When you do want to print on the flap itself, and the
corner card will run over more than one different layer of paper, it is
customary to take ane envelope for the lot you are going to use and with
the point of a knife or a pin, punch small holes through the tympan one at
each upper corner and one at lower right hand corner. Take an impression
of the work to be printed on the envelope on a single sample. This must be
cut out so that when the cut envelope and an uncut envelope are laid on
each other, the number of paper thicknesses at all points will be the
same. Thus at points A, on figure 1 of the illustration, there ae four
thicknesses of paper, and all the other points must be built up to this
figure. Where the flap goes over at points B and C, there are three
thicknesses, requiring one more to make up to the maximum four, and points
I, E, and F, having only two thicknesses to equalize, require only two
These cut-outs and thicknesses must be cut exactly, and it
is therefore necessary to know just where the paper laps over. This can be
ascertained by running a lend pencil at right angles with the joint, the
same as you would take a rubbing of a coin.
You are now ready to cut out the skeleton envelope. A,
having the greatest number of thicknesses, is cut out entirely. B and C
having the next largest number, should have all but the front thickness
cut away. D, E, and F have only two thicknesses, and are therefore left.
Paste the envelope thus prepared face up on the tympan
sheet directly under the top sheet, being careful to match it with marks
previously punched. If this is done correctly, you can print envelopes
without any difficulty.
shows through distinctly on the back.
Proper Care of Type:
Proper care of type insures long and satisfactory service.
Great care must be used not to subject it to unnecessary pressure and that
every letter and point in a form is carefully planed down, that it may not
be worn by the extra pressure coming from being higher than the others.
Never print a card with an impression so heavy that it shows through
distinctly on the back. The same rule applies to paper to a certain
extent, though in printing a full form of small type so much packing must
be used on the platen that the type will usually emboss through slightly.
Never allow ink to harden on type; wash it off as soon as
taken from the press and distribute it as soon as your job is finished.
Type left standing around is very apt to be hit and the face broken.
Type should always be cleaned at once after using. Remove
form from press and before unlocking, take a rag wet with benzine or
gasoline and carefully wipe the faces of the whole until no ink or dirt
remains. For those who don't wish to use highly inflammable liquids such
as benzine and gasoline. we recommend our Printoclene care must be used
not to subject Wipe furniture, chase and all parts of it to unnecessary
pressure and that the hich is listed in the catalog. Use a small, stiff
brush if the type is badly filled up. Wipe furniture, chase and all parts
of the form, as well as the type, with benzine until everything is
perfectly clean. In case ink gets dry and hard in the type, make a
solution of our alkali cleaner preparation and use according to directions
on the can.
How to Take Care of Rollers:
Ink rollers are one of the most important parts of your
printing press, and in order to produce good printing, it is very
important that you take care of your rollers as outlined in these
instructions. Rollers should be much like the human skin in feeling. They
are extremely susceptible to heat, cold and varying degrees of moisture in
the air. On damp, muggy, summer days, rollers will absorb moisture, become
water-logged, and will not distribute ink satisfactorily. When a roller is
in this condition, it becomes soft and will increase from 1/16 to 1/8 of
an inch in diameter. To overcome this condition, wipe off the rollers very
carefully--so as not to spoil the surface--many times with a cloth wet
with alcohol, or in really bad cases, cover the rollers with powdered
alum, rubbed on with the hand. Let them stand for a while and wipe with a
DRY cloth. If the rollers are only slightly swelled and appear to be tough
enough to stand use, you can wind a little bicycle or electric tape around
the roller wheels to make them approximately the same diameter as the
In the winter time, conditions are just reversed. The
atmosphere is cold and dry, your print shop is heated, the moisture dries
out of your rollers and they in turn harden up and shrink in size.
Oftentimes, a roller in this condition may be brought back by coating it
over with a mixture of one part alcohol and one part glycerine, letting it
stand near a pan of water several hours.
To partly compensate for these two extremes, we have two
kinds of rollers, winter and summer grades. The summer
rollers are made much harder than the winter rollers to help overcome the
difference in humidity.
In some localities, where the climate is always humid or
always dry the year round you may need either summer rollers all year, or
winter rollers all year, regardless of the calendar. Printers in the San
Francisco Bay region say that they get the best results with hard rollers
in winter and soft rollers in summer, because of greater humidity in
winter than summer. In warm dry climates such as Arizona and New Mexico, a
winter roller will work well. If you do not want the rollers normally sent
out because of these varying conditions, PLEASE SPECIFY WHEN YOU ORDER
But, no matter how we make the rollers, you must do your part.
After use, rollers should be carefully cleaned at once while the ink is
still fresh and easily removed. Use Printoclene, thin machine oil, or
kerosene and a cloth to soften and wipe off the ink. After the rollers are
thoroughly cleaned, give them a heavy coating of machine oil and stand
them up vertically on a bench board or in a box. If you will be sure to
keep them covered with machine oil when not in use, they will not only
last longer, but will be in the proper condition when you want to use
them. Note--When coating rollers with oil to keep them from shrinking or
swelling, coat the ends also. (Be sure to coat over all of the
Kelsey plastic all-weather rollers are good the year round
in all climates. Plastic all-season rollers should be wiped clean,
and left without oil or grease on them. If you wish to wash up the rollers
and use them again right away, such as when you wish to change the color
or kind of ink, then and every six months, but do not throw only then is
it advisable to use benzine or gasoline. Kerosene, as well as machine oil,
is greasy and unless great care is used to wipe the rollers dry, some of
it is likely to be left on the rollers and spoil the next job you run. You
can tell when this is the case because the ink will appear greasy and the
rollers will not distribute the ink properly. If you expect to use the
press again within 24 hours, you can put a little machine or motor oil on
the ink table, run the rollers up and down over it a number of times, and
the ink on the rollers and table will stay soft so that it can easily be
cleaned off the next day. Don't let it stand longer than 24 hours,
If by any chance ink has hardened on rollers, try first to
wash it off with benzine or gasoline. If this does not do it, try benzol
or acetone or a mixture of the two. These fluids are commonly sold by drug
stores. Do not use except in extreme cases, as they have a tendency to dry
out and crack the roller surface.
Rollers work best in a temperature of 70 to 75 degrees. It
is advisable to keep your room as near this temperature as possible, and
have the heat on for at least an hour before printing, so that the
rollers, ink table and ink are thoroughly warmed up. If rollers are too
cold and hard to work, warm them carefully but DON'T leave them near
steam-pipes,etc.; if you do, you may find them melted out of shape when
To get the best results, new rollers should be put on your
press every six months, but do not throw away the old ones at once. Save
them to use when printing forms with sharp rule or leaders, and avoid
cutting up face of new rollers. Sometimes, in hot, muggy weather an old,
tough roller will work much better than a new one.
Keep several sets of rollers of varying degrees of
hardness on hand. It won't cost any more than using one set all the time.
Every climate is subject to changes by having rollers of various kinds,
you can use the ones best suited to the weather and the job. They will
save their cost many times over in time, stock, and results accomplished.