US1270292A - Platen and pressure feed means. - Google Patents

Description

E. B. HESS. v 'PLATEN AND PRESSURE FEED MEANS.

APPLICATION numnvyonn'.

Patenfed J 11116 l v 5 nue nfoz .l'dwrdl? Hess 2 SHEETS-SHEET l..

platen. In addition, should it be desired to print ona card of relatively heavy stock, it

is often advantageous to guidethe stock. .above the printing line Without necessarily confining it closely to the curve I of the platen.- In such cases the partialelevation of the overhead pressure roll permits this to be done. Again should it be desired to re-' lease the lower pressure rolls, without releasing the overhead pressure roll, means are provided for disconnecting the rock lever from the arms of the overhead pressure roll so'that the lower pressure 'rolls only are released. Finally, when it is desired to release both overhead and lower. pressure rolls this may be done. bycarrying the rock lever through its fulL'movement.

In the specific-form of the invention herein disclosed, one of the arms ofthe overhead pressure roll' is provided with a cam surface having an active portion andan idlepor tion,.the latter preferably being defined by an arc-drawn from the center of the rocking movement of the rock-lever. p

In the accompanying drawings the-invention is disclosed in a concrete and preferred .iorm, and in these drawings:

Figure "1 is a side elevation of the platen.

Y and pressure rolls, together withassociated elements, the platen shaft being in section,

land showi the parts in the position vvhich they norma ly occupy.

I Fig. 2 is, aview similar to Fig. 1,showing the overhead pressure'roll raised into a susside theend frame of the carriage with the near arm .of the overhead pressure roll .and with the. controlling means removed, the parts being in the same position as in Fig. 1. F g. 5 isa sectional detail view on the line 5-5 of Fig. 2.

' Fig. 6 is a fragmentary view of a portion of the parts shown in Fig. 5 butiwith the pin on the rock lever withdrawn to prevent movement of the'ov'erhead pressure roll.

7 indicates the platen of any suitable construction and mounted in the customary manner, in the end. framesB of the carriage. -9 is the .paper table extending upwardly from the ,rearof the platen, and mounted to tilt by means of arms lOsw-ung from the center 11 remote from the platen. The over- ,head vpressure-roll -12 engages the platen at a point-above the line of print and is here shownns bein'g carried by two armsrl3 and 14 which have their pivotal support 15 inrear of the paper table. Normally the overhead-pressure roll rests'against the platen,

Fig. 1 showing as sliown'in Fig. 1, in front of the paper table, but it may be swung manually up to manner well understood in the art. The spring. 16 connects the arm 13 with theend the parts that it will urge the roll into either its active or idle position, once the arms pass the pivotal center, 15. A projection '17 by its engagement with the stop :18

an idle' position abovethe paper table in a frame 80f the carriage and is so related to limits the'movement of the rollin-a rear- 1 ward direction.

The lower pressure "feed means in the present instance take the following. form:

19 indicates the lower from; pressure roll and 20 the lower rearpressureroll, both 1 below the printing lineof the platen. The

roll 19' is carried by the pivotal lever 21 and isnormally urged into. contact with the platen byineans of the spring 22. The-roll '20 is carried by the pendent pivotedlever .23 and is normally urged against the platen by-the spring 24., Suitable means are provided for releasing said lower. pressure rolls,

in this instance taking theforin of a re 2 leasing cam bar 25 rotatably mounted in the carriage. This cam bar is provided with two cam surfaces, here shown as transverse notches 26 and 27 into winch extend the ends of the level-s21 and 2.3-' so that when this cam bar is turned said levers are actuated. and the rolls 19 and 20 are released from contact with the platen. The end of the cam bar 25 is provided with a gear sector 28 which engages with the gear sector 29 on the stud 30. 31- is a rock lever also means of the lower rolls.

- mounted on the stud and secured to the gear sector 29 .byjineans of the pins 32 or otherwise. The rock lever 31 therefore con stitutes'an actuating means for the releasing In order to control the overhead pressure roll from the rock lever-.31, there is provided a pin 33 whichengages with the cam 34 con-- veniently carried by the arm 13 of the overhead pressure roll. This cam has two 'p,or tions, one 35am active portion, and the other 36-2111 idle portion. The ortion 36'is curved to correspond to an arc .drawn from the rocking center .or stud 30. Theresalt is that when the rock lever '31 is moved 'to the left.

inFig. 1, the-pin 33will engage the active portion 35 andwill lift'the overhead pressure roll to the position indicated in Fig.2.

Any further movement of the rock lever 31 to the left will have no effect upon thebver head pressure roll but-will merely sustain it in the position. which it already occupies.

In order to revent the release of the lower 2 that the pin 33 engages the active portion pressure rols 19 and 20 during the period 35 of thecam 34, the parts are so arranged that there is a-lost motion during the, initiai movement of the rock lever 31, This may .be effected in variousways'. For instance,

, 33 has passed to the idle portion 36 of the distanc-e'before it becomes effective against the ends. of the levers'21 and 23, or, as herein shown, the sectors 28 and 29 are mutilated and are Son-elated that the teeth thereof do not act to turn the cam bar until the pin ca 31. The pin 33 is slidingly' mounted in the rock lever 31. For this purpose a bushing '37 is carried-by the rock lever 31 and Said'bushing is provided with a con-' tracted portion 38. The pin 33 passes through, the'lever '31 and bushing 37 and has an enlarged portion 39 at its inner end,

saldenlarged portion 39 forming a stop against the contracted portion 38 when the 5 pin is drawn-outwardly.

The pin 33 also 1 has a head 10 which forms a stop against the rock lever 31 when the pinis pushed inwardly.-- When the,pin is pushed inwardly, it extends underneath the arm 1301" the overhead pressure roll, as shownin Fig. 5, and when it is moved outwardly, it lies at a point outside the plane of thearm 13 as shown in Fig. 6. In the latter instance, a movement of the rock lever 31 will have no effect upon the overhead pressure roll.

\Vhen it is desired to make an erasure upon the paper-in the machine, the lever 31 is moved to the left in Fig. luntil the overhead pressure roll assumes the position shown'inFig. 2. It will be noted that said roll'is now out of contact with the platen, but is still; in a paper guiding position. 'When in this position,.the manifold sheets 41-7-42 will be revented from collapsing over the front of the machine. It is. now possible to introduce a backing 13, as shown,

behind the overhead pressure roll, between the/sheets 11 and'42 and to bring the same "down behind 41 until the printing point is reached. 'Any erasure now made will not show on the subsequent sheets. The same operation may be' followed if it print a private mark on the first sheet which it is not desired to have appear on the sub sequentsheets. It will further be noted that the lower rolls are not released but hold the sheets firmly and against displacement out of the line of print. So also when heavy stock is being passed through the machine and it is desired not to bend it unduly against the platen, the overhead pressure roll may be moved into the position shown in Fig. 2. Should it be desired t remove the overhead pressure roll entirely from the field of oper-- ation, it may be lifted manually into an idle position above the'lpaper table. If, for any reason, the pressure rolls. it isonly necessary to throw the lever 31 to the left in Fig. 1 to i its full extent, when the; overhead pressure roll will be. released first and sequentially thereafter the lower pressure .rolls will be is desired to it should be desired to release all of released. Again, if it is desired to release only the lower pressure rolls, the pin 33 is withdrawn outwardly from V the position shown in Fig. 5 to the position shown in Fig. (i, when the movement of the lever 31 will not affect the position of the loverhead pressure roll, but will only release the lower pressure rolls.

The cam bar 25 acts not only as a releasing means, but also as a means for locking the lower pressure feed rolls intheir released position. For, it will be readily understood that, when'the lever 31is moved to its extreme position to the left as in Fig. 3, the

free'ends of the levers 21 and 23 are resting upon the high portion of the cam-bar 25 which, in consequence, prevents the return of the lower pressure feed rolls into engagement with the platen.

I claim:

1. In a front strike typewriting machine: a platen, an overhead pressure roll above the line of print normally in engagement with the platen, releasing means for elevating the overhead pressure roll into a sustained paper guiding position, lower pressure feed means located below the line of print and normally in engagement with the platen, releasing means for said lower pressure feed means, and an actuating member for sequentially releasing both of said releasing means in the order in which they are named to 'admit, at will, of the release of the upper roll independently of the lower roll. Y

2. In a front-strike typewriting machine,

for said lower pressure feed means, an over head pressure roll above the lineof 'print also normally in engagement with the platen,

releasing means for said overhead pressure roll, an actuating member operating both releasing means, and means pern'ntting the actuating member to operate the releasing 3 eans of the overhead pressure'h'oll independently of the releasing means for the lower pressure feed means. r i 3, In a front-striketypewritmg machine,

a platen, lower pressure feed means located below the line of print and normally in engagement with'the platen, releasing means for said lower pressure feed means, an overhead pressure roll above the line of print also normally in engagement with the platen, 1

releasing means for said overhead pressure roll, an actuating mcm'ber operating both releasing means, and means permitting the actuating member to independently operate the releasing means of the lower pressure feed means or the releasing means of the overhead pressure roll at will.

. 4. In a front strike typewrltingmiachine:

a platen, an overhead pressure roll above the line of print normally in engagement with 3 -ing';both ofsaidreleasing means in the order the platen, releasing means for elevatingthe overhead. pressure roll into a sustained paperuldlngposltlon, lower pressure feed means ocated below the line of print and normally in engagement withthe platen, releasing meansvforzsa d lower pressure feed means, an actuating member-for sequentially releasini'vhich'they are named to admit, at will,

of the release of the upper roll independently-ofthe lower roll, and means for operating said second releasing means from the actuating meansforthe first releasing means and before the latter is actuated to admit, at will. ofindependent actuation of said second-releasing means, I I

5. In a front-strike typewriting'machine, a platen, an overhead pressure roll above the line of print normallyiin engagement with the platen, releasing meansforsaid over-v means fordisconnecting said actuating member from the releasing meansof the overhead pressure roll to perm t independent release of the lower pressure means.

6. In afront-strike typewriting machine,

a platen,-a paper table extending upwardly from the .rear of the platen, lower. pressure feed means below theline of print of the platen,- an overhead pressure roll above'the line of print, releasing means for the lower means; means forelevating the overheadv pressure roll, partially into a sustained pos1-' tion above the platen in front. ofthe paper ,table, said means permitting further lifting manually of the overhead pressure roll into a still higher and idle position above the paper table, an actuatingmember operatmg I both the releasing means of the lower pressuremeans and the elevating means for the overhead pressure roll, and means permitting the actuating member to operate the elevating means of the overhead roll independently of the releasing means, of the lower means.

7. -In a front-strike typewriting machine,

a platen, a, paper table extending upwardly from the rear ofthe platen, lower, pressure vfeed means below the line, of print of the platen, an overhead pressure roll above the line of print, releasing means for the lower means, means for elevating the overhead pressure roll partially into a sustained posis tion above the platen in front of the. paper table, said means permitting further lifting manually ofv the overhead'pressure roll'mto 'a still higher and idle position-above the paper table, an actuating member operating both the releasing means of the lower means pressure roll, and means permitting the actuatlng member to lndependently operate the releasing means of the lower means or the. elevating means 'of the overhead pressure rollat will.

8. 'ln afront-strike typewriting machine, a platen, an. overhead pressure'roll in contact with the platen above the line of, print, pivot'ally. supported arms, Whose pivotal centerv is remote from the center of rotation of the platen, carrying said overhead pressure roll, V

a cam associatedwith said arms, arock lever,- and means between the rock lever and cam for lifting 'saidarm's by the movement of.

the rock lever.

9. In a front-strike typewriting machine,

a platen, an overhead pressure'ro'll in contact withthe'platen above the line of print,

pivotally supported arms, whose pivotal center is'remote from the center of rotation of the platen, carrying said overhead pressure 2 roll, a cam associated with said 'arms, a

rock lever, means between the rock lever and cam for lifting said arms by the movemeat of the rock lever, lower pressure feed means below the printing point of the plat-en, and releasing means for'said lower means operated by'the rock lever.

I 10. In a front-strike typewrit ingmachine, a platen, an overhead pressure roll-in con tact withthe platen above the line of print,

' pivotally supported. arms carrying said overl1ead.-presslne roll, a, rock lever, a' cam associated \vith'saidarmshaving an a'ctive ort ion' and an idle portiondefined by an arc and cam for lifting said arms by the initial movementof the rocklever and for sustain-, mg said arms in an elevated position durm'g' the subsequent movement of the rock lever.

. -l1.' In a.fronbstriketypewriting machine,

a platen, an;overhead pressure roll in contact-with the platen above-the line ofprint, pivotally supported carrying said overhead pressure roll, a rock lever, a cam associated. with said arms havin an active "portion and an idle portion de ned by an are described from the center of rocking .115'

of the rock lever, means between the rock lever and cam for lifting said arms by the initial movement ofthe rock lever and'for sustaining said arms in an elevated position during the subsequent movement of therock" lever,lower pressure. feed means below the printing point of. the platen, and releasing means for said lower'aneansunafiected during -the initial movement ofthe rockjlever and while the overhead 'roll is being elevated and actuated by the rock lever durl'n -its pressure roll remains elevated. j

12. Ina front-strike typewriting machme,

' a platen, an overhead pressure rollfin 'c onsubsequent movement while the over ead' I 100 escribe d from the center of rocking of the rock lever, and means between the 'rock'lever' pivot-ally supported arms, whose pivotal cen.

'r ter isremote from the center of rotation of the'platen, carrying said overhead pressure roll,'a rock lever, and cam means between said rock lever and arms for lifting the arms by the movement of the lever.

} ter is remote from the center of rotation tween the said rock lever and the arms 13. Ina front-strike typewriting machine,

a platen, an overhead pressure roll in contact with the platen above the line of print, pivotally supported arms, whose pivotal center. isremote from the center of rotation of the platen, carrying said overhead pressure roll, a rock lever, cam means between said rock lever and arms for lifting the arms by the movement of thelever, lower pressure feed means below the printing point of the platen, and releasing means for said lower' means operated'by the rock lever.

14. In a front-strike typewriting machine, a'platn, an overhead pressure roll in contact with the platen above the line of print, pivot-ally supported arms, whose pivotal cenof the platen, carrying saidoverhead pressure roll, a rock lever, and cam means hej whereby the initial movement of, the rock lever lifts the arms, and the subsequent movement of therock. lever sustains said arms in an elevated position.

l5.- In a front-strike typewriting machine,

a" platen an'overhead pressure roll in contact with the platen above the-line of print,

pivotally supported arms. .whose pivotalvcenter is remote from the center of. rotation of therplaten, carrying said overhead pressure roll, a rock lever, cam means between the said rock lever and the armswhereby the initial movement of the rock lever lifts the arms, and the subsequent, movement of the rock lever sustains said arms in an elevated position, lower pressure'feed means betowthe' printing point of the platen, and releaslng means for said lower means un affected during the initial movement of therock lever. and while'the overhead roll is beingelevated and actuated by the rock lever duringits subsequent movement while the overhead pressure roll remains elevated,

16. In a front-strike typewriting machine, a platen, an overhead pressure roll in contact with'the'platen above the line of print,

pivotally supported arms carrying said overhead pressure 'roll, a rock lever, cam means between the said'rock lever and the arms whereby the initial movement of the rock lever lifts the arms, and the subsequent movement of the rock lever sustains said arms in an elevated position, lower pressure feed means below the printing point of the platen, releasing means for said lower means unaffected during the initial movement of the rock lever' and while the overhead roll is being elevated and actuated by the rock lever during its subsequent movement while the overhead pressure roll remains elevated, and means for permitting'the rock lever to operate then-(leasing means for the lower means without lifting the arms.

17. In a front-strike typewriting machine, a platen, an overhead pressure roll in contact with the platen above the line of print, pivotally supported arms carrying said overhead'pressure roll, a' rock lover, a cam associated with said arins having an active associated with said arms, a pin extending from said rock lever in under said cam for lifting the arms by the movement of said rock lever, lower pressure feed means below the printing point of the platen, releasing means for said lower means operated by the rock lever, and means for withdrawing the pin from engagement with the cum to permit the rock lever to operate'the releasing means of the lower means independently of the movement of the overhead pressure roll. i

19. In a front-strike typewriting machine, a platen, an overhead pressure roll in contact with the platen above the line of print,

, said overhead pressure roll, 'arock lever, :1 am associated with said arms having an active portion and an idle portion defined by an are described from the center of rocking of the rock lever, a pin extending from said rock lever in under said cam for lifting said arms by the initial movement of the rock lever and for sustaining said arms in an elevated position during the subsequent movement of the'rock lever, lower pressure feed means below tlieprinting point of the platen, releasing means for said lower means unafpivotally supported arms carryin,"

fected during the initial movement of the rock le er and while the overhead roll is being elevated and actuated by the rock lever during its subsequent movement while the overhead pressure roll remains elevated, and means for withdrawing the pin from engagement with the cam to permit the rock lever to operate the releasing means of the lower means independently of the movement of the overhead pressure roll.

20. In a front-strike typewriting machine,

a platen, lower pressure feed means below a the line of print of the platen, releasing means for said lower means,actuat1ng means forsaid releasing means, an overhead.

sure roll above the line of print-of the platen, releasing means for said overhead pressure roll, and means for operating said second releasin'gmeans from the actuating-means of the first releasing means and before-the latter-is actuated to admit, at will, of independent actuation of said second releasing v 21. In a front'es trike typewriting machine, a platen, a paper table abjacent to'the rearv of the platen, an overhead pressure roll pivotallysupported at a point in rear of the paper table and normally engaging the platen above the linev of print and infront of thepap'er table,'and means for sustaining-thepressure rollin an elevated paper gulding position adjacent to the, platen but out of contact therewith and in front of the paper table. 1 v

22. Ina front-strike typewriting machine,

a platen, a paper table adjacent to the rear of the platen, an overhead pressure roll piv-.

otally supported at a point 111x631 of the paper table and normally engaging the platen above the line of. print and in :front of the paper table, a spring for normally urging the pressure roll against the'platen,

and means for sustaining thepressure roll,

in opposition to the action of the spring, in

'- an elevated paper guidin'gposition adjacent to thevplaten butiout ofcontact therewith and-in front of the paper table." I

23. A platen, apivotally supported over- -.:head pressure roll ,capable of moving from a paper-guiding position-in contact with the iplatenabove the line of print to an idle position out of contact-With. the" platen,

spring means for holding said pressure roll in either position, and means for sustaining said pressure roll in an intermediate paper' .the platen but out of"contactjtherewith.

iv 24;. A platen,- a paper table adjacent to the rearof the platen, a pivotally supported overhead pressure roll capable. of. moving guiding position adjacent to froina paper guidingposition in contact:

' with the platen' above the line of print to an idle position above the'papertablaspring means for'holding saidroll in either position, and means for sustaining said pressure roll in an intermediate paper guiding posi-' tion adjacent to the platen but out of contable.

tact therewith and in'front f thepaper.

25. A platen, a paper table adjacent to the .rear of the platen, an overhead pressure :roll

pivotally-supported at a point in rear of the paper; table .andcapable of moving fromv a I 1 paper guiding position incontact with the 60 platen above the line of to an idlelposi- 'tionabove-the paper table, and means ,for' sustaining said pressure-roll in an intermediate paper guiding position adjacent to the platen but. out of contact therewith andinflfi front of the paper table. T i y 26. A platen, a paper table adjacent-to the rear of ,thep1aten,an overhead pressure toll pivotally supported at a point rear of the paper tableand capable ofmovingfrom a 70 paper guiding position'in contactwith'the g 1 platen above the line of print. to an idle position above the paper table, spring means for;

holding said roll inv either position, and

. means for sustaining said'pre'ssure roll in an 7 'intermediatepaper guiding position .adjacent to the platen but'out of contact there with and in front of the paper table. V

.27. Ina front strike typewriting machinei f j a platen, an overhead pressure roll above the. line of print and normally in engagement with the platen, releasing means for said overhead pressure roll, lower pressure. feed rolls located below thetlineofprint and normally in engagement withthe. platen, re- 7 leasing and locking means Iior said lower pressure feed means, and an actuatmg memher for operating both releasing means .inthe order in which-they are named to admit, 1 4 at wi11, of1independent operatiomof the first namedreleasing means.

' 28.- In a front-strike typewriting machine," a platen, an overhead pressure roll above the line of print normally in engagement with the platen,- releasing means for said over head pressure roll, lower pressure feed,

-means locat'edbelow the line of print also

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