US3250052A

US3250052A - Bottom wrap inserter

Info

Publication number: US3250052A
Application number: US227898A
Authority: US
Inventors: Frank S Hyer
Original assignee: Cutler Hammer Inc
Current assignee: Cutler Hammer Inc
Priority date: 1962-10-02
Filing date: 1962-10-02
Publication date: 1966-05-10
Anticipated expiration: 1983-05-10

Description

May l0, 1966 F. s. HYER 3,250,052

BOTTOM WRAP INSERTER Filed Oct. 2, 1962 '7 Shesar,s-Sheefl 1 www l mi 30a ,www /3 L? Q l l Lihl: l312 if@ WY i mi 306 1 j 255 7 Sheets-Shea?I 2 Filed OCT.. 2, 1962 Nm Nm. www www WNV May 10, 1966 F. s. HYER 3,250,052

BOTTOM WRAP INSERTER Filed Oct. 2, 1962 '7 Sheets-Sheet 3 May l0, 1966 F. s. HYER BOTTOM WRAP INSERTER '7 Sheets-Sheet 4 Filed OGC. 2, 1962 May 10, 1966 F. s. HYER BOTTOM WRAP INSERTER Filed 00T.. 2, 1962 '7 Sheets-Shea?l 5 May l0, 1966 F. s. HYER 3,250,052

BOTTOM WRAP INSERTER Filed oct. a, 1962 fr sheets-sheet e o @wh 8 o /08 /06 /06 [08 -2-0 May 10, 1966 F. s. HYER BOTTOM WRAP INSERTER '7 Sheets-Sheet 7 Filed Oct. 2, 1962 41T D w u T 2 m /wllll E 4 L U. w 3 e 5 c f 5 fmw k m o w. M w D N @M m M L L H L 6 C c S mm $3 L 5 2 m /C f u, c w m J2 V, T S L S m N o Zff A |O T s \l H y L MAN/FOLD 3,250,052 BTTGM WRAP INSERTER Frank S. Hyer, Whitefish Bay, Wis., assignor to Cutler- Hammer, Inc., Milwaukee, Wis., a corporation of Delaware Filed Oct. 2, 1962, Ser. No. 227,898 7 Claims. (Cl. 53-66) This invention relates to bottom sheet wrap inserting machines.

A certain feature of the invention disclosed in the present application is disclosed and claimed in copending application Serial No. 227,929, Frank S. Hyer and John H. Trumble, inventors, filed October 2, 1962 and assigned to the assignee of the present application.

While not limited theerto, the machine of the present invention is particularly suited for inserting sheet wraps under stacked articles such as newspapers and the like.

Bottom wrap inserting machines `which pay off a length of we'b from a roll supply under moving articles and then cut it off from the roll to a predetermined length are well known. These have taken various forms, but have commonly employed relatively expensive-to-build web cut-off mechanisms. Prior constructions have also left much to be desired as to ease of initial threading of a web from a new supply roll, and providing easy access to the web 'drive and cut-off mechanism for maintenance and clearing of web jams.

It is therefore a primary object of the present invention to provide an improved bottom Wrap inserting and cut-off machine of a construction providing ready and easy access to the web drive and cut-olf mechanism and which permits use of a simple type of web cut-off mechanism.

Another object o-f the invention is to provide an inserting and cut-off machine of the aforementioned type wherein the wrap is inserted under the articles 'and is positively driven in synchronism with the movement of the articles along a conveyor and appropriately cut off to provide overlap at both ends of the article.

A further object is to provide a machine of the aforementioned type which provides means whereby the length of the articles automatically determines the point at which the wrap web is severedto provide the desired length of sheet wrap. l

A still further object is to feature in the construction for the aforementioned machine limit and interlock switches insuring the safety of the operator.

Still another object is to provide a machine of the aforementioned' type which can be driven by an electric 3,259,052 Patented May 10, 1966 FIG. ll is an opposite end -view of the portion of the device shown in FIGS. 8 to 10, and

FIG. 12 is -a partially diagrammatic and partially schematic view of the control system for the device.

A -bottom wrap inserter machine constructed in accordance with the invention has an incoming conveyor 16 mounted on the left end of a framework as seen in FIGS.

l and 2 and an outgoing conveyor 18 mounted on the opposite end. Also mounted on the frame,

ibetween conveyors

16 and 18, is a cutter drive unit 20. Cutter drive can be removed as a unit by removing lbolts 36. These components are driven through a system of sprockets 'by drive motor individual thereto, or be driven through mey chanical connection by a newspaper stacking machine or the like.

Other objects and advantages of the invention will hereinafter be apparent.

The accompanying drawings illustrate a preferred embodiment which will now be described in detail, in which:

FIGURE 1 is a top plan view of the device;

FIG. 2 is a side elevation of the device with portions of the cover elements broken away;

FIG. 3 is an elevational view of the incoming end of a portion of the device;

FIG. 4 is a sectional view taken along line 4 4 of FIG. 3;

FIG. 5 is a sectional view similar to FIG. 4 showing the operated position of various parts;

FIG. 6 is an elevational view of a subassembly 'with portions broken away;

FIG. 7 is a sectional view taken along line 7-7 of FIG. 4;

FIGS. 8, 9 and 10 are end views of a portion of the device showing it in three different positions;

chain 22, represented by a broken line in FIG. 2. Chain 24, also represented by a broken line, connects the end rollers of outgoing conveyor 18. Chain 22 is driven by motor 26 mounted within the frame of the device. If. it is desired, incoming conveyor 16 may be replaced by the output end of a counter-stacker, such as the one described in Howdle et al. Patent No. 2,819,661, granted January 14y 1958, now Reissue No. 25,018, and chain 22 connected to be driven by the counter-stacker drive.

A roll of wrapping paper 28 is mounted on a cradle assembly 30 and positioned in an opening of the frame lbelow conveyor 18. This assembly can be positioned to load the roll from either side of the device. The roll is slid over a spindle 30a fand then-held firm by threading a hub Sb snugly against it.

A dancer roll assembly 32 is pivotally mounted on the right-hand leg of the frame at 34. This assembly comprises two substantially L-shaped tubes 32a connected at one. end -by a roller 32b, and holds the paper under tension during the operation of the device. A plate 32e rigidly secured to one of the tubes 32a cooperates with the actuator of a limit switch LSS mountedon the right-hand leg of .the frame for a purpose that will hereinafter be explarned.

As best shown in FIGS. 8-10, the cutter-drive unit co'mprises three main sections; a base or lower section 38, a power or upper section 40, and a pressure roll transfer section 42. These sections and the means for connecting them make up a feature of the invention that will be later described in detail. y

End plates 44 of base section 38 are attached to spacer bars 46 by bolts 48, which also secure angle 'mounting members 50 to the base. Bearing plates 52 are rigidly secured to the upper ends of end plates 44 by screws 54 which take into threaded openings in L-shaped bracket 56 through clearance holes in end plates 44 (see FIGS. 3, 4 and 5). Bearing plates 52 and end plates 44 form the housing for the ball bearings that support a main power shaft 58. A sprocket 60 secured to main power shaft 58 provides the cutter drive unit a driving connection with chain 22 from motor 26.

Also attached to brackets 56 is another pair of brackets 62, which serve as mounting means for curved guide plate 64. Plate 64 is attached to brackets 62 by fiat head screws 66. Clearance yslots 64a have been provided in plate 64 to accommodate rollers 42e of pressure roll transfer section 42.

Pressure roll transfer section 42 is rotatably mounted on main power shaft 5S by ball bearings housed in end pieces 42a. End pieces 42u are bolted to each end of a connecting plate 4211. Shafts 42C and- 42d are also mounted freely rotatable on ball bearings housed within end pieces 42a. Rubber

idler rollers

42e and 42f are non-rotatably attached to shafts 42C and 42d, respectively, in spaced apart relation.

A clevis plate 68 is bolted to connecting plate 42b at approximately its center. A headed clevis pin 68a is inserted through clearance holes in clevis plate 68 and in lever 70 and held in place by a cotter key. The other end of lever 70 is attached to the plunger of air cylinder AC1 4by threading (the plunger extension inlto ra trapped hole in horizontal leg 70a of lever '70. Adjustment of the travel of pressure transfer section 42 may be made by these means, and a nut '70b is threaded against the underside of leg portion 70a to lock the adjustment. Air cylinder AC1 is secured by a clevis plate '72 and a headed clevis pin 72a to mounting plate 74.

A bracket 76 is bolted to connectingplate 42o near its left end (FIG. 3) for attachment thereto of one end of an actuator rod 78 which is pivotally connected at its other end to the actuator of a limit switch L33. Limit switch LS3 is mounted on the left end plate 44 by a pair of screws.

A rod 80 extends between end plates 44 and is secured thereto at each end by bolts 80h. Collars 80a are held in place on rod 80 by set screws, and these collars linearly position a cutter assembly 82. Rod 80 also aids in spacing apart end plates 44, as do spacer bars 46.

Cutter assembly 82 is mounted on rod 80 by yoke portion 82a which has insert bearings 8219 of bronze A* or the like pressed in each leg, affording the assembly free rotation on rod 80. A V-shaped bracket 82C is mounted on yoke portion 82a by bolts 84. The length of this assembly can be adjusted by slots 82d in yoke portion 82a. A cutter blade 82e having a saw-toothed edge, is held in place on bracket 82e by screws 82]c which take into threaded holes in a back-up bar 82g. A bracket leg 82h extends downwardly of yoke portion 82a and is connected to a clevis plate 82j by a headed clevis pin 82k, which is retained by a cotter key. The horizontal member of clevis plate 82j is slotted lengthwise and has a tapped hole at its center. The plunger extension of air cylinder AC2 is threaded into this hole until the proper adjustment of cutter assembly 82 is obtained, and then screws 82m are tightened to hold the adjustment. Air cylinder AC2 is secured by clevis plate 86 and clevis pin 86a to mounting plate 74. A bracket 83 is mounted on spacer bars 46 for mounting a limit switch L86. Limit switch LS6 is actuated by plate 8211 mounted on yoke portion 82a by bolts 84.

A guide plate 90 is mounted between end plates 44 by means of brackets 90a which are secured to each end of plate 90 and screwed to end plates 44. Like guide 64, plate 90 has clearance slots provided to accommodate rollers 42f of pressure roll transfer section 42.

As can more clearly be seen in FlG. 7, plate 90 also houses the cooperating lower portion of the paper stop mechanism 98. A resilient brake lining material 92, such as rubber or the like, is secured lto a backing plate 94 by screws 94a. A 4support plate 96 is fastened to the underside of plate 90 by means of a hinge assembly 96a. A screw 96b also is fastened to plate 90 by nut 95e and extends downwardly from plate 90. Backing plate 94 is then vplaced on `the support plate 96 which is swung into position and held in place by wing nut 96d, tapping backing plate 94 between itself and plate 90. Rubber lining 92 and part of backing plate 94 extend through opening 90b in plate 90 to allow contact with the paper stop assemblyQS. Replacement of worn brake linings is facilitated in this manner.

As can best be seen in FIGS. 4, and 6, upper portion of paper stop mechanism 98 is secured to end plates 44 by bolts 100, which take into threaded holes in mounting frame 98a. Vertical adjustment of such portion of the mechanism 98 is afforded through slots 44a in end plates 44. A U-shaped member 98h is bolted to frame 98a to support paper stop lever 98e. Nylon bearings 98d are inserted into holes in the legs of member 98h and screws 98e penetrate through the bearings and thread into stop lever 98C, leaving it free to pivot. Secured by bolts on top of mounting frame 98a is a bracket 9812 in which is pivotally mounted an air cylinder AC3. A tongued clevis adapter 98g is threaded onto the plunger extension of air cylinder AC3 and positioned in a slot 98h in paper stop lever 98C. A bolt 98j projects through a first clearance hole in the tongue of adapter 93g, and is threaded into a tapped hole in the lever 98e, connecting the air cylinder to the stop lever.

As best shown in FIGS. 2, 3 and 8, power section 40 has its end plates 102 mounted pivotally to the upper end of bearing plates 52 at a pivot point 104. A shaft 106 is nonrotatably bolted between end plates 102 and helps to maintain their spaced relation. An idler roller 106e: is rotatably mounted on shaft 106 and is held against axial movement thereon by collars 10615.

A bearing block 10811 for top plate 108 vis also pivoted on shaft 106 to allow the top plate 108 to be pivoted upward from the power section 40. This will be later explained in more detail. Top plate 108 has a downwardly bent portion 10817 at the incoming end of the unit to prevent loose edges of incoming papers from slipping or snagging under the plate. A slot 108e is also provided in plate 10S for the web 28a of wrapping paper to pass through above the plate and under a stack of newspapers. Clearance slots 108d are also provided for the rolls 116e of power section 40. As best shown in FIGS. 4 and 5, guide

plates

110 and 112 are secured to brackets 114, which in turn are screwed to end plates 102, and along with shaft 106, serve to space end plates 102.

Plates

110 and 112 are also provided with clearance slots to accommodate their respective rollers.

A shaft 116 extends through end plates 102 at both ends of the power section 40, and is mounted in antifriction bearings held by housings secured on the outside of each end plate 102. Rubber drive wheels 116a are non-rotatably secured to shaft 116 in spaced apart relation to cooperate with the rubber idler rollers 42e on shaft 42C. Power is imparted to shaft 116 through a gear 118 non-rotatably mounted thereon which normally meshes with a gear 120 fixed on main power shaft 58. At its other outer end, shaft 116 has a gear 122 fixed thereon which meshes with an idler gear 124, which in turn meshes with a gear 126 fixed on shaft 128 to drive the latter (FIG. 11).

Like shaft 116, a shaft 128 also extends through end plates 102 and is mounted in antifriction bearings within housings bolted on the outside of end plates 102. These housings 130 have special legs 130a formed on them for a purpose to be later described. Shaft 128 also has rubber drive rollers 128a non-rotatably mounted in spaced apart relation to cooperate with rubber idler rollers 421 of shaft 42d.

In article handling systems, the output received is dependent upon a smooth, eflicient operation of all components within the system. The length of time required to restore a breakdown anywhere in the system lowers the output considerably. FIGS. 8-11 in the drawings show a particular feature of the invention which greatly facilitates restoring the cutter-drive unit to working order in a short time should a breakdown or web jam occur therein.

FIGS. 8 and ll are opposite end views of the cutterdrive unit 20 in its latched and operable condition. Power unit 40 is held to base unit 38 by

levers

132 and 134 which are pivoted at and 138, respectively.

Levers

132 and 134 are biased in counterclockwise and clockwise directions, respectively, by tension springs and 141. Lever 134 has an extension 1.34ct to which a disk shaped member 134b is eccentrically mounted to cooperate with the plunger type actuator of a limit switch LS7, mounted on the outside of an end plate 44. Member 134b may be rotated to adjust the tripping point for the limit switch LS.

On the inside of their upper ends levers 132 and 134 have substantially triangular shaped members 142 mounted by pins and screws as shown. These members cooperate with a surface on the leg portions 13061 of bearings 130 to latch power section 40 to base section 38.

Rollers 144 are mounted on

levers

132 and 134 for cooperation with cams 146 which are rigidly mounted on acornmon shaft 148. Shaft 148 extends through the base section 38 and is rotatably mounted in openings in the end plates 44. Spacers 148a (FIG. 3) located between the cams 146 and end plates 44 serve to properly position the assembly. Shaft 148 extends to the outside of the device and operating handles 150 are fixed to each end (FIGS. 1 and 2).

Should a jam occur in the paper web 28a within the cutter-drive unit, the operator turns handle 150 until the rollers 144 snap over the detent portions 146a of cams l 146 (FIG. 9). Detent portions 146a offer -feelof position of cams 146 and serve to hold or lock the latch assembly out of engagement until a positive rotating pressure is applied to handle to overcome the locking action. The action of the cams 146 on the rollers 144 force the

levers

132 and 134 outwardly against the bias of springs 140 and triangular members 142 move out of engagement with leg portions 130:1 of bearing housings 130. Previous to this in the operation of. cams 146 extension 134a of lever 134 moves inwardly, causing member 134:3 to trip safety limit switch LS7 to interrupt electrical power supply to motor 26 and its controls as will hereinafter be more fully explained. The operator can then lift top plate 108 from its position on power section 40. Spring loaded balls held in block l108e cooperate with slots on the inner edges of end plates 192 of power section 40 to give a detent type of latch to plate 108.

These steps completed, the operator can then pivot power section 40 upwardly or counterclockwise as shown in FIG. 10, around pivot point 104,-exposing the inner mechanism of cutter-drive unit 20, and the paper jam. Once the jam is cleared, the procedure is reversed and the device is ready to function again.

The motor 26 of the device is connected to a threephase, 60 cycle, A.C. source of 220 or 440 volts (FIG.. 12)'. The control components for this motor are connected to the more common 110 volt, A.C. source. The connections and components are made readily accessible by mounting them on a controlpanel behind av door 21 in the lower left-hand portion of the frame. A control station is mounted on the device within easy reach of the operator and may be mounted on either side of the device.

The pneumatic control elements are locatediin a drawer in the same location as door 21, but on the opposite side of the device. The air supply manifold, which is located in this drawer, is connected to a suitable source of pressure air supply. y

. FIG. 12 illustrates the device in its at rest state, air pressure being supplied to themanifold and electrical power supplied to the machine, but without connection to the device through the control components. To start the device, a pushbutton start switch S1, mounted on the control station 2S, is momen-tarily depressed t-o cause current flow from A.C. supply line L4 through the start switch S1, a normally closed pushbutton stop switch S2, limit switch LS7 and a relay coil 4CR to A.C. supply line L5. This energizes relay 4CR which :closes its contacts 4CR1 to maintain a circuit around pushbutton S1 when the latter is released. Current also flows from line L4 thro-ugh contacts 4CR1, stop switch S2, limit switch LS7, and main oontactor M to line L5, energizing contactor M which closes its contacts M1, M2 and M3. These contacts connect the motor 26 with mlain powersupply lines L1, L2 and L3, causing motor 26 to run and drive

conveyors

16 and 18 and cutter-drive unit 20 through drive chain 22.

A selector switch S3, also located at the control station 25, is moved t-o its "run position, thus affording a circuit from line L4 through closed contacts 4CR1, stop switch S2, selector switch S3 and relayV SCR to line L5. This energizes relay SCR, which closes its normally open contacts SCRZ, to connect line L4 to line L5 through contacts 1 of limit switch LS1, contacts 1 of limit switch LS3 and an air Valve solenoid 2SOL to energize the latter. Energization of solenoid ZSOL actuates a spring return air valve 2AV, located on the air supply manifold, moving it to its right-hand position against the bias of its return spring. In 'its right-hand position, air vlalve 2AV directs air flow to the bottom of air cylinder ACZ, forcing the cutter assembly 82 upwardly, to its cutting position. Limit switch LS6, actuated by the movement of cutter assembly 82, is thereby opened. p

As a stack of nevrspapersenters incoming conveyor 16, it operates limit switch LS1, closing its contacts 2 and opening its contacts 1 thereby opening the circuit to air valve solenoid ZSOL causing cutter assembly 82 to drop to the position shown in FIGS. 4 and l2. Limit switch L55 consequently recloses and current flows from line L4, through contacts 2 of limit switch LS1, limit switch L86, and an air valve solenoid 1SOL to line L5. Solenoid 1SOL consequently becomes energized and moves its associated spring return air valve to the rig rt-hand position against the bias of the return spring, directing air into the top of air cylinder AC1.. Thus presure roll transfer section 42 is rotated counterclockwise to engage rollers 42f with web 28a and force it against rubber drive wheels 1285: of the power section 40. A manually adjustable air throttling valve 158 is inserted in the line between the bottom end of air cylinder AC1 and the valve 1AV to adjust the rate of flow and thus eliminate bounce of the rubber wheels 42f upon engagement with rub-ber drive wheels 128a. With wheels 42j and 128:1 engaging web 28u, the latter is driven through

guide plates

110 and 64 up .to the top of the device and under the oncoming stack of papers at the same speed that the papers are traveling.

When pressure roll transfer section 42 is rotated counterclockwise it actuates limit switch LS3, thereby opening contacts 1 and closing contacts 2 of the latter. Closure of contacts 2 of limit switch LS3 completes an energizing circuit -for air valve solenoid 3SOL which, upon energization, moves spring return air valve SAV against the bias of its return spring to its left-hand position, directing air into the bottom of air cylinder AC3. This releases the paper lstop brake lever 98e and allows the web 28a to be driven freely by engaged rollers 42f and 128er (FIG. 4).

Web 28a will be driven as long as the stack of papers holds limit switch LS1 in its position 2. When the stack passes beyond the actuator of limit switch LS1 the latter returns to its operating position 1. Solenoid 1SOL then becomes deenergized and Adrops out, the spring return air Valve 1AV moves to its left-hand position, and air ow into the bottom end of cylinder AC1 forces its plunger upwardly, rotating pressure roll transfer section 42 clockwise. Thus, rubber wheels 42e engage web 28a and press it against drive wheels 116e and the latter continue to drive the wrap under the advancing stack of papers, maintaining tension in the web between these rollers and the dancer roller 32h.

The last mentioned movement of pressure roll transfer section 42 also reopens contacts 2 and recloses contacts 1 of limit switch LS3. The then closed contacts 1 of LS3, along with already closed contacts 1 of LS1, cause energiza-tion of air valve solenoid 2SOL, moving air valve 2AV to the right, directing the air ow into the bottom of air cylinder AC2. Cutter assembly 82 is then forced upwardly through the opening between

guide plates

64, 110, and 90, 112, severing paper web 28a (FIG. 5). The points of the saw teeth of the cutter blade 82e puncture the paper due to the tension imparted by the

rollers

42e and 116a and the dancer roller 32h. rl`he continued up wland movement of the cutter assembly and forward movement of the web cause a tearing action to finish the cut.

The oipening of contacts 2 of limit switch LS3 opens the circuit to air valve solenoid SSOL and the latter drops out, allowing air valve 3AV to be spring returned to its right-hand position and direct air flow into the top of air cylinder AC3. This causes movement of paper sto-p lever 98C against web 28a to press it againstrubber brake lining material 92, thereby preventing the web Y28a` from falling out of cutter-drive unit 2d. A pressure regulator valve le) is inserted in the line between air valve SAV and the manifold to govern thel rate and pressure of air fiow to valve AC3.

As web 28a feeds through cutter-drive uni-t 20, roll Z8 is held stationary by an electromagnetic brake BR, mounted on spindle 30a of cradle assembly 30. The dancer roll assembly 32 pivots around pivot point 34., and roller 32h travels upward with the paper web 23a, placing the web under tension. At a predetermined adjusted limit, `the dancer roll assembly 32 closes la limit switch LSS which completes a circuit from line L4, through closed contacts SCRZ, through LSS, and the coil of brake BR to line LS. This circuit energizes the coil of the brake BR thereby withdrawing the brake shoe to release the roll :and allow more paper to pay off under the weight of dancer roll assembly 32, until th-e latter reopens the limit switch LSS.

As can be seen, the device is now ready for another stack of papers, and will continue to function in the above manner upon eachv subsequent actuation of limit switch LSE.. Through adjustment of LS1, the amount of lead and tail of the wrap can be altered, while the length of the stack determines the length of the Wrap. The further upstream on the conveyor the limit switch is placed, the sooner the device will start and therefore the more leading edge will be had. The amount of tail is varied by increasing ordecreasing the length of the actuator of the switch LSE; the longer the arm, the longer the stack holds it depressed, therefore, the greater the amount of tailing edge.

A' limit switch L84 is mounted on the cradle assembly 30 and the actuator of switch LS4 -is depressed against the rear surface of the roll 28, maintaining the contact open. When the diameter of paper on the roll core decreases below a given limit contacts of L84 close thereby energizing paper low indicating light 1S6'at control station 2S. If desired, an audible alarm could be connected in place of light ld, or both could be connected in parallel.

AWhen the operator is ready to load a new roll 28 to the device, he moves selector switch S3 to the LOAD position, opening the circuit to relay SCR, which causes contacts SCRZ to reopen and open the lower part of the circuit connecting the pneumatic controlling solenoids. Deenergization of relay SCR also recloses contacts SCRL which completes the circuit from line L4, through contacts 4CR1, stop switch S2, contacts SCRL and LOAD indicating light 152. to line LS. LOAD indicating light is mounted on control station 2S and is energized when the selector switch S3 is in the LOAD position as described above.

With the power thus shut off to the pneumatic components, the operator can then replace the roll 28, slipping it over spindle 30a and holding itin place by thread-ing hufb 3011 up snug against the front edge of the roll. The web 28a is payed off the top of the roll 28, under roller 3211, over positioning roller 3S, and inserted into the cutter-drive unitvZ. A manual air release valve 154 is mounted on the frame close to the control station 2S, and connected in the line between air cylinder AC3 and air valve SAV. The operator opens this valve, which releases the a-ir pressure on the upper side of the air cylinder AC3 and allows him to 'raise lever 98e of paper web in place. The device is now ready to continue operation upon recl'osure of the selector switch S3 to its run position.

I claim: 4

l, In a device for feeding a web of wrap from a source of supply under a moving article' andv cutting it off to a sheet of predetermined length, the combination comprising a pa-ir of spaced driven rollers, a pair of spaced pressure rollers, means for alternately moving said pressure rollers into web gripping' and driving relation with respective associated ones' of said driven rollers, a webfsevering member movable to' sever the web, and means vfor operating the first mentioned means to etect driving relationv between a driven and one of said' pressure rollers to advance the web between the other driven and pressure rollers and under thearticleiri synchroni'sm: with the movement of the article, saidv last mentionedmeans thereafteraiording reverse operation of the rst mentioned means to eifect driving relation between the other driven and pressure rollers-and' the aforementioned movement of said'web'severing member to provide cut-olf of a sheet of wrap.

2. The combination according t'oclaim 1, wherein said web severing member is pivotally mountedy for movement across the plane' ofy travel of said' web between the cooperating pairs of' said pressure and driven rollers.

3.' The combination accord-ing to claim' ll', together with a member which is loperated whenever the rst mentioned driven and pressure rollersar'e out of' driving relation to grip and hold the'leadi'rig end of the web in position in said device'y between the rst mentioned driven and said one of saidpressu're' rollers.

4. The combination according to claim 3, whereinthe last specified member is pivotally mounted independently of other members.

S. The combination according t'o claim 1, together with a` rotatable shaft onwliich a' roll of web' supply is nonro'tatably mounted, a movableA mechanism including a dancer roll bearing on the web between said shaft and the first' mentioned driven and associated'pressure roller, a rbrake on said shaft normally preventing its rotation and having operating means'energizable to release said brake, and means responsive't'o movement of said mech anism a given amount when the web `is driven by said rst mentioned driven roller to energize the brake operating means.

6. The combination according to claim 3, wherein said web severing member' has a' sa'w toothed edge and'said device includes a movable dancer roll'biased against said web so thattension is maintained in the web between said other driven and pressure rollers and said dancer roll when saidvveb 'severing memberv punctures the web thereby facilitating severing under tearing action.

7. The combination according to claim 3, wherein said meansincludes motor means for each of said members for effecting operation of the same in theA sequence stated.

References Cited by the Examiner UNITED STATES PATENTS 2,273,961 2/-1942 Hoppe 53-66 2,342,584 2/1944 Hoppe 53-66 2,860,462 11/1958 Sykes 53-66 TRAvIs's. McGEHEE, Primary Examiner.

ROBERT E'.- PUL'EREY, GRANVILLE Y. CUSTER,

Examiners. A. FOURNIER? Assistant Examiner.

Claims

1. IN A DEVICE FOR FEEDING A WEB OF WRAP FROM A SOURCE OF SUPPLY UNDER A MOVING ARTICLE AND CUTTING IT OFF TO A SHEET OF PREDETERMINED LENGTH, THE COMBINATION COMPRISING A PAIR OF SPACED DRIVEN ROLLERS, A PAIR OF SPACED PRESSURE ROLLERS, MEANS FOR ALTERNATELY MOVING SAID PRESSURE ROLLERS INTO WEB GRIPPING AND DRIVING RELATION WITH RESPECTIVE ASSOCIATED ONES OF SAID DRIVEN ROLLERS, A WEB SEVERING MEMBER MOVABLE TO SERVE THE WEB, AND MEANS FOR OPERATING THE FIRST MENTIONED MEANS TO EFFECT DRIVING RELATION BETWEEN A DRIVEN AND ONE OF SAID PRESSURE ROLLERS TO ADVANCE THE WEB BETWEEN THE OTHER DRIVEN AND PRESSURE ROLLERS AND UNDER THE ARTICLE IN SYNCHRONISM WITH THE MOVEMENT OF THE ARTICLE, SAID LAST MENTIONED MEANS THEREAFTER AFFORDING REVERSE OPERATION OF THE FIRST MENTIONED MEANS TO EFFECT DRIVING RELATION BETWEEN THE OTHER DRIVEN AND PRESSURE ROLLERS AND THE AFOREMENTIONED MOVEMENT OF SAID WEB SEVERING MEMBER TO PROVIDE CUT-OFF OF A SHEET OF WRAP.