-
The invention relates to a preferably preprinted card
affixed in an easily removable manner to a page of a printed
matter, in particular with multiple pages, e.g. for
response advertising. Relevant state of the art are provided
by, a.o., US-A-4.351.517 and EP-A-0.948.178, the contents
of which is incorporated in here by reference.
-
In particular the invention concerns automatic affixing
of identical cards to the upper or lower face of an
advancing web of paper or other sheet like material, wherein
the affixing takes place in an synchronised manner,
such that each of the cards is affixed to the advancing web
at a predetermined location in a repeating web length. This
repeating web length is e.g. determined by the page dimensions
of the printed matter, such that each repeating web
length contains the same print. The web exits a printing
device wherein it is printed with e.g. text, images, etc.
and after the card is affixed, the repeating web length is
separated from the web and joined with other separate
repeating web length (printed with different text, images,
etc.) into the desired multiple leaves printed matter. Thus
the cards are affixed prior to the web is being cut.
-
Particular for this art is that the cards are affixed
with merely a small area part onto the printed matter,
usually less than 50%, even less than 25% or less than 10%
of their surface area. Usually a hot melt is used for
affixing to the web.
-
In the past these cards are affixed by adhesive at one
side edge, such that they can be easily removed from the
printed matter. It has come out that without further measurements
the card remains not under all circumstances flat
lying against the advancing web, which complicates or even
makes impossible subsequent processing (such as cutting) of
the web. This problem is particularly with cards provided
with a parallel to the adhesive edge extending line of
weakness, such as a tear perforation, with which the card
can easily be torn loose from its side edge permanently
affixed to the printed matter. To be able to keep the cards
reliably flat lying against the web, the card is presently
guided along a retaining or bearing surface (e.g. a PMMA
(Teflon) foil). This solution is satisfying for the class
of printed matter for which the automatic affixing cards
onto the web is applied nowadays, i.e. the class containing
magazines.
-
The inventors realized that the above way of automatic
affixing cards can also be interesting for the class of
printed objects to which newspapers belong. This class of
printed objects substantially differs from that of magazines,
e.g. due to the edition, but also due to the applied
ink and paper dimensions/quality. In the past cards were
adhered in newspapers during completion, i.e. after the web
has been cut into sheets. That is a substantially more
elaborate and costly procedure. The fact that the in the
above manner automatic affixing of cards, already known for
more than 20 years in the field of magazines with the
accompanying advantages, is not earlier introduced in the
field of newspapers, is probably due to a technical prejudice.
Perhaps this prejudice is exaggerated by the situation
that at the moment the cards have to be adhered onto a
web, to be applied for a newspaper, the ink is still wet.
This is an important difference with the field of magazines,
caused by the application of a different printing
technique with consequent different drying time for the
ink.
-
Thus the invention in a first aspect relates to automatic
affixing of cards onto a web to be applied for a
printed object of the newspaper-type.
-
While developing this invention, the inventors have
found out that guiding of the web and card adhered thereto
along a retaining or bearing surface to avoid erection of
said cards, causes problems with the printing quality,
since the not yet dry ink is smeared by the retaining or
bearing surface. The inventors have solved this problem by
ensuring that the cards are affixed to the web such that
the card can not erect therefrom during the further course
of the web through the printing apparatus. Therefor the
card is e.g. at at least one further location, different
from the general location of affixing, affixed to the web.
In connection with the technique known as such, wherein
through a dispensing nozzle adhesive is applied onto the
card just before it is glued onto said web, usually an
additional dispensing nozzle is therefor used in the apparatus.
According to an alternative solution cards could be
used which in advance have been provided with glue at a
location at a distance to the usual glue strip. As a rule,
a relatively small adhesive power is required to avoid
erection of the affixed cards, such that there is no risk
that the thus pre-glued cards web can not be taken from the
stock in the usual manner.
-
Thus the invention relates in a second aspect to
keeping the card flat lying onto the advancing web, particularly
in the area wherein the printing ink at the web is
not dry yet, or is wet such that there is a risk for smearing
by said retaining or bearing surface, different than
with the retaining or bearing surface known as such, such
that the latter can be eliminated.
-
Another aspect that is improved by the inventors is
the manner in which the adhesive is applied onto the card.
With the known technique a continuous stream of adhesive
exits the dispensing nozzle. Since the cards are supplied
as a continuous web and are separated just before application
of adhesive and affixing at the web (typically along a
line of weakness, such as tear perforation), thin threads
glue are released, depositing in the neighbourhood and
causing contamination and malfunctioning. To solve this
problem, the inventors have designed to frequently interrupt
the lime strip, preferably such that the glue does not
extend over the separation line between two cards.
-
Still a further aspect which the inventors have improved
is the manner in which a card is transported towards
the advancing web. With the known cards affixing apparatus
use is therefor made of a vacuum drum against which the
card is kept by suction and is pressed onto the web. A
disadvantage of a vacuum drum is that it is rapidly contaminated.
The inventors propose to make use of a cards
transport system without the application of suction. According
to a preferred embodiment the card is therefor sandwiched
between two elements, e.g. a rotating drum and a
transport belt moving there along and in that manner transported
towards the advancing web.
-
The invention also relates to automatic affixing cards
onto a web wherein the cards contain an adherend strip
which allows temporary fixation to a surface, i.e. of the
"repositional adhesive" type, such as used for "Post-It"
notes. As a rule, this "repositional adhesive" features,
that it adheres better to the substrate (here: the card)
than to the surface on which the substrate is easily removable
adhered, particularly such that no or hardly any
adhesive remains remain at said surface if the substrate is
removed therefrom, while the adhesive also has the property
that the substrate can be adhered a plurality of times to a
surface, such as an abject of metal, plastic, glass or
ceramics, without any or only slightl loss of adherence. In
this connection a continuous web of such cards is proposed,
preferably mutually connected through a line of weakness,
preferably packed in a container as a plurality of adjacent
"fan folded" stacks, which container package can be designed
as disclosed in EP-A-0.441.136 or EP-A-0.763.491, both
incorporated in here by reference. Preferably the adhering
strip of "repositional adhesive" at the card is covered by
a release strip, with which the card is affixed onto the
web, preferably by an adhesive which is preferably applied
just before the card is applied. It has come out that with
this releasing strip a reliable automatic affixing cards is
possible at the typical processing speed of 80,000 of more
cards per hour. The invention also relates to a card with
an adhering strip and release strip thereon, wherein said
adhering strip is of an adhesive different from "repositional
adhesive", such as the typical hot melt glue with
which the card is glued to the web, and also a web comprising
a plurality of such cards.
-
The invention is further exemplified by way of a presently
prefered embodiment as shown in the drawing, which
is not meant to limit the scope of the invention. In the
drawing shows:
- fig. 1 a side view of the most important components of
a cards affixing apparatus.
- Fig. 2 a part of a string of cards in top view.
- Fig. 3 a part of a string of cards in side view.
-
-
The illustrated cards affixing apparatus 1 is part of
a rotation printing installation (not shown; e.g. for deep
print, offset or cold set) for printing newspapers, magazines,
etc, at a location such that the paper web 2, coming
from a supply roll and printed by printing rolls, passes
through the apparatus 1 according to the indicated dashed
line and in the direction of the arrow, on its way to the
downstream cut, bind and completion stations, etc. At
arrival at the apparatus 1 the web 2 contains printing
repeating over a predetermined length, wherein said repeating
length corresponds to a page or whole multiple thereof.
Pre-printed cards 3 are also supplied to the cards
affixing apparatus 1 as a single array of cards 3 (see fig.
2), formed into a continuous string 4, advancing in the
direction of the arrow. Within said string 4, the cards 3
are mutually connected by a tear perforation 10. The cards
contain also a tear perforation 20 (possibly eliminated)
parallel to and a a small distance from the longitudinal
edge 21. Within the apparatur 1 the front card 3 of the
string 4 is each time pulled loose along the tear perforation,
after adhesive is applied onto said card 3, whereafter
said card 3 is adhered onto the web 2. Said adhering is
carried out such that at each repeating length of the web 2
a card 3 is adhered at substantially the same location
(viz. e.g. fig. 2 of EP-A-0.949.178).
-
The cards 3 of the string 4 can be provided with an
array of registration holes 9 (viz. fig. 2) parallel to the
longitudinal edge 21, but they can also be eliminated.
-
The string 4, supplied from a supply roll (not shown)
passess over free rotating guiding rolls 5, 6 and then
arrives into the gap between the driven rotating driving
drum 7 and a backing roll 8, such that the string is friction
fed by the driving drum 7 and thus is pulled from the
supply roll. Two dispensing nozzles 11 subsequently apply
adhesive onto the string 4 advanced by the driving drum 7.
The one dispensing nozzle 11 dispenses only for a short
period for each card 3, such that a small spot glue 12
arrives near a corner at the card 3 (viz. fig. 2). With the
other dispensing nozzle 11 a glue strip 13 (either continuous
or discontinuous) is applied onto the area between the
longitudinal edge 21 and the tear perforation 20 (thus at a
distance from spot 12; viz. fig. 2). The glue strip 13 is
always discontinued at the location of the tear perforation
10, such that when the cards 3 are pulled loose from each
other, no glue threads are released. It will be appreciated
that according to the illustration of fig. 1 the nozzles 11
are behind each other, such that only one is visible. Also
it will be appreciated that they mutually keep a spacing
which at least substantially equals the spacing a of fig.
2. Also other locations for the dispensing nozzles 11 are
feasible, indeed or not aligned crosswise of the string 4.
-
Subsequently the string 4 moves through the gap between
superdjacent guiding plates 14, 15 and then arrives
in the gap between a rotating driven application drum 16
and a transporting belt 22 advancing with the drum 16 and
pressing the string 4 against the drum 16 over a radial
circumference part thereof (e.g. at least 10/), such that
the string 4 is friction fed by the drum 16. The speed of
the periferal surface of the application drum 16 is higher
adapted than that of the peripheral surface of the driving
drum 7, while measurements are taken that between string 4
and driving drum 7 or application drum 16, respectively,
there is no or virtually no slip (0.1 mm at the most,
preferably 0.02 mm at the most, most preferably 0.01 mm at
the most for one or both drums 7, 16), such that in the
part between the drums 7, 16 a high pulling forces acts on
the string, such that it breaks along a tear perforation,
such that the front card 3 is separated from the string 4
in the area betwene the drums 7, 16. It will be appreciated
that the free length of the string 4 between the drums 7,
16 equals a double card length at the most.
-
According to this embodiment the drum 7 has no registration
pins, or else, projecting from its circumferential
surface, which are designed to positively engage the cards
3, e.g. by penetrating the registration holes 9. According
to an alternative embodiment the drum can indeed be provided
with such registering means. In such case said registration
means at string 4 and drum 7 ensure slip avoidance
between drum 7 and string 4, and the friction feed between
string 4 and drum 7 has no meaning to avoid said slip, such
that said roll 8 can be eliminated in such embodiment. The
backing roll 8 can possibly be replaced by a different
(pressing) means to provide at least substantial slip free
friction feed between drum 7 and string 4, such as with a
backing belt comparable to belt 22, keeping a constant gap
width with the drum over e.g. at least 10° thereof. The
belt 22 can also possibly be replaced by a different (pressing)
means to provide at least substantial slip free
friction feed between drum 16 and card 3, such as a roll
comparable to backing roll 8.
-
For synchronising the advancement of the card 3 and
the web 2, to be able to affix the card 3 always at the
right location onto a repeating web length, the apparatus 1
contains between de drums 7, 16 a detector 17 provided by a
light sensor 17a and a light beam generator 17b, wherein
said light beam from generator 17b is interrupted by a
passing card 3, which is detected by the sensor 17a. Thus
the location of the front edge of the first card 3 of the
string 4 between the drums 7, 16 can reliably be determined.
The detector 17 also counts the number of cards, and
also controls the dose of the nozzles 11.
-
While the separated card 3 at the outer circumference
of the drum 16 is advanced by the latter, the card 3 arrives
with its glued side against the web 2, advancing
through the gap between de drum 16 and the free rotating
backing roll 24, adheres thereto and leaves together with
the repeating web part the apparatus 1. Since the card 3
with the spot 12 en the glue strip 13 is adhered onto the
web 2, the card 3 will reliably remain lying flat onto the
web 2 and not erect therefrom.
-
The controlling of the apparatus 1 is such that the
peripheral surface of the drum 16 moves as fast as the web
2. Therefor the control receives information about the
speed of the web 2 from the printing press, and adapts the
speed control of the drum 16 accordingly. The speed of the
peripheral surface of the drum 7 is controlled by the
control in dependence from the location of the card 3 as
detected by the detector 17, to ensure that the card 3
arrives at the right location onto the web 2. It will be
appreciated that the speed variation of the drum 7 for this
synchronisation is relatively small compared to the mean
speed of this drum 7, and is e.g. 20% of said speed at the
most.
-
The string 4 of fig. 3 has a strip 18 of "repositional
adhesive" covered by a releasing strip 19. The strip 18
will typically extend along a longitudinal edge, such as
the glue strip 13 of fig. 2, and different therefrom could
continue over the tear line 10 (the location of which is
indicated with arrows). the tear line 10 preferably also
continues through the releasing strip 19. According to an
alternative the strip 19 is interrupted at the location of
the tear line, possibly with inner spacing. The string 4 is
fed through the apparatus such that a dispensing nozzle 11
applies glue onto the side of the releasing strip 19 faced
away from the string 4, with which glue the card 3 separated
from the string 4 is affixed onto the web 2. As such
the card 3 can easily be removed after being affixed onto
the web 2, wherein the releasing strip 19 remains at the
printed matter, while the released card can immediately be
adhered to a support by using the "repositional adhesive".
The tear line 20 can be eliminated. It will be appreciated
that the material thicknessess, particularly of the adhesive
10, are shown exaggerated.
-
Possibly the strip 19 is elminiated at each second
card 3, such that a card 3 without strip 19 is immediately
affixed onto the web 2 by the adhesive 18. According to
another alternative the strip 19 is removed as soon as the
string 4 is taken from the supply, such that each card 3 is
immediately affixed onto the web 2 by the adhesive 18, such
that in such case the nozzles 11 remain out of use. It is
even possible that the string 4 is packed into a supply
without the strip 19.
-
It is also possible to feed towards the apparatus 1 a
cards string 4, already containing the glue dots 12, e.g.
as "repositional adhesive". Within the apparatus, only the
lime strip 13 has to be applied, either immediately onto
the card (fig. 2) or onto the strip 19 (fig. 3). This is
applicable with cards with or without adhesive 18.
-
It will be clear how the several parts of the apparatus
1, coming into contact with the cards 3 and web 2, must
be designed to provide sufficient friction feed, e.g. by
ensuring a rough surface or a proper (longitudinal) guidance
without e.g. smearing of printing ink or glue takes
place. This is also evident from US-A-4.351.517 and EP-A-0.948.178.
-
It must be clear, that starting from this disclosure
or obvious developments therefrom, further variants based
on this knowledge also belong to this invention, e.g.
arrived at by eliminating and/or replacing by an equivalent
aspect of one or more aspects of the above described or
therefrom derived embodiment, or combination of one or more
aspects of a one such embodiment with one or more aspects
of one or more other such embodiments.
-
Also an embodiment belongs to the invention, wherein
the cards after affixing are kept flat lying by guiding the
web with the cards affixed thereon along a retaining surface
with preferably an own driving means and advancing with
said web, e.g. a part of the endless loop 23 of fig. 1, at
the web side facing the cards, wherein said retaining
surface preferably advances with a speed adapted to the
speed of the web such that smearing or different quality
loss of the printing onto the web due to contact with said
retaining surface is reliably avoided. E.g. those speed are
equal or the mutually differ not more than 10%.
-
The invention can be applied with deep press, heat-offset
or cold-offset, particularly of the rotary press
type. For newspapers cold-offset is applied, wherein solvent
free ink is used, and the printed web passess no
drying chamber.