STATE PLANT BOARD
ET-175 July 1941
United States Dei:a -i' eiat of Agriculture
Bureau of Entomolc-y and Plant Quarantinc
FOOT-OPER'.- IED Pu.D CH
By W. G. BC.-.-'ley and O. E. Eerndt,
Division of Ce.r:;-c and Fora.-e insect investigations
The equipment herein de:crbd is c foo.--operte d or
punch:; g out disc r othr
at the Euro :. corn borer 'research ) oao Tolo Ohio for
stiamp:,.:g J:':,cs fro sheets. of ai'fin er or which egg masses
of the Europan corn borer een laid leering t.e size
and shape of the ..ch soud be useful for o r poses.
The 'le built ab ps 72" x
30". It is lare o ony for e prs f _rt. the
work be':-,, ..,.C. but io hold ac q .. a .a erial
and to provi' wo y o a cod o. atr vho handles
the staop-d-out discs.
The surface over which ai eets are moved mea-
sures 39" x 12" and is inclined at a nge to facilitate
observation of the -. sse and for Case i handle the work.
The table stands 2,", hi, ad s oted o a framework
made of 1" angle iron 1" x 1 x joints of which are welded.
C.,, l iro -i d .
Since (for the work for wic the corn borer egg :ses are
utilized) it is necessary that the paper di.sc be mounted on pins
for attachment to corn ts a r s provided coi s _
of a strip of cheesecloth 3-3/4" ed o bo ees and
actuated b, a hand-operated crank and cylinder mvin as an endless
belt throuj.i- a groove 4" wide This J c.. be s 3rted
throui hc,'it half its outward t ..verse d s rec e "
As oil r ci sbispse
copper screen, which supports the disc _i a pi b pushed
Ti-.e details of the punching mechanism are shown Ii figure i,
which is drawn to scale.
The stri-ping member (fig 1-\) of the punch consists of a
30" pi ece of cha_:,. '1 iron, 2" x 1" x This is welde o the-
bolster member (fig. 1-B) throughout 11 inches of its l-:-.:th, leav-
ing a spaze (fig. 1-?') 1/4" wide and 7" long at its lower end
-':'_ugh which the wo:-l is moved. In order to obtain the nec-:sary
etrem r idity of the bolster, it is made of T-iron, 2" x -"x -X
Deai.s of the foot-,perated treadle (fig. 1-L) and the spri.c re-
turn mec,-:. (fig. 1-H)- are shown in tI-, diagram.
Accu-.-te r iil.;.-. of the shearing punch (fig. l-J) .- its
die is essential for forming clean-cut discs. PFi.,--e 2 shows the
machine .:: '.j for operation.
In uing -te ,-.cl-e the operator mo"',: the sheet over the
inclined rt of the -ble through the slot until an is
centered ove -.e -aring p.o"ch. T.- posi- ionr is de&e .ed .y
io,:b _:.. hro: the die, the egg masses, which are lai on Y._ J
one ourface of he ,- per, being on the ii-:-r surface ..... the
punchig o, aion :: visible to the .-,-.rator en '- tr'; e
is the. .. .re the disc with it. attached :..mass is t out
and forced an. rd, and is removed with tweezer- Jrc.i the "..p of
the she-'. ch and placed on the conveyor. A tally (fj-,. 1-C),
fast-_eed to the ,i-._r end of the T-iron and actuatet3 as sh.- j. in the
dirram, ke. count of the number of e-. masses pu:-.cccJ out.
The use of this device greatly increased the output of
pinned discs. .',-rec operators, one punch,,:,r out the discs, and
the others pinning Ihcr;., can produce 10,000 pin!,,ed discs ;:,.r :'ay.
gure 19--Diauam showing @peratng mooe@num of fot-O.per ,od
punohl A, Otrppor. 8, Uoletz, C, T3ally. D, Lovor
opematng tlly, Punwh lever. F# Piach levem pivoa.
0, Blattd lever guide. H, Meumn @pring. I, lhlokle.
Jp Gbeowtng r un h. 1, Blot through which work to moved.
Li# Tr@adl@. X; Tre@d@ omecLting rods
Digitized by the Internet Archive
Figure 2.--Foot-operated punch for cutting out egg masses of the
European corn borer on discs of waxed paper.
UNIVERSITY OF FLORIDA
3 1262 09240 9308
3 1262 09240 9308