US1661619A

US1661619A - Cutting device

Info

Publication number: US1661619A
Application number: US25445A
Authority: US
Inventors: Truman G Paddack
Original assignee: Stearns and Foster Co
Current assignee: Stearns and Foster Co
Priority date: 1925-04-23
Filing date: 1925-04-23
Publication date: 1928-03-06
Anticipated expiration: 1945-03-06

Description

March 6, 1928. 1,661,619

v T. e. PADDACK CUTTING DEVICE v Filed April 23, 1925 Arm/W06.

Patented Mar. 6, 1928.

UNITED STATES 1,661,619 PATENT OFFICE.

TRUMAN G. rnmmcx,

COMPANY, OF LOCKLAND, OHIO, A CORPORA'IION OF OHIO..

or WYOMING, onto, Assrenon to Tim srnlmns & FOSTE CUTTING DEVICE.

Application filed April 23, 1925. SerlalNo. 25,445.

My invention relates to cutting devices in general and particularly to cutting devices as may be used in combination with calendering rolls to cut the web being delivered from the calender rolls into a plurality of rolls of predeterminedwidth or the like.

It is the object of my invention to provide cutting mechanism which shall be easy to adjust and in which reciprocating devices are provided in combination with cutting devices, which reciprocating devices will provide a simple means of adjusting the cutting devices so that they will always operate to cut with a clean out line. 7

.It is further my object to provide for a plurality of circular cutting knives mounted on a driven shaft, reciprocating devices mounted on a shaft with which said knives contact, so that wear on any one of the cutting knives may be allowed for by an adjustment of the reciprocating device operating in conjunction with the WOIIlkHlZlIt-Z without the necessity of adjustment of the other knives mounted on the driven shaft.

It is further my object to provide cutting knives mounted on a driven shaft which may be freed from operation by adjustment of reciprocating sleeves with which the knives contact.

In the art it is old to provide a moving shaft with circular knives mounted on the shaft, and to retain the knives on the shaftwith adjustable means so that they may be arranged at a selected distance apart so that the web passing under the cutting knives will be cut into strips'of desired width. The usual method of providing a cutting surface for circular rotating knives against which they shall abut has been to mount a chilled steel roller adjacent the shaft with the cutting'knives on it, and to pass the web between the shaft with the knives on it, and the chilled steel roller. The particular difficulty with such a construction, which my invention overcomes, is that when one of the knivesbecomes worn, it will not cut the web with a clean out line. It therefore has been necessary to remove all the cutting knives from the shaft and grind them all down to the same diameter'or to remove the worn knife and replace it with'a new one. Such changes comin during periods of operation waste conslderable time which in a continuous process is very uneconomical. Another method has been to provide two sets of cutting knives on two adjacent shafts and to pass the web through the shafts so that the cutting edges of the knives on the one shaft, bear against the cutting edges of the knives on the other shaft. Such a combination doubles the difficulty encountered with adj ustment required by dull knives.

Referring to the drawing illustrating my invention the figure is a side elevation of my preferred structure. In the figure generally indicated at 1 is a shaft supporting the cutting knives 2. The knives are rigidly retained on the cutting shaft by means of collars 3 which are adjustable on the shaft with set screws indicated at 4. In setting the knives on the shaft I have further found it preferable to provide a keyway 5 longitudinally in the shaft and to provide the knives either with extended portions fitsecured with keys against rotary motion on the shaft; The cutting shaft is spring-held at the journals so that the bearing of the knives is sufficiently yielding so that the passage of a hard object through the cutting device will not strip the gearsoperating the cutter. In position opposed to that i of the cutting knives and on the reverse side of the web passing from the calender rolls is a shaft 6 preferably with a keyway 7 disposed longitudinally in the shaft. Sleeves 8 with tapered exterior portions are retained V on the shaft with set screws 9 and collars 10 on the hi h'sides of the tapered portions of the sleeves so that the collars will resist the tendency of the cutting knives to work down on the tapered portionsand thus move 7 the sleeves out'of engagement position. The collars may be mounted on the shaft with set screws 11. A

In adjusting the cutting knives on the shaft by measuring the distances apart with a rule, the knives may be-mounted in any desired position with relation each to the other. In order to provide a bearing surface for the knives the sleeves are moved to 1 such co-operating position that each one of the knives will bearrwith equal force against I its opposing sleeve. When one of the knives becomes dull it is a very simple matter to release the collar'and the sleeve opposed to it and move the sleeve and collar to a correct bearing position.

In order to clearly disclose my preferred structure I have described. the exact structure of mv cutting device, but it will be readily understood that modifications of various mechanical equivalents by which the knives or sleeves may be supported on the shafts will occur to those skilled in the art. It is my wish therefore not to limit my claims to the exact structure shown but to claim broadly the cutting knives abutting tapered sleeves regardless of the method of support of the knives and sleeves on the shafts on which they are mounted.

Haring thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

l. in a cutting device two rotatable shafts disposed in aligned position on opposite sides of a plane in which a web may be continutn slv moved. cutting knives adjustably i|1ountedonoi1e ot' the rotatable shafts and tapered sleeves. with the peripheral faces of which said knives engage, adjnstablv mounted on the other shaft on the opposite side of the web from. the shaft on which the cutting knives are mounted.

2. A cutting device adapted to cut a continuous web into longitudinal strips, said cutting device composed of a shaft and a plurality of cutting members adjustably retained on said shaft, the peripheries of said cutting knives fixedly positioned with relation to the mounting shaft, another shaft and bearing members adapted to form peripherally moving backing for said knives adjustably mounted on said other shaft, the

peripheries of said bearin; members being adjustable with relation to the cutting edges of the cutting knives.

3. In a cutting device, a shaft. having a plurality of circular cutting knives adjustablv mounted thereon, anotherslni'l't, tapered sleeves adjustably mounted on said other shaft, means for permitting adjustment. of said sleeves on said other shaft in cooperating bearing position with the pluralit of cutting knives and meanst'or retaining said sleeves in said adjusted positions.

4. A cutting device composed, of a shaft having mounted thereon a pluralitx ot' cut.- ting knives, having peripheral cutting edges. rontinuousl peripherally movable tapered bearing meiulmrs against which the cutting edges of said knives abut. and means for permitting independent adjustment of said bearing men'ibers with relation each to the other to bear against said cutting knives, to conform to unequal wear of the cutting edges of said knives.

A cutting device composed of two shafts with cutting members with fixed pcripheries on one shalt, said peripheries being subject to variation each with relation to the others, and tapered bearing members mounted on another shaft aligned with the first mentioned shaft and means for permitting adjustment of said bearing; members with relation to the. cutting members having peripheries which are subject to variation.

T HUMAN G. PADDACK.