US1784487A

US1784487A - Ejector for cutting cylinders

Info

Publication number: US1784487A
Authority: US
Inventors: Joseph P Feeney
Original assignee: Congoleum Nairn Inc
Current assignee: Congoleum Industries Inc
Priority date: 1930-05-29
Filing date: 1930-05-29
Publication date: 1930-12-09
Anticipated expiration: 1947-12-09

Description

Dec. 9; 1930. I J FEEIQEY 1,784,487

' EJECTOR FOR CUTTING CYLINDERS Filed May 29, 1950 INVENTOR Jase m A? Fee/16y ATTORNEY Patented Dec. 9, 1930 UNITED-STATES *TP' TEN ()FFI'CE .TosEPH r. FEENEY, F KEARNY, nnw JEEsEY, ASSIGNOR ro coneornnivnnnran; Inc, Aconron'n'rronor nnwvonr; r

EJEcroR ro'ncnrrrme cY'LInnEEs Application filed may 29,1930. Seria1Noid57A55.

inlaying cylinders of the type used in automatic machineryv for the manufacture ofinlaid linoleum and more particularly to ejectors employed in such cutting cylinders;

; The primary object of the invention is the provision of a novel ejector of the typereferred to which is substantially'more rigid in construction, safer in 0peration,and.hav'- ing a greatly increased life as compared with the conventional form of ejector now inuse.

Referring to'the drawings Y Figure 1 is a partial section through a cutting cylinder in which the ejectors embody ing the present invention are mounted.

Figure2 is a top view of the improved ejector. j i V Figure 3 is a section on the line 3-3 of Figure 2, showing in detail the construction of the improved ejector. A cutting cylinder consists of a shell 10 (Fig. 1) which is pierced by numerous perforations 11 into whichthe-ejector blocks 12 fit and through which the ejector spindles 13 pass to the interior of the cylinder. WVithin the cylinder is arranged a pattern forming roll 14, the surface of which is provided with a series of recesses 15, conforming to the pattern and into which the ejector spindles 13 enter to permit the pattern tesserae to be retained by the cutting cylinder, whereas the spindles appearing upon the surface of the roll 14 are forced outward by the latter and throw out the material between the tesserae which it is desired to retain for the given pattern. In these particulars the apparatus is of well known construction.

In the ejectors heretofore known each spindle 13 (Fig. 1) carries a head or plate 16 which conforms generally to the shape of the tesserae cut by the knives 17 Theplate is united with the spindle by means of a machine screw passing through a counter-sunk opening in the plate and threaded into a tapped hole in the spindle. This construction possesses several majordefects which make the ejector hazardous in use and which short-- ens its life. Among these most serious are (a) i the short, if any, bearing length between the stem of the spindle and plate whereby any shown,

eccentric load on the plate istransmitted directly to and earned by the securing screw,

(b) the unavoidably small diameter and con-- sequent weakness of the securing screw which causes thescrew to fail frequently when in use, and (c) theabsence of a positive inter lock between spindle and plate to prevent loosening of the plate-with resulting serious damageto the'knives of the cutting cylinder.

The present invention provides an ejector which eliminates all of the above recited disadvantages as will be fully apparent from the following description in connection with I the accompanying drawings;

, .The improved ejector (see Fig. 73) com prises acentrally bored block 20,usually .of brass, which may be forced into one of the perforations 11 of the-cylinder shell 10 in the usual manner. An internal shoulder 21 ,o I

is formed within the bore of the block in any suitable manner as, for instance, by means of a bushing'22 threaded into the tapped outer end of theblock. The bushing 22 is provided with ,a central opening 23 through which the spindle 18 passes. The spindle 13 is provided witha collar24 working within the inner end of the opening in the block 20.

Between the bushing 22 and the collar 24 is I confineda light coil spring25 which serves to retract the spindle after it has been pushed out by the pattern roll to extrude the mate rial retained between the cutting knives. To,

guide the spindle inits reciprocating movement and to prevent its rotation, projecting lugs 26 are provided on the collar 24: and designed to slide in longitudinally extending guide slots 27. V

The spindle 13 is threaded at its outer end 28 and is provided with a shoulder as indifcated at 29. "The ejector-plate 16 is perforated and engages the stem of the spindle 13, abutting the shoulder 29. To provide-increased bearing surface between the spindle and the plate, a boss 32 is formedon the plate adjacent the shoulder of the spindle, as

The plate 16 is also counter-bored to rek The bushing. '22 may becomplementally counter-sunk to receive such boss.

tween the plate 16 and the" nut 33 is a cup washer 34 adapted to be swaged into the slots 35 in the nut 33 and the slots 36 in the plate 16, after the nut has been tightened on the spindle.

It will be observed that in the described construction, the plate 16 is securely retained between two flat surfaces of considerable area, namely the shoulder 29 and the" nut 33. This provides an extremely rigid union between the spindle and plate which positively prevents rocking of the plate when the latter is subjected to eccentric loads. Likewise the considerable bearing length between the plate and the stem of 'the spindle prevents any appreciable rocking of the plate even in the event that the locking nut should become slightly loosened. It also reinforces the spindle and reduces to a mini mum the liability of fracture'of the spindle at the point of its juncture with the plate. Furthermore,- the construct'ion provides a positive interlockof the spindle and plate thereby preventing relative movement between them. V

a spindle slidable in'said block said spindle having a shouldered 'p'ortionfand an externally threaded stem portion adjacent its having a shouldered portion and an extennally threaded stem portion adjacent its outer end; a perforated plate engaging the shouldered outer end of the spindle and abutting the shoulder thereof, said plate having. a boss portion adjacent the shoul-.

dered portion of the spindle and"being counter-bored to provide a nut-ireceivi1'1gre.- cess'; aninternally threaded nut inte'rfittii 'g said nut-receiving recess and engaging said pla-te-and the threa'dedstem of said spindle whereby said plate is securely cl'ainped'i between' said nut'andtheshoulder of 'said spindle; and a cup washer adapted to positively interlock 'said plate" "and said nut against relative movement; 1

Int'estimony whereof, I affix my signature." a a c P. 'FEENEY.

outer end; a perforated plate engaging the shouldered outer .end of the spindle and provided with a" nut-receiving recess; and an internally threaded nut interfitting' said nut-receiving recess and engaging the threade'd stem of said spindle.

2. An ejector for linoleum cutting and inlaying mechanism comprising a block adapted to be secured in afcuttin'g cylinder shell; a spindle slidable in said block, said spindle having a shouldered portion and an externally threaded stem portion adjacent its outer end; a perforated plate engaging the shouldered outer end ofthe spindle and provided with a nut-receiving recess; an internally threaded nut interfitting said nut-receiving recess and engaging the threaded stem of said spindle; and means for preventing relative movement of said plate and said nut.

3. An ejector for linoleum cutting and .inlaying mechanism comprising a block adapted to be secured in a cutting cylinder shell;

having a shouldered portion and an extera spindle slidable in said block, said spindle outer end; a perforated plate engaging the shouldered outer end of the spindle and abutting the shoulder, said plate being counter-bored to provide a nut-receiving 1 recess; aninternally threaded nut interfitsaid plate and the threaded stem of said tingsaid nut-receiving recess and engaging I llU