US2285507A - Gummed paper tape machine - Google Patents

Description

June 9, 1942. H. FQ GlLLlAM 2,235,507

' GUMMED PAPER TAPE MACHINE Filed March 24, 1941 INVENTOR, Ha/y E /Y//a/W.

' ATTORNEY.

Patented June 9, 1942 UNITE STATS 5 Claims.

This invention relates to improvements in tape dispensing machines and particularly to a machine whereby gummed paper tape is measured and moistened.

The principal object of this invention is the provision of a tape dispensing machine having means for feeding the tape, driven by a crank when rotated in one direction and a shearing means operable by said crank when it is rotated in the reverse direction.

Another object of the invention is the provision of a tape dispensing means having means operable by the driving crank to deliver tape sections of pre-determined unit lengths.

A further object of this invention is the provision of means whereby the feed rollers are secured against reverse movement when a given unit length has been fed forward.

Other objects are simplicity and economy of construction, ease and efficiency of operation, and adaptability for use with any of the various types or sizes of tapes.

With these as well as other objects which will appear during the course of the specification, in

view, reference will now be had to the drawing wherein:

Figure 1 is a side elevation of a tape dispensing machine embodying this invention.

Fig. 2 is a plan view of the machine with the tape in position.

Fig. 3 is an enlarged sectional view of the feed end portion, of the machine.

Fig. 4 is a vertical sectional view taken on line IV-IV of Fig. 3 with parts left in elevation.

Fig. 5 is a vertical sectional view taken on line V-V of Fig. 3.

Fig. 6 is an enlarged sectional view taken on line VI-VI of Fig. 1.

Fig. 7 is a sectional view taken on line VII-VII of Fig. 6.

Fig. 8 is an enlarged sectional view taken on line VIII-VIII of Fig. 2.

Throughout the several views like reference characters refer to similar parts and the numeral IQ designates a case open at the top and provided with vertically disposed partitions l2 and It to form a compartment I4 for receiving the roll of tape I6 and a reservoir I8 for receiving water Z. The case is mounted on suitable feet 22, made of soft material such as rubber to prevent scratching of the desk. An out-turned lip 24 with up-turned guide flanges 25 is provided at the iront of the machine to guide the out-going tape. Above the reservoir I8 and adjacent partition i2 are upstanding ears 28 and 32 on opposite side walls 32 and 34 respectively of case I3. Each ear is vertically slotted at 35 to receive the end trunnions 38 of weight roller ed. A capillary feed member such as brush l2 extends upwardly from adjacent the bottom of reservoir I8 to pass through a slot M formed between the in-turned flange 46 of partition I2 and the cross plate 48 to normally contact roller lic. The tape lvpasses between the roller iii and brush 52 as it is being fed from the machine so that its lower gummed side is moistened by water fed by brush 2 from the reservoir.

A frame ES secured by screws 52 to a ledge 54 formed between walls 32 and 3d of the case Iii is provided at its front portion with a stationary shear blade Si@ which is secured thereto by screws 53, and extends through slots 63 formed in Walls 32 and 3A. Frame 5E! is provided at its opposite sides with upstanding ears t2 perforated at 64 to receive shaft E6. This shaft @6 is at right angles to the direction of travel of the tape in the machine and is positioned above the planar surface 68 of frame 5t substantially the radius of the feed roller 'iii which is disposed substantially midway between walls 32 and 3.4 and is securely mounted for rotation with shaft 66 by set screw l2.

A yoke 'lli secured by screws 'l5 to the under side of frame 5a is provided at its opposite side walls with vertically disposed grooves 'I6 into which the opposite ends of shaft 'i8 are mounted for sliding movement.

This shaft 'lil carries a roller @t in operative relation with feed roller lil. A resilient member S2 is secured in position, by rivet Sil to yoke 14, so as to engage and pull the tape from the roll and feed it from the machine. It will be observed the frame 53 is provided with a central opening 86 through which roller it extends.

Shaft ii extends outwardly beyond ear 52 at one side of the machine to receive the crank 83 having handle Si?. The hub t2 of crank B8 is slotted at 94 to receive pin Sit vwhich is securely mounted radially in shaft to. The s lot 84 is of suflicient length to allow free movement of the crank as the pin @ii remains stationary for reasons hereinafter set forth.

Since it is very desirable to feed out definite predetermined lengths of tape, it is found convenient to provide means whereby the operator can stop the feedroller at the proper point at each complete revolution of roller it which has a circumference equal to the desired unit length of tape. The means suitable for this purpose is best shown in Figs. 6 and '7. The sleeve 98 partially cut away at carries a pawl |02 pivoted to 98 at |04 and has an ear |05 adapted to contact the radial wall of seleeve 98 to limit the outward swinging of the free end of the pawl. A stop pin |08 carried b-y ear 62 above and just outside the periphery of sleeve 98 is in the path of travel of pawl |02 when the crank 88 is rapidly moved in a clockwise direction to feed the tape from the machine. In Fig. '7 the pawl |02 is shown in solid lines in the extended position to engage stop pin |08 to prevent further rotation of the feed roller 10. In the operation of the machine when the operator wishes to feed out just one unit of length of the tape he rotates crank 8B rapidly for one revolution. This will cause the pawl |02 to be thrown outwardly until ear |05 strikes wall |08 when the pawl will engage stop pin |08 to limit the feeding of the tape. Should the operator desire to deliver more than one unit length of tape he permits the pawl |02 to fall by gravity to the dotted position shown in Fig. 7 and continues to the clockwise movement of the crank. This operation can be repeated to obtain any desired length of tape. When the feed roller 'EQ has made a full revolution and the pawl |02 has engaged pin |06 a pawl H0 carried by sleeve H2 at the other end of shaft 66 drops by gravity to engage behind stop pin Il carried by ear 62 to prevent reverse movement of shaft 56. Sleeve H2 is secured by set screw H6 to shaft 5S and has a radial wall H3 against which the ear |20 of pawl H0 strikes to limit its outward movement. It will be noted that both the pawls |02 and H0 are very similar but that the one works b-y centrifugal force to position against the stop pin |03 while the other pawl H0 works by gravity, when the rotation stops, to be positioned in alignment'with stop pin IM.

Referring now particularly to the tape serving means reference will be had to Fig. 5 wherein is shown a knife or shear blade |22 pivoted to stationary blade 56 by means of pin |24. A shoulder |25 formed on blade |22 contacts stop member |28 carried by stationary blade 55 to limit the upward movement of blade |22, also the spring |353 mounted on pin |23 with one of its ends secured to blade |22 and its other end secured to case wall 32 is so wound as to exert a lifting movement of blade |22. The outer end of blade |22 is provided with a finger |32 pivoted at I3@ and disposed in the path of travel of crank 85. Due to the force of gravity the fingers |32 will normally retain the position shown in Fig. 5 and as the crank is moved in a clockwise direction to feed the tape the fingers will move upwardly against stop |36 to permit the passage of the crank. When it is desired to sever the tape after the operator has moved the` crank to the position described above he reverses the crank movement so that it will contact finger |32 to move blade downwardly against the action of spring |30 for a shearing action with blade 50 with the tape I6 therebetween.

After this shearing operation the spring |30 returns the blade to the raised position. During this shearing operation the pin 96 stands still and the slotted hub of the crank moves thereabout a sufficient distance to complete the operation. With this pawls and finger operating as described above it is apparent that any number of unit lengths may be measured and cut off without any special adjusting or manipulation other than the operation of the crank 88.

In order to feed different unit lengths of tape a plurality of holes 64 is provided in each of the ears 52 to receive shaft 03, see Fig. 4.

Since many minor changes might be made in the various parts of this machine without departing from the spirit of the invention, it is desired to be limited only by the scope of the claims.

Having thus described the invention what is claimed as new and desired to be protected by Letters Patent is:

l. In a tape dispensing machine a master feed roller mounted on a transverse shaft, a floating feed roller resiliently urged toward said master feed roller, a crank mounted for limited free movement on said shaft to drive said master roller through one or more full revolutions; a centrifugally operated ratchet adapted to limit the feeding of the tape to pre-determined unit lengths; and ratchet means to prevent reverse movement of said feed rollers at each revolution of the master feed roller.

2. In a tape dispensing machine a master feed roller mounted on a transverse shaft, a oating feed roller resiliently urged toward said master feed roller, a crank mounted for limited free movement on said shaft to drive said master roller in one direction only; a centrifugally operated ratchet adapted to limit the feeding of the tape to pre-determined unit lengths; and gravity operated ratchet means to prevent reverse movement of said feed rollers at each revolution of the master feed roller.

3. In a tape dispensing machine a master feed roller mounted on a transverse shaft, a oating feed roller resiliently urged toward said master feed roller, a crank mounted for limited free movement on said shaft to drive said master roller; a contrifugally operated ratchet adapted by varying the speed of revolution of said crank to limit the feeding of the tape to pre-determined unit lengths; gravity operated ratchet means to prevent reverse movement of said feed rollers at each revolution of the master feed roller; and a cutting blade operable by said crank as said master roller is idle, to sever said tape.

4. In a tape dispensing machine a master feed roller mounted on a transverse shaft, a driving crank mounted for limited free movement on said shaft and operable to rotate said master feed roller through any desired number of complete revolutions; a centrifugally operated pawl carried by said shaft to stop the rotation of said feed roller at each revolution when it is rotated above a pre-determined rate of speed, and a gravity pawl operable to prevent reverse movement of said feed roller when it is stopped by said centrifugally operated pawl.

5. In a tape dispensing machine a master feed roller mounted on a transverse shaft, a driving crank mounted for limited free movement on said shaft and operable to rotate said master feed roller through complete revolutions; a centrifugally operated pawl carried by said shaft adapted to stop the rotation of said feed roller at each revolution when it is rotated above a pre-determined rate of speed and to permit unlimited rotation thereof when it is rotated below said predetermined rate of speed; a gravity pawl operable to prevent reverse movement of said feed ro-ller when it is stopped by said centrifugally operated pawl, and a blade operable by said crank when the feed roller is at rest, to sever sections from said tape.

HARRY F. GILLIAM.

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