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Патент USA US2404756

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July 23; 1946.
2,404,756
G. SPIESS
-APPARATUS FOR CORRECTING DIFFERENCES IN REGISTER
Filed Jan. 8, 1942 ‘
2 Sheets-Sheet l
In ven for
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July 23, 1946.
G. SPIESS
2,404,755
' APPARATUS FDR CORRECTING DIFFERENCES IN‘REGISTER
Filed Jan. 8, 1942
2 Sheets-Sheet 2
Fig. 5
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1
Patented July 23, 1946
2,404,755
UNITED STATES PATENT OFFICE
2,404,756
APPARATUS FOR CORRECTING DIFFER
ENCES IN REGISTER
Georg Spiess, Leipzig W. 31, Germany; vested in
the Alien Property Custodian ’
Application January 8, 1942, Serial No. 426,025
In Germany February 5, 1941
2Claims.
i
(01.271-59)‘ '
1
2
The invention relates to an apparatus for use
on the feeding table of a printing machine for
the present invention in which no fan-shaped
avoiding differences in register, which might oc
tongue is used.
.
According to the invention several small bars
our and result from the ‘alteration of the paper
of sheet metal or the like are arranged on the
by physical in?uences, such as moisture and tem
feeding table of the printing machine in the con
veying direction, one at a distance from and par
allel to the other and adjustable in height and
adapted to be lowered into the plane of the feed
perature.
It is a well known phenomenon that, for in
stance when carrying out multicolor printing, the
printing sheet expands after each impression ow
ing table, and further adapted to be lifted indi
ing to the moisture taken up from the printing 10 vidually parallel above the surface of the table as
ink, and consequently the several successive im
well as at an angle of inclination relative to the
prints do not ?t accurately the one on the other,
surface of the table, descending or ascending in '
the ‘conveying direction according to require;
so that a perfect printing result can not be ob
ment for avoiding the differences in register.
tained. This same inconvenience occurs when
the percentage of moisture contained in the air 15 The adiusting of the small bars cantake place
alters owing to change of temperature.
Apparatus for removing differences in register
are known, which are provided on the delivery
table of the sheet feeding table of the sheet feeder
of the printing machine.
It consists of a fan
like tongue, composed of two parts and adjustable
during the service.
if I
‘
, yA'n embodiment of the invention is illustrated
by way of example in the accompanying draw
ings, in which
Fig. 1 shows in side elevation the apparatus on
a feeding table for laying on by hand,
Fig. 2 a cross section through the apparatus, at
relative to the surface of the table in vertical
right angles to the conveying direction,
and lateral directions, said tongue adapted to be
Fig. 3 a top plan view of the apparatus,
adjusted so that the side edges of the sheet lifted
Figs. 4 and 5 are views, in front elevation and
‘by it and resting on the surface of the table can 25
side elevation, respectively, of the adjusting de
be brought into the correct position relative to
vice.
the lay marks for passing through. This fan-like
Figs. 6 to 10 show several adjustments by means
tongue is mounted in the middle of the feeding
table, co-ordinated to the lay marks, so that the 30 of the apparatus.
In the embodiment illustrated, the apparatus
sheet to be printed can be lifted only in the mid
according to the‘ invention is provided on a feed~
dle. If, however, the differences in register exist
ing table for hand feeding of a printing press
only, viewed in the conveying direction, on the
between the pile table I and the press 2 on the
left or only on the right hand side of the sheet
inclined feeding table 3. It is evident, that the
to be printed, it is not possible to avoid these
differences in register with the aid of this appa 35 apparatus may be used also in connection with
a feeding table for automatic sheet feeding, in
ratus. The same is operative only if the differ
which the sheets are taken from a pile for in
ences in register are greater or smaller on the one
stance b-y suction nozzles andfed by means of
side or on the'other side of the sheet to be
conveying bands onto the feeding table 3 of the.
printed than on the other side of the same.
press 2, the upper sides of these conveying bands
:Such apparatus also involves the inconvenience,
moving in the plane of the table in grooves in
that the front edge of the tongue terminates at
a greater distance from the lay marks, and con
sequently ‘the sheet is pulled back towards the
the table,
.
‘
.
‘ The sheets are adjusted in known manner on
the press 2 on lay marks 4, before they are taken
rear from the lay marks at the parallel lifting 45. over by the grippers of the printing cylinder. ‘
of the tongue. The fan-shaped arrangement is
According to the invention severa1 bars 5, 6, ‘I
further prejudicial in that at the spreading of
are mounted at a distance from each other and
the two tongue-parts arranged one above the
parallel to each other on the feeding table 3 in
other, two different bearing planes are produced
the direction of conveying indicated by the ar
for the sheet, so that the sheet is lifted irregu 50 row A, the surface of said bars being normally in
larly. Further, the tongue adapted to be ad
the same plane as the surface of the table 3, these
justed in lateral direction can only be adjusted
bars being located in indentations in the table 3,
towards one side, with the result that only a uni
and mounted so that each bar by itself can be
raised parallel to the plane of the table 3, as
these inconveniences are avoided according to 65 shown in Figs. 8 to 10, or adjusted at an angle
lateral lifting of the sheetcan take place. All
2,404,756
3
4
to the surface of the table, either descending in
the conveying direction as shown in Fig. '7 or
ascending in this direction as shown in Fig. 6.
Each of the bars 5, 6, ‘l which, for instance, are
the direction of conveying, the bars are adjusted
made of thin sheet metal, is ?xed on a flat iron
and this flat iron is ?xed in turn on two U-shaped
bearings 8 which are hingedly mounted on two
rams 51 mounted below the feeding table. For each
bar two rams 9 are provided, one ram in the
an ascending or at a descending angle. If differ
ences in register have been ascertained only on
front part and the other ram in the rear part
of the bar. For each ram one adjusting device is
provided. This adjusting device consists, as
shown in Figs 4 and 5, for instance of an adjust
accordingly obliquely, whereby the sheet is pulled
back on the lay marks or pushed foreward, ac
cording to whether the bars have been inclined at
that side of the ‘sheet which is at the right hand
side in the conveying direction, these differences
in register can be regulated either by uniform
lifting of the bar 5 or by adjusting this bar at an
angle. The bar 1 must be adjusted accordingly,
if differences in register have to be corrected on
the left hand side of the sheet. ' In this’instance
ing wheel l9, arranged on aside of the feeding '
the'midclle bar 6 may also be used. The attend
table 3, the spindle H of this adjusting wheel
ant can‘ therefore use the bars according to re
having ?at screw-threads engaging threads in a
spindle wheel I2, and a control mechanism it,
quirement vand is able to carry out all corrections
necessary for overcoming differences in register
which is hingedly ?xed on the one hand on the
merely by properly adjusting the bars.
spindle wheel I 2 and on the other hand on a
After the adjusting of the bars, the sheet 19
segmental bellcrank disc 14 which is mounted
to be printed is no longer. lying plane on the feed
ing table 3, but slight bulges are produced in the
sheet to be printed, and the corners of the sheet
to be printed are either pulled back or pushed
forward on the gripper edge.
on the axle it so that it can freely move on the
same and has a catch it which engages in a re
cess [-1 in the ram 9’. Rotary‘ adjustment of the
adjusting wheel is therefore positively trans
By the employment of ‘the apparatus the oper
mitted? to the ram 9 which in turn adjusts the 25
ation of the lay marks is not altered in any man
corresponding bar in a vertical direction. The
ner or impaired. The bulges in the sheet to be
ram 9 is guided between bearings IS.
printed are removed during the rolling of the
The invention provides further, that by the
lifting of the bars the sheet lifted thereby cannot
printing cylinder by the counterpressure of the
bulge inward-1y behind the bars toward the front 30 counterpressure cylinder produced at the trans-v
mission of the picture to be printed, this result
marks 4', as has heretofore been the case when
the sheet was drawn away from the front marks.
being favored by the fact that the paper absorbs
\Vith this object in view, an extension 5’, 6’, ‘I’
moisture during the printing and thereby becomes
less resistant and more yielding.
can‘ be hingedly connected with the bars 5, 6, 1,
respectively, so that the point of the extension, ’
I claim:
I.
the feeding table as shown on an enlarged scale
i 1. A device on the feeding table of printing
machines for removing differences of register re
in the upper part of Figure 1. The extension of '
the bar forms thereby a bridge for the lifted
ical in?uences such as moisture and temperature;
when any bar is lifted, remains in contact with
sulting from the alteration of the'paper by phys
sheet, which consequently cannot bulge inwardly. 40 comprising in combination with the feeding table,
several bars of sheet metal arranged in the con
The bridge may also be formed by providing a
veying direction in said feeding'table in parallelly
transverse bar which can be lowered into the feed
spaced positions two rams for each bar arranged
- ing table and has an oblique surface, said trans
below said feeding table and hinged to the bar,
verse bar being adapted to be adjusted from below
upwardly so that the inclination descends in for
each of said rams having a recess, shiftable means
ward direction.
extending into said recesses for moving the rams
_
and adjusting the bars vertically.
The avoiding of the differences in register is
2. A device on the feeding table of printing
effected by the apparatus according to the inven
machines for removing differences of register're
tion in the following manner:
If di?erenceslin register have been ascertained 50 sulting from the alteration of the paper by phys
ical in?uences such as moisture and tempera
on both sides of the sheet to be printed in trans
ture, comprising in combination with the feed~
verse direction of said sheet, and these differ
ing table, several bars of sheet metal arranged in
ences in register become perceivable, regularly or
the conveying direction in said feeding table and
irregularly on both sides, these can be avoided
parallelly'spaced from each other at suitable dis
by elevating the two bars 5 and ‘I more or less
tances, two rams for each of said bars arranged
uniformly or irregularly, whereby the sheet 19
below said feeding table and hingedly connected
to be printed, indicated in dash-dot-lines in Fig
toihe bars, each of said rams having a recess,
shiftable means extending into said recesses for
1 side and lesson the other side. If only small 60 moving the rams and adjusting the’ bars ver
tically, and an extension hingedly mounted on
differences in register occurred uniformly on both
each‘ bar and serving as bridge for a sheet ele
sides of the sheet it is sufficient, to raise only the
ure 3 of the drawings, is more or less reduced in
widthat both sides uniformly or more on the one
middle bar; At differences in register occurring
in the longitudinal direction of the sheet, i. e. in
vated on the bars.
'
-
'
.
GEORG SPIE‘SSL
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