ?attened free end, a com
plementary socket for said spigot end in said drum to
provide a readily releasable direct driving connection
between said handle and said printing drum, a stop mem
ber comprising a metal plate having an outwardly bent
thumb receiving portion at one end and an inwardly bent
2. A hectographic duplicating machine comprising a 10 stop-forming lug at its opposite end, said stop member
being pivotally mounted on the inner surface of said
machine framework and a printing drum rotatably
crank handle for rocking movement about a point inter
mounted therein, a manually operable crank handle in
mediate said inwardly and outwardly bent portions,
cluding a handle grip directly connected to said printing
spring means biasing said stop member to a ?rst position,
drum, a stop member comprising a metal plate having
an outwardly bent thumb receiving portion at one end 15 and a stationary abutment on said machine framework
and an inwardly bent stop-forming lug at its opposite
end, said stop member being pivotally mounted at the
free end of said crank handle with said thumb-receiving
positioned to be in the path of said stop-forming lug when
said stop member is in said ?rst position to arrest said
drum in the correct position for commencement of an
operation cycle of the machine, said stop member being
movable against said spring means by pressure applied
about a point intermediate said inwardly and outwardly 20 to
said thumb-receiving portion to a second position where
bent portions, spring means biasing said stop member to
said stop-forming lug is clear of said stationary abutment
a ?rst position, and a stationary abutment on said ma
to allow commencement of said operation cycle.
chine framework positioned to be in the path of said
stop-forming lug when said stop member is in said ?rst
References Cited in the ?le of this patent
position to arrest said drum in the correct position for 25
UNITED STATES PATENTS
commencement of an operation cycle of the machine,
said stop member being movable against said spring
982,543
Stableford ___________ __ Ian. 24, 1911
means by pressure applied to said thumb-receiving por
2,128,507
Storck ______________ _._ Aug. 30, 1938
tion to a second position where said stop-forming lug
2,215,495
Berman _____________ __ Sept. 24, 1940
portion overlying said handle grip for rocking movement
is clear of said stationary abutment to allow commence
ment of said operation cycle.
2,273,272
Knauer _____________ .._ Feb. 17, 1942
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