US2939210A - Paper sampler - Google Patents

Description

J. J. CANNAN June 7, 1960 PAPER SAMPLER 2 Sheets-Sheet 1 Filed Sept. 14, 1954 INVENTOR Jazz tlcanfldn United States Patent PAPER SAMPLER John J. Cannan, 108 North Drive, Rochester, N.Y.

Filed Sept. 14, 1954, Ser. No. 455,870

6 Claims. (Cl. 30-124) This invention relates to testing and more particularly to an improved apparatus and procedure for removing a sample from a travelling web for testing purposes.

It is important in paper making to be able to obtain samples during the process of manufacture so that the problems relating to drying, surface formation, strength, weight, etc., may be carefully studied and analyzed. With the known methods of obtaining samples from a travelling web there are many restrictions based on convenience, danger of severing the web and other related problems.

Accordingly, it is an object of the present invention to provide a sampling apparatus for taking samples from a travelling web which is simple in operation and may be conveniently used in places heretofore inaccessible by the known manual methods.

Another object of the present invention is the provision of a device for taking samples from a travelling web between the longitudinal edges thereof so as to minimize the tendency of completely breaking the web as the sample is removed.

A further object of the invention is the provision of a novel procedure for taking samples from a travelling web whereby it is possible to analyze the drying effectiveness of the dryers, and other related problems in the production of paper and the like.

The present invention contemplates the provision of a cutting blade which is positioned adjacent the travelling web and includes means for rapidly moving the cutting blade about a fixed axis so as to take a sample from the travelling web between the longitudinal edges thereof. With the present invention it is possible to take the samples any place across the width of the web such as the front, side, back and so forth. Moreover, samples may be taken at any location along a paper machine even in rather inaccessible points such as between dryers. Furthermore, it has been found that the speed of travel of the web and the moisture content thereof do not adversely affect the operation. Consequently, by following the procedure of the present invention it is possible to obtain samples which will permit the accurate calibration of moisture controls, automatic weight gauges and the like, used in the manufacturing process and also for analyzation of surface formation, ash content, wet and dry thickness, bursting strength, basic weight and so forth.

These and other objects of the present invention will become more apparent during the course of the following detailed description and appended claims.

The invention may be best understood with reference to the accompanying drawings wherein illustrative embodiments are shown.

In the drawings:

Figure 1 is a perspective view showing one embodiment of a device constructed in accordance with the principles of the present invention indicating the preferred manner of use;

' Figure 2 is an end view of the device as shown in Figure 1;

l 2,939,210, 1C6 Patented June 7, 1960 Figure 3 is a side elevational view thereof;

Figure 4 is a top plan view of a modified form of the device.

Figure 5 is a partial perspective view showing certain details of construction of the device illustrated in Figure 4.

Referring now more particularly to the drawings, there is shown in Figures 1-3 one embodiment of a sampling device 10 for carrying out the objects of the present invention. The sampler 10 comprises a portable, generally T-shaped frame 12 which may include a longitudinally extending frame member 14 having a transversely extending frame member 16 fixedly mounted intermediate its ends to one end of the member 14. Figures 1 and 3, a generally U-shaped mounting member 18 is mounted centrally of the frame member 16 and suitable fastening elements, such as screws 20,extend through the bight portion of the mounting member into the frame members. The screws 20 therefore may also serve as the means to secure the two frame members 14 and 16 together.

The mounting member 18 preferably includes a pair of upwardly extending legs 22 having aligned apertures 24 provided therein for receiving a longitudinally extending shaft 26. Mounted for pivotal movement about shaft 26 is a generally U shaped cutting blade 28 comprising an elongated, relatively thin sheet of metalcurved longitudinally so as to form a pair of spaced, interconnected legs 30. The free ends of the legs 30 are preferably provided with aligned apertures 32 which receive the shaft 26. The leading edge of the blade 28 may be sharpened and is preferably serrated, as shown at 34. Suitable means is preferably provided for pivoting the blade about shaft 26 whereby the cutting edge of the blade will be rapidly passed through the travelling web during operation. As shown, this means may take the form of a coil spring 36 surrounding the shaft 26 and having one of its ends engaged in a suitable aperture in the cutting blade and its other end engaged with the frame member 16. r

In order to move the cutting blade into a cooked position wherein the spring will be operable to move the blade into cutting relation to the web, a lever or handle 38 is rigidly connected with the shaft 26. As shown in Figure l, the lever 38 may take the form of a rod having one end thereof bent upon itself so as to extend transversely from the remaining portion, the remaining portion constituting a second shaft 40. The forward end of the shaft 40- may be rigidly connected with the rearward end of the shaft 26 by any suitable means, such as coupler 42 and an additional mounting bracket 44 may be secured to the frame for supporting the rearward end thereof. In this regard, it is well to note that the mounting brackets 18 and 44 support the shafts 26 and 40 for both rotary and axial movement with respect to the frame as will become more apparent hereinafter.

The forward end of the shaft 26 is preferably bent transversely as at 46 and a second transverse bend is formed, as at 48, so as to provide a rearwardly extending projection 50 which is adapted to engage a registering In order to hold the lever 38 in its blade cocking posi tion, such as illustrated in Figure 2, a trigger member As shown in .bycorresponding primed numerals.

'will'amove together.

the longitudinal frame member 14 by any suitable means, such as transversely extending bolt and nut assembly 58.

The trigger 56 may include a lower end 60 which may be conveniently grasped by the hand er the operator and an'upper end 62 bent'i n the forrri'of a hook which is engageable over the lever 38. It will be seen that when the. lever 38 has been pivoted into a blade cocking position, thetrigger 56 may be pivoted until the hooked upper end 62 is engaged thereover and in this manner the blade is held inthe cocked position against the action of the. spring 36. i

As. shown inFigure 1, the blade 23 is'operable to travel through an arc of approximately 180, and inits cocked position the lugs'54 will engage the transverse frame member 16 so as to provide a stop in this direction. In order to'provide. a stop for the blade in its cutting movement under tliev influence of the spring 36, a spacer member'64 "may be provided on the opposite side of the transverse frame member 16. A generally U-shapedmember66 having an internal shape conforming generally to'the outline shape of the blade 28 may be suitably secured to the upper surface of the spacer member 641 for a purpose hereinafter to be described.

In Figure 4 there is shown a modified form of the sampler device 10 wherein corresponding parts are designated i In this embodiment shaft 68 is journaled within the aperture 24 in the legs 22" of the mounting member 18 and the free ends of the legs 30' of the blade 28' are rigidly secured to the shaft 68, as by welding or the like, so that the shaft and blade The rear end of the shaft 68 has one end of a hollow cylindrical member 70 fixedly mounted thereon as by set screws 72 and the other end of the member 70 is provided with. a key hole slot'74. The hollow interior of the member between its'ends is enlarged as at 76 so as to receive a key element 78 formed on the forward end of a shaft 80. The shaft 80 is mounted on the longitudinal frame member 14 for both axial and rotary movement by'any' suitable means, such as spaced ,L-shaped brackets 82. It will be seen that the key element 78 may be engaged in the key hole slot 74 which together constitute interengageable means; whereby the blade '28 may be moved into a cocked position and released into cutting engagement with the travelling :web.

'An outwardly extending lever or handle 84 may be rigidly fluence of the spring 36'.

lower end is pivotally mounted on the frame member 14', as by bolt and nut assembly 58' so as to engage the handle 84 and move the same longitudinally.

To take a sample from a travelling web in accordance with the present invention, the sampler device is first positioned in close proximity to the web, preferably be low the surface thereof. In this regard, the U-shaped member 66 shown in Figures 1-3 may be utilized as a guide for engaging the web. Assuming that the blade is in its cockedposition as shown in Figure l, the trigger 56 is moved by the operator so that the forward hooked end 62 operates to move the shafts 26 and 4t axially forward ,so as to disengage the projection 50; from the aperture 52. When the projection is released from the aperture the blade will be rapidly pivoted about its axis by means of the'spring 36 and the cutting edge 34 will first move upwardly through the web into cutting engagement therewith and then downwardly through the web a sample piece of the web is taken therefrom.

there is considerable advantage in cutting the sample from between the longitudinal edges of the web, since, in this manner, the danger of completely severing the web is greatly minimized. It has also been found to be preferable to position the device with the pivotal axis of the blade extending transversely of the web so that the blade will move longitudinally thereof. Best results may be obtained when the cutting blade travels in the same direction as the traveLof'the. web. v

The blade of the present invention may be moved into a cocked'position by movement of thetrigger so as to release the upper hooked, end from engagement with the lever 38 and then by rotating the lever so that the projection 50 is aligned with the aperture 52. The lever is then pulled rearwardly so as to engage the projection in the aperture and then the lever may be pivotedinto the position shown in Figure 1 and, the upperhooked end 62 of the trigger engaged therewith so as to hold it in the cocked position.

With the embodiment shown in Figure 4, the same procedure applies as tothat described above and it will be noted that the key element 78 will engage the key holding slot 74 to enable the lever to move the blade intoits cocked position and to maintain it therein. Upon axial movement of the shaft 80, by means of the trigger 56', the key element 78 will be moved out of engagementwith the key hole slot- 74 and into the enlarged portion 76 so that the blade will be free to move under the in- It is to be noted that the transverse frame member 16 may take the form of an angle bracket extending from one side of the longitudinal frame member'14' so as'to' provide a stop for the blade in its cocked position, The opposite side of the frame member 14' itself may provide a stop in the opposite direction so that the blade is free to move through an are greater than in' the order of 225. When this construction is utilized, the U-shaped member 66 is appropriately omitted.

It is to be understood, however, that the forms of the claims.

I claim: a

1. A device for taking samples from a traveling web comprising a frame, a generally U-shaped cutting blade having a sharpened cutting edge, means pivotally mounting the spaced ends ofvsaid cutting blade to said frame, spring meansbiasing said cuttingbladeto pivot it to a first position withrespectto said frame, means for holding said blade in a second position with respect to said frame, handle means extending outwardly from said frame and means operably' mounted on said handle means for releasing said holding means, whereby said blade will be pivoted from second position to said first position upon release of said holding means to cut a sample from a traveling web in the path of travel of said blade from said second position to said first position, the cutting edge of said blade extending in the direction of movement of said blade from said second position to said first position.

2. A device for taking samples as set forth in claim 1 including means operable from a position remote from said blade for moving said blade from said first position to said second position and means for actuating said holding means to hold said blade.

3. A device for taking samples as set forth in claim 1 in which said frame has a U-shaped recess at said first position, positioned to receive said U-shapedcutting blade, the Walls of said recess being slidably engageable with said U-shaped blade to provide a scissors-like action between said U-shaped'cutting blade and the walls of said recess as said cutting blade moves to said first" position.

4. A device for taking samples as set forth in claim 1 in which the cutting blade has a saw tooth cutting edge.

References Cited in the file of this patent UNITED STATES PATENTS 5. A device for taking samples from a traveling web comprising a frame, a first shaft rotatably carried by 289,116 McDonald Nov. 27, 1883 said frame, a generally U-shaped cutting blade having 5 3 ,778 OtOs Feb. 3, 1885 spaced ends connected with said first shaft for move- 507,792 Denham Oct. 31, 1893 ment therewith, a second shaft coaxial with said first 609,364 Olmsted Aug. 16, 1898 shaft mounted for axial movement with respect thereto, 1,097,031 Kubokawa May 19, 1914 a key on the end of one of said shafts, the adjacent 2,258,843 Brown Oct. 14, 1941 end of the other of said shafts having a keyhole slot 10 2,359,699 Valentine Oct. 3, 1944 therein for receiving said key, said cutting blade being 2,362,031 Smith Nov. 7, 1944 spring biased to move in one direction, and a lever ex- 2,371,734 Buttress Mar. 20, 1945 tending outwardly from said second shaft for moving 2,374,847 Vollrath May 1, 1945 said cutting blade in the opposite direction against said 2,387,633 Alpert Oct. 23, 1945 spring action. 15 2,408,488 Sorensen Oct. 1, 1946 6. A device as defined in claim 5 including a trigger 2,495,971 Isel-in Ian. 31, 1950 movably mounted on said frame for engaging said lever 2,536,336 Watson Jan. 2, 1951 to thereby hold said cutting blade in a cocked position 2,570,055 Gasdia Oct. 2, 1951 and for moving said lever and second shaft axially with 2,598,042 Dritz May 27, 1952 respect to said first shaft to thereby release said cutting 20 2,602,507 Adams July 8, 1952 blade from said cocked position.

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