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Патент USA US2105254

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.
Jan. 11, 1938.
2,105,254
L. R. MARTIN
FILM‘GUIDE FOR FILM MAGAZINES
Filed Dec. 26, 1935
27
29'
INVENTOR
'
1w,
M
LeuDreuceRMm' 1'
BY 1%
d
ATTORNEY .
2,105,254
Patented Jan. 11, 1938
‘UNITED "STATES PATENT
_
OFFICE
2.105.254
mm some sort FILM mcsznms ‘
Lawrence B. Martin, Rochester, N. Y., assignor,
by meme assignments, to Eastman Kodak Com-
,
pony, Jersey City, N. 1., a corporation of New > -
Jersey
Application December 26. 1935, Serial No. 56,200
8 Claims. v(cl. sa-m
The present invention relates to'a guide means
within a ?lm magazine and more particularly to
a guide member located between a portion of a
- preformed ?lm loop and one of the ?lm rolls
'
5 within the magazine.
?lm rolls. within-a magazine so that the space
initially occupied by one ?lm roll is subsequently
partially'occupied by the other ?lm roll. Such
10 an arrangement contributes directly to a com
pact design for a double ?lm magazine.‘ For
reliable-operation'of a ?lm magazine it is also
quite desirable to provide a preformed ?lm loop
within the magazine and through which loop the
15 film is moved intermittently. Owing to the
proximity of the ?lm rolls in the aforementioned
‘type of magazine‘there is considerable possibility
of the ?lm in the loop becoming prematurely
wound upon one of the ?lm rolls.’
I
The primary object of the present invention is
‘
the provision in a ?lm magazine containing a
?lm roll and a preformed ?lm loop of a guide
member which is movably mounted between the
?lm roll and the ?lm loop to prevent premature
25 winding of the ?lm in the loop upon said ?lm
roll.
‘
.~
'
-
Another object of the invention is the provi
sion of a guide member which has ?lm guiding
margins along each edge-of the guide member
30 and which margins may engage the perforated
margins of the ?lm strip to perform the afore
mentioned separating iuncti'on without abrasion
' 5
Fig. .3 is a side view of another ,form' of the
guide member which has sinuous ?lm-engaging
margins along each edge thereof.
‘
Other objects of the invention will be sug
vgester to those skilled in the art by the descrip
_ tion which follows.
*
The aforementioned and‘ other objects of the
-
Fig. 4 is a cross section through the guide
member of Fig. 3 and'taken on the line 3-3 of ill
Fig. 3.
‘ Fig.‘ ‘,5 is a side view of still ‘another form of
the guide member.
Fig. 6 is a cross section taken on the line 0-0 4
ofFig.
5.
‘
'
'
'
‘
The present invention is to be described with
respect to a double ?lm magazine containing a
pair of ?lm rolls and a preformed ?lm loop be- '
4 cause the advantages of the guide member are
best understood in connection with a ?lm maga- 2°
zine in which a portion of the space previously
occupied by one ?lm roll is subsequently occu
pied by the other ?lm roll.
3
-
'
The ?lm magazine ‘may comprise a casing l0
having a side wall ii and av lateral wall I2. A
spindle I3 is mounted upon said side wall‘ II and
supports a ?lm core ll upon which the supply
?lm roll I5 is wound. The original diameter of
the supply ?lm roll l5 isv indicated bythe dot
dash circle of Fig.1. A second spindle I6 is also 30
mounted upon said ‘side wall II, and supports a
take-up ?lm core l1 upon which is wound the
or scratching‘ of- the central portions or picture . take-up ?lm roll l8.
areas of the ?lm strip.
.
Fig. 2 is a cross section through the preferred
form of the guide member and taken on the line
A-A of Fig. 1.
_ 1- It is-customary to locate ‘and proportion the
20
gins and movably mounted between the ?lm
in the ?lm loop and the ?lm roll.
The original diameter of
the take-up ?lm roll i8 corresponding to‘ the
original diameter of the supply ?lm roll i5 is also as
shown by a dot-dash circle.
A ?lm moving means for maintaining a pre
formed ?lm loop in the ?lm is also mounted
within the magazine and by way of example only
‘magazine containing a ?lm roll and a preformed is here disclosed as comprising a sprocket i9 40
?lm loop of a movably mounted guide member mounted for rotation with respect to the side
wall II and a pair of guide rolls 20 rotatably
which has offset margins for engaging the per
forated margins of the ?lm strip and for sepa _mounted adjacent the periphery of sprocket I 9
5 rating the ?lm in the loop from the ?lm roll so upon a pair of posts 2| which are attached to
u‘
that the ?lm cannot be prematurely wound upon side wall Ii. A ?lm guideway in which the ?lm is supported
the roll. The ?lm engaging margins of ‘the guide
for exposure may comprise a presser pad 22 re
member may be provided in any of several dif
siliently pressed against the front portion of lat
ferent ways. as will be subsequently explained.
eral wall l2 by a spring member 23 .which bears
50 Reference is hereby made to the accompany
upon a pair of studs 24_ on side wall I l'.
ing drawing in which similar reference char
The guide member of the present invention is
acters designate similar elements and in which:
advantageous when used in conjunction with the
Fig. 1 isa plan view of a ?lm magazine con
standard ?lm path for a-preformed loop within
taining a ?lm roll and a preformed ?lm loop a ?lm magazine but is particularly advantageous
55 and a guide member having ?lm-engaging mar
within a ?lm magazine in which the ?lm F passes 66
‘ 4o invention are attained by the provision in a?lm
9,105,954;
2
from the ?lm supply roll l5 around the ?lm mov
ing means, in a preformed ?lm loop F’ through
the ?lm guideway, and again over the ?lm mov
ing means to the take-up ?lm~roll ii. The origi
nal position of the ?lm loop F’ in a fully loaded
?lm magazine is disclosed in dot-dash lines in
‘Fig. 1 and may lie over the outer convolution of
the full supply roll 15 indicated by a dot-dash
circle. Under these conditions the ?rst layer of
?lm from the ?lm moving means may become
wound upon the take-up ?lm roll l8 especially if
the ?lm magazine has been stored for any ap
preciable length of time so that the'?lm has be
come set around the ?lm moving means.
15
In order to prevent this premature winding of
the ?lm upon one of the ?lm rolls, a guide mem
ber is movably mounted between the ?lm loop
F’ and one of the ?lm rolls. The guide member
25 is rotatably mounted upon a spindle 25 which
20 is fastened to the side wall H of the magazine.
Said guide member 25 may assume the position
shown by the dot-dash lines of Fig. 1 when the
magazine is ‘fully loaded or may be rotated
around spindle 26 as the diameter of the take
25 up ?lm roll increases.
.
In any event said guide member 25 will pre
vent any of the ?lm within the magazine or in
the film loop F’ from becoming prematurely
wound upon take-up ?lm roll l5. In performing
30 this function the guide member 25 may be in con
tact simultaneously with the outer convolution of
take-up ?lm roll l8 and the ?lm loop F’ or may
under some conditions be in contact with only
one of these ?lm portions. However, it is quite
35 essential that some provision be made to prevent
abrasion of the central portions or picture areas
of either of these ?lm strips and this object may
be accomplished by various formations for the
guide member 25.
40
In its preferred form the guide member 25
in any other way that is deemed desirable. The
guide member 25 which is provided with pimples
34 may also be mounted for movement within the
?lm magazine around the spindle 25 and will
function in the same manner as does the pre
ferred form of the guide member 25.
All forms of the guide member 25 are shown
with a longitudinal curvature but such curvature
is not necessary to the principal purpose of the
guide member although it does providela more
convenient form thereof.
Since many other forms of the guide member
other than those disclosed are possible, such other
forms as come within the appended claims are 15.
to be deemed to be within the scope of the pres
ent invention.
Having now particularly described my inven
tion what I desire to secure by Letters Patent of
20
the United States and what I claim is:
1. In a film magazine, the combination with
a casing adapted to contain a supply ?lm roll, a
takeup ?lm roll, and a ?lm strip therebetween,
mounting means for supporting said ?lm rolls so
that some of the space occupied by the supply 25
?lm roll is subsequently occupied by the takeup
?lm roll, and a ?lm moving means for maintain
ing in said ?lm strip a pre-formed ?lm loop with
a portion of said ?lm strip between said ?lm
rolls, of a guide member mounted to move be 30
tween said ?lm loop and one of said ?lm rolls and
for preventing the ?lm strip forming the ?lm loop
from being wound prematurely upon said one
?lm roll.
'
2. In a ?lm magazine, the combination with a 35
casing adapted to contain a supply ?lm roll, a
takeup ?lm roll, and a ?lm strip therebetween,
mounting means for supporting said ?lm rolls
so that some of the space occupied by the supply
?lm roll is subsequently occupied by the takeup 40
comprises a body portion 21 which is provided ‘ ?lm roll, and a ?lm moving means for maintain
with ?lm-engaging margins composed of offset
portions 28 and 29 along each edge of said body
portion 21. The portion 28 is offset in one direc
45 tion from body portion 21 along one edge thereof
while portion 29 is offset in the opposite direction
along the other edge of body portion 21. Thus
the offset portion 28 will engage only a single \per
forated margin of the outer convolution on the
50 take-up ?lm roll I8 while portion 29 will engage
only the opposite row of perforations in the ?lm
loop F’. This form of the guide member 25 is
preferred because it is simple in design and easy
to . manufacture.
55
tion as disclosed in Fig. 6 but may be provided
Another form of the guide member 25 is. illus
trated in Figs. 3 and 4 and comprises a body por
tion 30 having a sinuous ?lm-engaging margin 3|
along one edge of said body portion 30 and a
sinuous ?lm-engaging margin 32 along the other
60 edge of body portion 30.
Said sinuous ?lm-en
gaging margins 31 and 32 are shown as being out
of phase principally to facilitate their illustra
tion. The guide member including the sinuous
margins
3| and 32 may engage both perforated
65
margins either on the ?lm on the take-up ?lm roll
it or in vthe ?lm loop F’, or may engage both
of these‘ ?lm strips simultaneously and is mount
ed for movement similarly to the preferred form
of guide member 25 upon the spindle 26.
70
Still another form of the guide member 25 is
disclosed by Figs. 5 and 6 and includes a body
portion 33 with a plurality of pimples 34 along
each margin of said body portion 33. The pim
ples
M are preferably provided in staggered rela
76
ing in said ?lm strip a pre-formed ?lm loop
which encircles one of said ?lm rolls with a por
tion of said ?lm strip between said ?lm rolls, of
a guide member mounted to move between said
portion of the ?lm. loop and the takeup ?lm roll
and for preventing the ?lm. strip forming the
?lm loop from being wound prematurely upon
said takeup ?lm roll.
3. In a ?lm magazine, the combination with a 50
casing adapted to contain a ?lm roll and a ?lm
strip, and a ?lm moving means for maintaining
in said ?lm strip a pre-formed ?lm loop with a
portion of said ?lm strip adjacent to said ?lm roll,
of a guide member movably mounted between 55
said ?lm roll and said portion of the ?lm strip
and for preventing said portion of the ?lm strip
in the ?lm loop from being wound prematurely
upon said ?lm roll, said guide member including
?lm engaging margins on each face thereof and
for engaging only the margin of the ?lm in said
portion and on said ?lm roll.
4. In a ?lm magazine, the combination with a
casing adapted to contain a ?lm roll and a ?lm
strip, and a ?lm moving means for maintaining
in said ?lm strip a pre-formed ?lm loop with a
portion of said ?lm strip adjacent to said ?lm
roll, of a guide member movably inounted be
tween said ?lm roll and said portion of the ?lm
strip and for preventing said portion of the ?lm
strip in the ?lm loop from being wound prema
turely upon said ?lm roll, said guide member in
cluding a body portion and ?lm engaging mar
sins which are provided along opposite margins
‘2,105,254
‘ of said body portion and which are oiiset in oppo
rections from said body portion and for engaging
only one margin 01' each ?lm.
7. In a ?lm magazine, ‘the combination with a
’ 5. In .a ?lm magazine, the combination with casing adapted to contain a ?lm roll and a ?lm
a‘ casing adapted to contain a ?lm roll and a ?lm - strip both. of which are provided with marginal
strip, both of which are provided with marginal perforations, and a ?lm moving means for main
taining in said ?lm strip a pre-formed ?lm loop,
perforations, and a ?lm moving means for main
taining in said ?lm strip a pre-formed ?lm loop a portion of which is adjacent to said ?lm roll, of
a portion of which is adjacent to said ?lm roll, a guide member movably mounted between said '
of a guide member movabiy mounted between ?lm roll and said portion of the ?lm loop and for
said ?lm roll and said portion of the film loop and preventing said portion of, the ?lm loop from
for preventing said portion of the ?lm loop from being prematurely wound upon said ?lm roll, said
being prematurely wound upon said ?lm roll, said guide member including ?lm engaging protuber
guide member including ?lm engaging margins ances formed in opposite directions from and
on opposite faces thereof and for engaging only along the opposite edges of said body portion and 15
the perforated margins of the ?lm on said ?lm for engaging only the perforated margins of the
?lm roll and ?lm strip.
roll and in said portion of the ?lm loop.
8. A ?lm guiding member adapted to be posi
6. In a ?lm magazine, the combination with a
casing adapted to contain a ?lm roll and a ?lm tioned between a pair of ?lm strips having mar
gins and a central portion, comprising a body
strip, and a ?lm moving means for maintaining portion, a ?lm engaging ?ange elf-set from one v20
in said ?lm strip a pre-formed ?lm loop with a side and extending along one edge of said body
portion of said ?lm strip adjacent to said ?lm portion to form therewith a guide for the margins
roll, of a guide member movably mounted be
only of one ?lm, and a second ?lm engaging ‘
tween said ?lm roll and said portion of the ?lm ?ange oil-set in the opposite direction from the
strip and for preventing said portion of the ?lm other side and ‘extending along the other edge of
strip in the ?lm loop'from being wound prema
said body portion to form with the said other
turely upon said ?lm roll, said guide member in
side thereof a guide for the margins only of the
cluding a body portion and a ?lm engaging mar
other ?lm strip.
‘
gin along each edge of and o?set in opposite di
30
.
LAWRENCE R. MARTIN.
site directions therefrom for engaging only the
margins of the ?lm roll and the ?lm strip.
G1
10
20
30
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