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Патент USA US2118410

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May 24,‘ 1938;
‘
w. J. LOFSTEDT
'
2,118,410 '
PLATE SHAVING MACHINE
_
Filed March 7, 1936
2 Sheets-Sheet l
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#49
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Wz/s/v 777R
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B
W. J. LOF'5TE'DT
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j TfU/QNE/
2,118,410
Patented May 24, 1938
UNITED ‘STATES PATENT GFFECE
2,118,410
PLATE SHAVING MACHINE
William J. Lofstedt, Portland, 0reg., assignor, by
mesne assignments, of two-thirds to Premier
Manufacturing and Sales Company, Portland,
0reg., and one-third to Ralph H. Mort
Application March 7, 1936, Serial No. 67,687
2 Claims.
This invention relates generally to the print
ers’ art and particularly to plate shaving ma
chines.
The main object of this invention is the pro
5 vision of an improved form of plate shaving ma
(Cl. 90-18)
pinion 23 which in turn meshes with a gear 24
secured to the shaft 25. The gear 22 meshes
directly with the gear 26 secured on the shaft 25.
Splined on the shaft 26 between the gears 2|
and 22 is a slidable clutch jaw, 21, the teeth of -
chine possessing certain advantages over the ma- 7 which are adapted to engage the jaw 28 on the
chine described in my copending application, Ser.
No. 742,378, ?led Sept. 1, 1934, Patent #2,064,l'72,
Dec. 15, 1936, among which is the provision of
a pneumatic chip remover, means for segregat
ing various kinds of chips, and a generally im
proved construction over that illustrated in the
patent application referred to.
I accomplishv this and other objects in the
15
‘manner set forth in the following speci?cation
as illustrated in the accompanying drawings, in
which:
Fig. l is a perspective View of the complete
machine with part of the chip hopper broken
away.
Fig. 2 is a section taken along the line 2—2
in Fig. 5.
Fig. 3 is a perspective view showing the revers
ing
mechanism.
, '
Fig. 4 is a fragmentary plan showing one end
the rock shaft 3! which is operated through the
10
bevel gears 32 from the rock shaft 33.
The shaft 33 is provided at one end with a
hand lever 34 and at the other end with an arm
35.
Mounted within the frame it) is a horizontal
shaft 36 which supports one side of a motor base 15
31 whose opposite side is supported by means of
a rod 36 which in turn is suspended from the
spring 36 which is carried by the side frame l0.
Upon the base 51 rests a motor 55 around whose
sheave Iii pass'the belts M which pass around ‘20
the multiple sheave 63 on the shaft 44 of the
spirally fluted cutter 45 which journals in the
standards 46 which in turn are supported by the
frame it.
The slide 42 is provided with a rectangular open 25
of the spiral cutter, the bed plate, and the side
and end stops.
Fig. 5 is a section taken along the line 5—5
in Fig. 1.
Fig. 8 is a section taken along the line 6-6
ing 6? along one end of which is mounted an
end stop 46 and along one side of which is mount
ed a side stop 49.
It is desirable to provide a cleaning space 50 at
the junction of the end stop 43 and the side 30
in
On the shaft 44 is also a grooved pulley 5| whose
belt 52 passes around a grooved pulley 53 whose
5.
7 is a plan‘of the indicating dial.
Fig. 8 is. a fragmentary section through .a por
tion of the oiling roll.
55
Fig. 9 is a fragmentary section of the chip
outlet duct showing a modi?cation wherein two
separate chip collectors are provided for wood
and metal chips.
to
gear 2| or the jaw 26 on the gear 22. The slid
able jaw 2'! is actuated‘ by means of a fork 36 on
Fig. 1!) is a section through the trip arm.
Similar numbers of reference refer to similar
parts throughout the several views.
Referring in detail to the drawings, there is
shown a frame in across the top of which is
formed a dovetail guide I l upon which is mount
45 ed a slide i2. To the slide [2 is secured a nut
53 through which extends a feed screw I4 whose
ends journal in the frame I6. On the screw I4
is secured a gear l5 which meshes with the gear
86 on the shaft H which journals in the frame
‘iii and-has secured on one end thereof a bevel
86 which meshes with a second bevel gear
is on the reversing clutch shaft 26 which jour
nals in the frame it.
On the shaft 26 are rotatably mounted the
gears ‘22! and 22, the former meshing with an idler
stop 59.
shaft 56 is mounted on a slotted quadrant arm
55 which is rockable on the shaft 25. To the
pulley 53 is secured a spur gear 56 which meshes
with a gear 51 secured on the shaft 25. The
pulley 53 is mounted on the quadrant arm 55
merely for the purpose of providing a convenient
tightener for the belt 52. Within the opening 41
is disposed a vertically slidable bed 58 which is
free to move in the corner formed by the stops
68 and 49. The bed 58 is provided with a pillar
59 which is slidable within the slide I2. On the
under side of the bed 53 is formedtheinclined edge 45
66 which rests upon the inclined edge 6| of the
slidable wedge 62 to which is secured a nut 63
through which passes the screw 54 which is man
ually‘ operated by means of a hand wheel 65.
A graduated dial 66 is provided on the screw
66 for fractional readings and a worm 6'! on the
screw 64 meshes with a worm wheel 56 on the
stud bolt 59. Integral with the worm wheel 68
is a pinion 16, which meshes with a gear ll which
in turn drives a sleeve 72. Frictionally mounted 55
2
2,118,410
in the sleeve ‘I2 is an indicating dial shaft 13 on
whose upper end is secured a hand or pointer 14
which lies above a dial ‘I5 which is protected by
a glass cover 15. The position of the pointer
‘M with relation to the setting of the screw 64
can be adjusted at will by means of the knurled
head ll.
Between the standards 46 is mounted a cutter
housing ‘I8 which is provided with an inspection
10 opening 19 over which is placed a closure 80.
The housing ‘I8 is provided with an inclined side 8|
along the lower edge of which is placed a chip
deflector 82 which consists of a plurality of spring
urged ?ngers which extend under the discharge
15 side of the cutter 45 and are urged downwardly
upon the plate 83 by means of the springs 84. At
the upper edge of the inclined side BI is a chip
outlet opening 85 which is connected by means
of a manifold 85 to the intake side 81 of the
20 blower fan 88. The manifold 86 has its side 89
sloping to facilitate the movement of the chips
from the cutter 45 into the fan casing 90 from
which they are discharged through the duct 9!
into the head 92 which is removably placed over
25 the wheeled can 533 into which the chips 94 are
deposited. The head 92 is provided with a cen
tral opening 55 from which the air can escape.
In some cases, for example, when wood and metal
plates are to be shaved alternately, it is desirable
to provide an additional can 95 and to separate
the pipe 9i into two outlets 9'? and 98 and to
control the flow of air to either of the outlets
by means of a damper 99 which is controlled by
a hand lever I05. The fan 88 is provided with
35 a drive pulley till whose belt N32 is driven from
the sheave I03 on the shaft 44.
.
Journaling under the manifold 86 is a trun
nion I04 on one end of which is secured a lever
I85 which is joined by a connecting rod I06 to
40 the arm 35. On the trunnion I04 is secured a
trip arm I8? which is of a su?icient length to
clear the top edge E88 of the end and side stops
43 and 49 plus the thickness of the maximum
cut intended to be taken. Hingedly attached to
4:5 the trunnion I94 are the arms I99 to which is
attached the oiling .roller Ill) which is prefer
ably of felt mounted on a perforated sleeve III.
On the shaft 33 is secured a bevel gear II2
which meshes with a bevel gear I I3 on the shaft
50 5 HI to which is secured a segment gear I I5 which
meshes with a rack H6 on the vertical plunger
III’ on whose upper end is secured a head I I8
whose upper and lower sides I l9 and I20 are bev
eled to facilitate their engagement with the trip
55 locks i2I and I22 which are secured on the slide
I2.
A cutting lubricant such as kerosene is stored
in the cup 623 which communicates by means
of the pipe I24 with the sleeve I I I. It is desirable
60 to permit the pipe I24 to slide vertically with re
lation to the manifold 86 in order that the roller
! I8 may move.
The operation of the device is as follows:
A plate 83 is placed on the bed 58 against the
65 steps 28 and 49.
The motor 48 is then operated
through the closing of a switch, not shown, caus
ing the cutter 45 to rotate rapidly and also caus
ing the shaft 25 to rotate, thereby revolving the
gears 2i and 22 in opposite directions, also per
70 mitting the shaft 29 toremain idle by reason of
the fact that the jaw 2? is in a neutral position.
A movement of the hand lever 34 in one direc
tion will cause the jaw 2'! to engage the jaw 28
and thereby impart rotation to the feed screw
75 it, causing the slide 52 to move along the guide
II and move the plate 83 under the trip arm I01
and under the roller I I [I as well as under the chip
de?ector 82 after which the plate 83 comes into
engagement with the spiral cutter 45. The plate
is then shaved to a thickness determined by the
setting of the hand wheel 65.
'
It will be noted that the action of the spiral
cutter 45 is such that it holds the plate 83 ?rmly
against the bed 58 as well as against the stops
48 and 49, thereby rendering unnecessary the use’
of any special clamps for holding purposes.
When the slide I2 has moved to a distance at
which the trip block I22 will engage the side I20
of the head H8, it will cause the rack H6 to rise
and automatically move the lever 34 to a neutral 15
position from which the lever 34 can be moved
only toward a reversing position by a manual
operation thereof. This will cause the slide I2
to return to its starting point at which time the
trip block I2I will engage the upper side II9 of 20
the head IIB, thereby returning the jaw 21 to a
neutral position.
If the plate 83 is thick enough to engage the
trip arm I01, that is, when an attempt is made
to take an excessively deep cut, this will cause 25
the connecting rod I86 to rise, also moving the
jaw 21 to a neutral position.
In some cases, it will be found desirable to pro
vide a vibration absorbing roller I25 adjacent
to‘ the cutter 45 on the side opposite the roller 30
H0.
'
It will be understood that none of the mem
bers I01, III), 82, or I25 serve to hold the plate
down upon the bed 58. This action is accom
plished entirely by the cutter 45 itself. It will 35
be noted that the chips 94 which are removed by
the cutter 45 are de?ected upwardly by the mem
bers 82, the action of the cutter 45 being such as
to cause them to'move obliquely toward the fan
88 and thereby be discharged into the container 40
93. Or, if the arrangement shown in Fig. 9 is
employed, the chips 94 may be de?ected into
either of. the cans 93 and 96 by the operation of
the hand lever I00.
Referring to Fig. 10, it will be seen that the 45
trip arm I0‘! is slidable within the bar I26 and
the arm I0‘! is urged downwardly by means of
springs I21 on the bolts I28 which are slidable
Within the bar I225. The bolts I21 are provided
with the nuts I29 for .adjusting purposes.
50
It is desirable to bevel the face I30 of the
trip arm I01 as shown. The bar I26 is provided
with the trunnions I04 which also form centers
for the arms I89 of the oiling roller III). The
purpose in making the trip arm I01 yieldable is
to prevent it from biting into the plate 83 when
it is withdrawn.
While the roller IIO has been referred to as
an oiling roller, it also serves as a holddown roller
for the rear end of the plate to prevent it from 60
tipping up when its forward edge engages the
chip de?ectors 82 and its dual purpose must be
so understood.
I claim:
1. A plate shaving machine having in combi
65
nation a vertically adjustable horizontally mov
able bed plate, a driving means for slidably mov
ing said bed plate, side and end stops associated
with said bed plate, a spiral cutter mounted over
said bed plate, chip deflectors disposed along said 70
cutter, an oiling roller disposed in advance of
said chip deflectors and a trip arm disposed over
said bed plate together with a clutch interposed
between the drive mechanism and a source of
power actuated by said trip arm whereby a plate 75
3
2,118,410
of excessive thickness will cause said drive mech
anism to move to a neutral position.
2. A plate shaving machine having in com
bination a frame, ahorizontal guide disposed on
CH said frame, a slide mounted on said guide includ
ing means for driving same in either direction,
a clutch interposed in said drive means, a bed
plate vertically adjustable Within said slide and
projecting through the top thereof, side and end
10 stops for said bed plate mounted on said slide,
a spiral cutter mounted over said bed plate, a
vibration absorbing roller on one side of said
cutter and a chip deflector on the opposite side
thereof, a chip collecting manifold associated
with said chip de?ector, an exhaust fan having
its inlet communicating with said manifold and
a trip arm disposed under said manifold includ
ing operating connections to said clutch whereby
the passage of a plate of excessive thickness under
said trip arm will cause said arm to move said
clutch to a neutral position.
WILLIAM J. LOFSTEDT.
10
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