Year: 1885

page_text: -We JOSEPH RICHMOND and WALTER WHITING both of 30 Kirby Street, London,
Middlesex, Engineers do hereby declare the nature of our invention to be as
follows:-
The object of our invention is to arrange appliances in connection with an
envelope folding machine and principally to that known as the Leader Machine
so that the cementing or gumming of the envelope flap or flaps is effected by a
combined dabbing and reciprocating action instead of by a dabbing operation only
of the apparatus by which the cement is applied.
For the purpose of our invention we fit the two gumming appliances or pickers
on a bar attached to the rod by which they are raised and lowered simultaneously.
One of these guminers viz the back one which gums the back flap, is adjustable
and can be set to suit different sized envelopes that it is necessary to gum and fold
the other or front gummer or picker which gums the sealing flap being fitted
loosely on the bar and permitted to travel within certain limits in one direction
under the action of a lever operated by the presser plate when lifted by the
ordinary or any suitable mechanism a spring being at the same time compressed
which returns said picker in the reverse direction when the rod of the presser
plate returns or descends the lever being released from contact during such
descent.
The gummers are lowered simultaneously by suitable mechanism from a cam,
a crank or an eccentric and are brought down, after being gunmed, into contact
with the top blank of the pile, the movable gummer for the sealing flap being
a short distance within the edge of the sealing flap so that when the gumming is
effected thus far the spring rebounds and moves the sealing flap guinier to the
edge by a sliding action which deposits the gum in an effective manner.
gummers then lift and carry the top blank with them the gummers passing
through apertures in a dividing plate which separates the blank from them said
blank falling on to fingers or carriers which remove the gummed blank to the
presser plate.
The

page_text: COMPLETE SPECIFICATION.
Improved Means and Appliances for Cementing (Gumming) the
Flaps of Envelopes Mechanically.
We JOSEPH RICHMOND and WALTER WHITING both of 30 Kirby Street, London
Middlesex, Engineers do hereby declare the nature of our said invention and in
what manner the same is to be performed to be particularly described and
'ascertained in and by the following statement :-
The object of our invention is, to arrange appliances in connection; with an
envelope folding machine and principally to that known as the "Leader" Machine
so that the cementing or gumming of the envelope flap or flaps is effected by a
combined dabbing and reciprocating action instead of by a dabbing operation only
of the apparatus by which the gum or cement is applied.
For the purpose of our invention we fit the two gumming appliances which are
also pickers on a bar attached to the rod by which they are raised and lowered
simultaneously. One of these gummers viz the back one which gums the back
flap is adjustable on a bar and can be set to suit different sized envelopes or other
shaped gummer can be fitted.
The front gummer or picker which gums the sealing flap is fitted loosely on the
same bar and is permitted to slide within certain limits in one direction under the
action of a lever operated by the head of presser plate rod when lifted by
the ordinary or any suitable mechanism, a spring on the bar at the same time
being compressed which when released causes its gummer to slide on the paper
and yet keep in contact to act in conjunction with the other gummer as a picker.
The gummers are lowered simultaneously by suitable mechanism from a cam,
a crank or an eccentric and are brought down supplied with gum into contact with
the top blank of the pile. The movable gummer for the sealing flap is within the
edge of the sealing flap as a dabber and when the gumming thus far is effected the
spring being released moves the sealing flap gummer to the edge by a sliding
action which sinears or wipes the gum smoothly on the flap. The two gummers
then lift and carry the top blank with them the gummers passing through
apertures in a dividing plate which separates the envelope blank from them said
blank falling on to fingers or carriers which remove it to the presser plate..
The accompanying drawings show one arrangement of appliances by which the
gumming by our invention can be applied on the envelope blanks in succession at
each descent of the gummers into contact therewith.
•
Figure 1 is a side elevation partly in section of the apparatus in the position the.
parts occupy when the two gummers are on an envelope blank but with the spring
held at tension previous to the wiping operation.
Figure 2 is a similar view with the parts of the apparatus in the position they
occupy after the spring is released and the wiping effected the gummers being
ready as pickers when raised.
Figure 3 shows a front view of the seal flap gummer with its connecting levers.
A is the vertical stem working through the bridge piece B and having the
gummers C, D, connected thereto by means of another bar E projecting from each

page_text: side thereof. The gummer C is set fixed on the bar E in a position directly over
the inner flap of the envelope blank. The gummer D is fitted loosely on the bar E
and has a motion along it when its collar F is forced in by the bell crank or
equivalent lever G (which may be in two pieces) said lever turning on its pivot
pin H this being accomplished while both gummers are in their upward position
by the cross head I of presser plate rod J striking the end K while travelling
upwards or when descending by the end K of the lever G coming in contact with
the top bar or crosshead I of the presser plate rod J. The gumming of the two
gummers C, D is effected by gum rollers riding in contact in the ordinary manner.
The collar F is limited in its motion along the bar E by a key or cotter which
passes through the bar and a somewhat longer slot of the collar F.
Between the collar F and the bottom of the vertical stem A. is a helical or other
spring L which is compressed by the travel of the collar F and so soon as the two
gummers C, D, have descended on to the top blank of the pile, the gummer C
remains stationary but the gummer D has a retrograde or reciprocate action by
the recoil of the spring L this movement happening the instant the crosshead I is
removed from contact with the end K of the lever G. The sliding gummer is not
however removed from the flap but like the gummer C remains in contact and on
the next ascent they take the envelope blank up against the separating plate to
fall on to the feed fingers which carry it to the folders and presser which at the
next descent folds it, and the gummers C, D gums the next blank of the pile as
before explained.
It is not essential in every case that the lever G be acted upon by the presser
plate rod J or its cross head I as a distinct rod actuated by a cam can be fitted for
the purpose.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that
what we claim is
1. Fitting in or to an envelope folding machine a sliding gummer D movable
while in contact with the envelope flap as a picker.
2. The particular combination of appliances represented on the annexed drawings
and their method of action as and for the purpose described.
7711
A day or may 1000.
H. GARDNER,
Agent for the said J. Richmond & W. Whiting.