US2723601A

US2723601A - Box making machines

Info

Publication number: US2723601A
Application number: US225819A
Authority: US
Inventors: George S Sillars
Original assignee: Hoague Sprague Corp
Current assignee: Hoague Sprague Corp
Priority date: 1951-05-11
Filing date: 1951-05-11
Publication date: 1955-11-15
Anticipated expiration: 1972-11-15

Description

Nov. 15, 1955 e. s. SILLARS 2,723,601

BOX MAKING MACHINES Filed May 11, 1951 4 Sheets-Sheet 1 29 fiwen for George 6. Sil/oms Nov. 15, 1955 G- S. SILLARS BOX MAKING MACHINES Filed May 11, 1951 4 Sheets-Sheet 2 LJ: 168 100 g; F15 2 p film A \\Q\\. 1

fizz/622102" George SSz'lZars Nov. G. S. SILLARS' m N BOX MAKING MACHINES Filed May 11- 1951 4 Sheets-Sheet 3 100 m/amor George SSilZarzs yhz' Azzor ey fla WM m e12 214 98 Nov. 15, 1955 G. s. SILLARS 2,723,601

BOX MAKING MACHINES Filed May 11, 1951 v 4 Sheets-Sheet 4 ,2 L 226\ J Z p e 3 f L] 230 511/612 for George 6767 Hans .Byhz's '2107 r- United States Patent OfiFice 2,723,601 Patented Nov. 15, 1955 BOX MAKING MACHINES George S. Sillars, Beverly, Mass, assignor to Hoague- Sprague Corporation, Lynn, Mass., a corporation of Massachusetts Application May 11, 1951, Serial No. 225,819 14 Claims. (Ci. 93-363) This invention relates to machines for making boxes and is illustrated as embodied in a machine of the type in which an operator successively presents opposite ends of a box blank to box-forming mechanisms. An object of the invention is to provide improved mechanism of simple construction by which a box blank of a conventional type having a body portion, side wings, end wings, corner laps and end wing extensions, is formed very rapidly into a completed box.

In forming a box on the machine illustrated herein, a box blank, the side wings of which have been folded by the operator at right angles to the bottom, is presented on end with the bottom in a vertical plane and one end wing extending downwardly, to a member by which the corner laps are folded inwardly toward each other and is then moved by the operator past mechanism by which glue is applied to the inner face of the downwardly extending end wing, between rolls which bend the end wing extension at a right angle to the end wing, past a plow which bends the end wing into a horizontal plane in contact with the corner laps and then onto a work support which forms one of a pair of members for pressing the end of the box to cause the end Wing to adhere firmly to the corner laps and the end wing extension to be bent over into engagement with the inner surfaces of the corner laps.

In accordance with a feature of the invention, one of the pressing members is in the form of an abutment which is normally out of register with the support and is moved into register with the support by power-operated mechanism. when the box blank has moved into position for the end-pressing operation, there being means operative upon movement of the abutment into register with the support for moving the support upwardly to press the box end between the support and the abutment. As illustrated herein, fluid-pressure-operated mechanism is employed. for successively moving the abutment and the support to press the end of the box blank.

The above and other features of the invention including various details of construction and novel combinations of parts will now be described by reference to the drawings and pointed out in the claims.

In the drawings,

Fig. 1 is a front elevation of one form of machine embodying the invention;

Fig. 2 is a side elevation, partly in section, of the pressing mechanism of the machine;

Fig. 3 is a front elevation on a larger scale of the work support forming part of the pressing mechanism;

Fig. 4 is a plan view of a portion of the pressing mechanism;

Fig. 5 is a schematic view of the fluid pressure system for operating the pressing mechanism;

Fig. 6 is a diagrammatic view of the electrical circuits for controlling operation of the machine;

Fig. 7 is a detail view of a portion of the pressing mechanism illustrating the operation of the trigger by an advancing box, the end of which is to be pressed; and

Figs. 8 and 9 are detail views in side elevation of the pressing members in different relative positions.

As illustrated in Fig. 1, the machine includes a base composed of a pair of spaced supporting bars 10 extending forwardly and rearwardly of the machine and carrying a pair of spaced vertical posts 12 connected at the top by a crosshead 14. Extending laterally from one of the posts 12 is a supporting arm 16 secured at 18 to a bracket 20 which is in turn secured in a suitable manner to the adjacent post 12. The arm 16 carries various intrumentalities for preparing the box blank for the end pressing operation.

These instrumentalities include a table 22 along which the inturned corner laps of a box blank are guided with the end wing of the box blank extending downwardly below the table and in the same vertical plane as the bottom of the box. The table 22 includes an inclined portion 24 joined to a horizontal portion 26 by a curved portion 28. In starting a box blank through the machine the operator turns the side wings of the blank at right angles to the body of the blank and imparts a preliminary inward bend to the corner laps which are then presented to the

portions

24, 26 of the table 22 which operate when the blank is pressed downwardly to complete folding of the corner laps as described more fully in Letters Patent of the United States 2,393,383, granted January 22, 1946, on an application of C. D. Knowlton.

The box is then advanced along the table 22 to the left with the corner laps held against the top surface of the table and the downwardly extending end wing passes through a glue applying mechanism 30 which may be of the type illustrated and described in Letters Patent of the United States 2,338,138, granted January 4, 1944, on an application filed in my name. This mechanism includes a glue roll 32 rotated by a motor 34 carried by a bracket 36 secured to the right hand post 12. Upon rotation of the roll 32 adhesive is carried upwardly from a reservoir 38 and deposited on the inner surface of the downwardly projecting end wing and end wing extension of the box blank, so that when the end wing is subsequently turned into engagement with the corner laps it is secured thereto by the adhesive coating.

Carried by the arm 16 beyond the glue mechanism 30 in the path of movement of the box blank is a pair of rolls 40 carried by shafts journaled in a bracket 42 which is secured to the arm 16 for vertical adjustment by a screw and slot connection 44. These rolls are arranged to engage opposite sides of the blank along the crease which separates the end wing and the end wing extension of the box blank and impart a preliminary bend of the end wing extension with respect to the end wing, as illustrated and described more fully in Letters Patent of the United States 2,186,977, granted January 16, 1940, on an application filed in the name of C. D. Knowlton. Also carried by the bracket 42 is a guide plate 46 the purpose of which is to guide the depending end wing extension into the bight of the rolls 40.

Mounted at the left of the table 22 and carried by the bracket 20 is a plow 48 having a curved or scroll-shaped surface with which the end wing contacts during movement of the blank to the left to turn the end wing into a horizontal plane in contact with the inturned corner laps. From the plow 48 the blank moves onto a lower presser member or work support 50 the top surface of which is in substantially the same horizontal plane as the portion 26 of the table 22 and a guide surface associated with the plow 48 over which the blank is carried to the work support 50..

Associated withthe work support 50 is a front guide wall 52 (Figs. 3, 4, 8 and 9) hinged at 54 to the work support 50 and normally held in the position illustrated in the drawings by a spring 56 (Fig. 4) connected between a pin 58 projecting from an end of the guide wall 52 and a pin 60 projecting laterally from the work support. The purpose of thus mounting the front guide wall will appear as the description proceeds.

To limit the extent of movement of the box blank to the left over the work support 50 so that it will be arrested in its movement in the correct position for the end pressing operation, a bar 62 providing a stop is adjustably carried by the guide wall 52 in position to be engaged by the advancing side wall of the box blank. For thus carrying the stop 62 the guide wall 52 is slotted at 6 (Fig. 3) to receive a clamping screw 66 (Fig. 4) threaded into the stop 62, there being a washer 68 between the head of the screw and the front surface of the guide wall 52. it will be obvious that upon loosening the clamping screw 66 the stop 52 may be moved lengthwise of the guide wall 52 along the support 50 to whatever position is desired depending upon the size of the box the end of which is to be pressed, after which the clamping screw 66 is tightened to lock the stop 62 to the guide wall 52.

The movement of the box over the work support 50 toward the stop 62 initiates the operation of the mechanism for pressing the end of the box. For this purpose there is pivoted to the guide wall 52 by means of a screw 70, a trigger 7 2 which is positioned, as shown most clearly in Fig. 7, to be engaged by a box blank B in its movement over the work support 50. Pivoted to the lower end of the trigger 72 is a cam plate 74 which is arranged to depress momentarily a switch button 76 upon counterclockwise movement of the trigger 72 by the advancing box blank. The work support is recessed at 78 to receive the trigger '72 and permit it to move into a horizontal position during advance of the box blank over it into engagement with the stop 62. After the end of the box has been pressed, as Wili be hereinafter described, the box is removed from the support 50 whereupon the trigger 72 moves under the influence of gravity in a clockwise direction back to its initial position. During this movement of the trigger the cam 74 pivots in a counterclockwise direction about its supporting pin and passes freely over the button 76 without again depressing the button.

Cooperating with the support 50 in pressing the end of the box is an abutment 82 (Figs. 8 and 9) which moves forwardly or to the left as viewed in Fig. 8 into the interior of the box in response to movement of the trigger 72 by the advancing box blank. During this movement, the abutment turns the end wing extension E from an upstanding position as shown in Fig. 8 downwardly into contact with the inner surfaces of the corner laps, as

shown in Figs. 8 and 9. The lower portion of the abutment is inclined at 84 to facilitate this turning movement of the end wing extension. After the abutment has moved into the box as shown in Fig. 9, the support 50 is moved upwardly so that the end of the box is pressed between the support and the abutment, causing the end wing to be firmly secured to the corner laps after which the support moves downwardly and the abutment moves out the box permitting the box to be removed from the machine. he box may now he turned end for end and the other end of the box completed in the same manner. The hinged support for the front guide wall 52 permits the guide wall to be moved forwardly toward the operator in the event that the operator should inadvertently place his fingers between the bottom of the box and the guide wail during forward movement of the abutment 32 thus afiording protection against severe damage to the operators fingers. Also associated with the support 50 is a guide block 86 w ich is adjustably clamped to the support by a screw 88. This block serves the purpose of engaging the top edge of the box thus insuring that the bottom of the box is maintained in contact with the front guide wall 52 upon movement of the box onto the support The work support 50 is carried for vertical movement by a bracket 90 (Figs. 1 and 2) which is secured to the vertical posts 12. This bracket is provided with a vertical bore 92 slidable in which is a sleeve 94 carried by and depending from the support 50. The support normally rests on the upper surface of the bracket but is moved upwardly by a rod 96 carried by and extending upwardly from a piston 98 in a cylinder 100 carried by brackets 102 (Fig. l) clamped to the lower portions of the posts 12. With the piston in its lowermost position in the cylinder 100 the top of the piston rod 96 is spaced from the undersurface of the support 50 so that during the initial upward movement of the piston no motion is imparted by the rod 96 to the support 50, the purpose of which will appear as the description proceeds. Toward the end of the upward movement of the piston 98 the upper end of the rod 36 engages the undersurface of the work support to move the support upwardly out of engagement with the bracket 90. There is thus provided a lost motion connection between the piston rod 96 and the support 50. When the piston is returned to its lowermost position the work support 50 moves by gravity downwardly into engagement with the bracket 90 into the position shown in Figs. 1 and 2.

The abutment 82 forming the upper press member is carried by a slide 1M which of I-beam formation and is guided for forward and rearward movements between the crosshead 14 and a supporting member 106 secured to the posts 12. Guide plates 103 (Fig. 1) secured to the supporting member 106 prevent lateral movement of the slide 104 during its forward and rearward movements. The supporting member 106 is provided at its rearward portion with an upwardly extending car 110 (Fig. 2) through which is threaded a screw 112 secured in adjusted position by a lock nut 114 and carrying at its forward portion a block 116 of leather or other suitable material acting as a stop to limit rearward movement of the slide 104-. For limiting forward movement of the slide 104 it is provided at its rearward end with 21 depending car 118 through which is threaded a screw 120 carrying a block 122 similar to the block 116 of the screw 112. This block is arranged to engage a vertical surface 124 of the supporting member 106 at a predetermined point in the forward movement of the slide 104.

The initial upward movement of the piston 98 during which the upper end of the rod 96 is moving toward the undersurface of the support 50, is utilized to move the abutment 82 forwardly into the interior of the box. For this purpose the piston rod has fixedly secured to it spaced collars 126 between which is received a roll 12S journaled in an arm 130 of a bell crank lever pivotally carried by a pin 132 which is in turn carried by bearings 134 (Fig. 1) of a bracket 136 secured to the posts 12. The other arm 138 (Fig. 2) of the bell crank lever is pivoted to a rearwardly and upwardly extending connecting rod 140 provided with a slot 142 in which is received a roll 144 journaled on a pin 146 carried by a lever 150 pivoted at 152 to the bracket 136. The upper end of the lever 150 is connected by a link 154 to the ear 118 on the slide 104. A compression spring 156 acting between a boss 158 on the lever 150 and a screw 160 threaded into the rear end of the connecting rod 140 normally maintains the parts in the relative positions shown with the roll 144 seated against the left end of the slot 142. Upon initial upward movement of the piston 98 the bell crank lever 130, 138 is moved in a clockwise direction and the lever 150 is moved in a counterclockwise direction by forward movement of the connecting rod 140 acting through the spring 156, thus moving the slide 104 and the abutment 82 forwardly to carry the abutment into the box. Upon engagement of the block 122 with the surface 124 forward movement of the slide 114 is arrested but the piston 98 can continue to move upwardly during which time the connecting rod 140 moves forwardly relative to the lever 150, this movement being permitted by the lost motion connection afforded by the slot 142 in which the roll 144 is received. During this final upward moves ment of the piston 98, after the abutment 82 has fully entered the box, the upper end of the piston rod 96 engages the support 50 and moves it upwardly to apply heavy pressure to the end of the box.

For supplying pressure fluid to the lower end of the cylinder 100 to force the piston 98 upwardly, a pump 162 (Fig. 1) is mounted in a reservoir 164 below the motor 34.. The motor is connected by a pulley 166, shaft 168 and coupling 170 to the pump 162 which is designed to be operated continuously. To provide suflicient fluid capacity for the machine, a second reservoir 172 is mounted between the supporting bars and the reservoirs are connected by a pipe 174. A fluid pressure accumulator 176 secured to the left supporting post 12 normally contains a supply of fluid under pressure which is made available upon operation of the trigger 72 by the box blank to force the piston 98 upwardly. The use of this accumulator makes possible rapid movement of the piston 98 without the necessity of employing a pump of high capacity, the pump operating to store fluid under pressure in the accumulator between operations of the press members.

The fluid pressure system for moving the piston 98 upwardly is illustrated diagrammatically in Fig. 5. The parts are illustrated in the positions assumed when the support 50 and abutment 82 are in their retracted positions illustrated in Fig. 2. It will be seen that the pump is connected through a valve 178 and pipe 180, check valve 182 and a pipe 184 to the accumulator 176. As stated above, the pump is operated continually and consequently the pressure fluid ismaintained under a predetermined pressure in the accumulator 176, the pressure being determined by an adjustable relief valve 186 which controls communication between the high pressure side of the pump and reservoir by way of

pipes

188, 190. It will be understood that the upper portion of the accumulator contains air which is compressed upon forcing pressure fluid into the accumulator, the amount of fluid forced into the accumulator, and consequently the pressure maintained therein being determined by the relief valve 186, which permits the fluid to flow from the pump back to the reservoir upon the attainment of a predetermined pressure in the accumulator. i

The valve 178 includes a pair of

connected valve elements

192, 194 having a valve stem 196 connected to one end of a lever 198, the other end being pivoted to an armature 200, the position of which is controlled by a pair of solenoid coils 202, 204. The

valve elements

192, 194 control communication between the high pressure side of the pump and

pipes

206, 208 respectively which are in turn connected to opposite ends of a valve 210 having connected

valve elements

212, 214 which are positioned in accordance with the flow of pressure fluid through either pipe 206 or pipe 208. With the parts in the positions illustrated, high pressure fluid from the pump 162 flows through valve 178 and pipe 208 into the right end of the valve 210 thus holding the

valve elements

212, 214 in the positions illustrated. At this time communication between the accumulator 176 and the cylinder 100 through

pipes

184, 216 and 218 is prevented by the valve element 214.

Upon movement of a box blank onto the work support, actuating the trigger 72, the solenoid 204 is energized as will be explained, thus shifting the armature 200 to the right and moving the

valve elements

192, 194 of the valve 178 to the left. The high pressure side of the pump is now connected through valve 178 and pipe 206 to the left end of the valve 210 shifting the

elements

212, 214 to the right and providing communication between the accumulator and cylinder 100 through

pipes

184, 216, 218, thus operating the abutment and the support as heretofore described. It will be noted that during this operation of the machine, the only work required of the pump is that of shifting the

valve elements

212, 214 to the left and the fluid under pressure in the accumulator is employed to force the piston 98 upwardly. After the pressing operation is complete the solenoid 202 is energized to shift the armature 200 to the left returning the

valve elements

192, 194 to the positions shown and connecting the high pressure side of the pump to the left side of valve 210 to shift the

valve elements

212, 214 to the right. The pressure fluid in the cylinder 100 now exhausts through pipe 218, valve 210 and pipes 220 and to the reservoir. The piston 98 is forced downwardly by a heavy spring 222 (Fig. 2) acting between the collar 126 and the underside of the bracket 90. Inasmuch as the pump is in continuous operation pressure fluid is forced back into the accumulator to replace that which was employed in the pressing operation until the pressure of the fluid reaches a value determined by the setting of the valve 186. Sufiicient time elapses between successive pressing operations to recharge the accumulator and a small pump may accordingly be employed to obtain the high pressures required to press the ends of boxes.

The electrical system for controlling energization of the solenoid coils 202, 204 of Fig. 5 is illustrated diagrammatically in Fig. 6. The button 76 (Fig. 7) operated by the trigger 72 as heretofore described causes momentary closure of a normally open switch 224 which is mounted on the front of the bracket 90, as shown in Figs. 1 and 3. Closure of this switch energizes the coil 226 of a relay 228 as follows: From line wire L, switch 224, wire b, coil 226 and wire 0 back to a line wire L1. Energization of the relay coil 226 causes a switch arm g of the relay 228 to connect contacts e and f and a holding circuit through the coil of the relay is established as follows: From line wire L, wire h, contact j of a switch 230, wire k, contact e, switch arm g, contact 1, wires l, m, coil 226 and wire c to line wire L1. Thus it is necessary only for the switch 224 to be momentarily closed to energize relay 228 which will remain energized as long as contact j of switch 230 remains closed. A circuit is now completed through the solenoid coil 204 as follows: From line wire L, wire h, switch 230, wire k, contacts e, f of relay 228, wires 1, n, coil 204 and wire 0 to line wire L1. This energization of solenoid 204 directs pressure fluid from the accumulator to the cylinder 100 as heretofore described.

As soon as the support 50 moves upwardly to press the end of the box between it and the abutment 82, the arm of switch 230 is moved to engage a second contact p. As shown in Fig. 1, the switch 230 is mounted on the left hand post 12 of the machine and is actuated by an arm 232 secured to the underside of the support 50 so that with the support in its upper position the arm 232 contacts a button 234 of the switch 230 moving the switch arm (Fig. 6) into engagement with the contact p. This opens the circuit heretofore described through the coil 226 of the relay 228 whereupon the armature moves back into the position shown in Fig. 6 de-energizing the solenoid coil 204. At the same time the solenoid coil 202 is energized as follows: From the line wire L through wire h, switch 230, contact p, wire q, coil 202, and wire r back to the line wire L1. Energization of coil 202 moves the valve elements 192, 194 (Fig. 5) back to the positions illustrated whereupon the piston 98 is moved downwardly by the spring 222 (Fig. 2). The support 52 descends under the influence of gravity, carrying arm 232 out of contact with the button 234 of the switch 230 whereupon the arm of the switch moves back into the position illustrated in Fig. 6 which is its normal position.

In the operation of the machine the operator takes a box blank and folds the side wings at right angles to the body of the blank and partially folds the corner laps at one end of the box toward each other. The box blank is then presented vertically to the machine with the corner

laps engaging surfaces

24, 26 of the table 22 and forced downward to turn the corner laps at right angles to the side wings. The box blank is now moved to the left with the end wing passing through the glue mechanism 30 to receive a coating of adhesive on its inner surface, into the bight of the rolls 40 to turn the end wing extension at right angles to the end wing, through the plow 48 which turns the end wing extension into a horizontal plane against the corner laps and onto the work support 50. As the box blank is moved over the work support, the trigger 72 is actuated to close momentarily the switch 224 which energizes relay 228 (Fig. 6) causing the solenoid coil 204 to be energized.

Valve elements

192, 194 are now shifted to the left (Fig. whereupon

valve elements

212, 214 move to the right thus directing pressure fluid into the cylinder 100 from the accumulator 176 forcing the piston 98 upwardly. It will be noted that the trigger 72 is so located that it will be actuated prior to the completion of movement of the box blank over the work support into engagement with the stop 62. Accordingly at the time that movement of the box blank has been completed the abutment 96 is moving into the box. By so locating the trigger 72, operation of the press mechanism is speeded up thereby providing for high speed operation and maximum output of the machine. If desired, provision may be made for adjusting the position of the trigger along the direction of travel of the box blank over the work support so that the speed of operation of the press will correspond to the speed at which the operator is able to carry the box blank over the work support.

As soon as the abutment moves into the box the lost motion between the piston rod 96 (Fig. 2) and the work support is taken up and work support moves upwardly to press the end of the box between the work support and the abutment 82. Immediately upon reaching its uppermost position the arm 232 (Fig. 1) on the work support actuates the switch 230 which energizes solenoid 202 (Fig. 5) and the parts are returned to the positions illustrated. The pressure exerted on the end of the box is sufficiently high so that the box end need be maintained under pressure only momentarily.

The initial position of the abutment 82 is readily adjusted by adjusting the position of the block 116 which is preferably so positioned that the abutment is adjacent to the top edge of the box, thus reducing its required travel, and hence the travel of the piston 98 to a minimum. The forward position is determined by the position of block 122.

Having thus described my invention what I claim as new and desire to secure by Letters Patent of the United States is:

l. A box making machine comprising a support for a box end, an abutment normally out of register with said support, a power-operated member, means connecting said member to said abutment to move the abutment into register with the support, and means including a lost motion connection between said member and said support for moving said support toward the abutment after the abutment has moved into register with the support.

2. A box making machine comprising a support for a box end, an abutment normally out of register with said support, a fluid-pressure-operated member, and means connecting said fiuid-pressure-operated member to said abutment and to said support for first moving the abutment into register with said support and for thereafter moving said support toward said abutment to press a box end positioned on the support.

3. A box making machine comprising a support for a box end, an abutment normally out of register with said support, a fluid-pressure-operated member, means connecting said fiuid-pressure-operated member to said abutment and to said support for first moving the abutment into register with said support and for thereafter moving said support toward said abutment to press a 8 box end positioned on the support, and means for variably controlling the out-of register position of said abutment.

4. A box making machine comprising a vertically movable support for supporting a box on end, an abutment movable horizontally into the box over the inner surface of the box end on the support, and a fluid-pressure-operated member for first moving the abutment into the box and for then moving the support toward the abutment to press the end of the box between the support and the abutment.

5. A box making machine comprising a vertically movable support for supporting a box on end, an abutment movable horizontally into the box over the inner surface of the box end on the support, fluid-pressureoperated means, means connecting said fluid-pressureoperated means and the abutment to move the abutment into the box, and means connecting the fluid-pressureoperated means and the support for moving the support toward the abutment, said last named means including a lost motion connection whereby the abutment is moved into the box prior to movement of the support by the fiuid-pressure-operated means.

6. A box making machine comprising a vertically movable support for supporting a box on end, an abutment movable horizontally into the box over the inner surface of the box end on the support, fiuid-pressure-operated means, means connecting said fiuid-pressure-operated means and the abutment to move the abutment into the box, means connecting the fiuid-pressure-operated means and the support for moving the support toward the abutment, said last named means including a lost motion connection whereby the abutment is moved into the box prior to movement of the support by the fluid-pressureoperated means, and means for adjusting the retracted position of said abutment.

7. A box making machine comprising a guide along which a partially formed box may be advanced manually with the end of the box in contact with the guide, means for operating on the box during its advance along the guide, means at the end of the guide for pressing the end of the box, said last named means including a support substantially in the plane of the guide, a stop associated with said support into engagement with which the box may be moved to locate the box end on the support, an abutment movable into the box from a retracted position for cooperation with the support to apply pressure to the box end, power operated mechanism for moving the abutment into the box and for then moving the support toward the abutment to press the end of the box, and means operated by the box in its movement toward the stop on the support for initiating operation of the power operated mechanism.

8. A box making machine comprising a guide along which a partially formed box may be advanced manually with the end of the box in contact with the guide, means for operating on the box during its advance along the guide, means at the end of the guide for pressing the end of the box, said last named means including a support substantially in the plane of the guide, a stop associated with said support into engagement with which the box may be moved to locate the box end on the support, an abutment movable into the box from a retracted position for cooperation with the support to apply pressure to the box end, power-operated mechanism for moving the abutment into the box and for then moving the support toward the abutment to press the end of the box, a trigger associated with said support and arranged for movement by the box prior to engagement of the box with the stop, and means operated by the trigger for initiating operation of said power-operated mechanism.

9. A box making machine comprising a horizontally arranged support for a box end, an abutment located above but normally out of register with said support, means operative in response to movement of a box onto the support for moving the abutment into the box in register with the support, and means operative upon movement of the abutment into register with the support for moving the support upwardly to press the box end between the support and the abutment.

10. A box making machine comprising supporting means for the end of a box, an abutment normally out of register with the supporting means, a drive member, means connecting said drive member to said abutment to move said abutment into register with the supporting means, said drive member being normally out of engagement with said supporting means but being arranged to engage the supporting means and to move the supporting means toward the abutment after the abutment has moved into register with the supporting means.

11. A box making machine comprising means for supporting the end of a box, an abutment movable from a retracted position into a position within a box on the supporting means, in which position the abutment is in register with the supporting means, means normally maintaining said abutment in retracted position, a member normally out of engagement with said supporting means but movable into engagement therewith and arranged upon further movement to move the supporting means toward the abutment with the abutment in register with the supporting means, means connecting the abutment to said member whereby the abutment is moved from its retracted position into register with said supporting means in response to movement of said member toward said supporting means, and means for thus moving said member.

12. A box making machine comprising means for porting the end of a box, an abutment movable from a retracted position into a position within a box on the supporting means, in which position the abutment is in register with the supporting means, means normally maintaining said abutment in retracted position, a member normally out of engagement with said supporting means but movable into engagement therewith and arranged upon further movement to move the supporting means toward the abutment with the abutment in register with the supporting means, means connecting the abutment to said member whereby the abutment is moved from its retracted position into register with said supporting means in response to movement of said member toward said supporting means, the connecting means including a yielding part whereby the member may move independently of said abutment, means for arresting movement of said abutment upon movement thereof into register with said supporting means, and means for thus moving said member.

13. A box making machine comprising means for supporting the end of a box, an abutment movable from a retracted position into a position with a box on the supporting means, in which position the abutment is in register with the supporting means, means normally maintaining said abutment in retracted position, means for moving the abutment into the box, said last named means being movable in a path transverse to the path of movement of the abutment, and a lost motion connection between the moving means and the supporting means whereby the supporting means is moved toward the abutment only after the abutment has moved into register with the supporting means.

14. A box making machine comprising means for supporting the end of a box, an abutment movable from a retracted position into a position within a box on the supporting means, in which position the abutment is in register with the supporting means, means normally maintaining said abutment in retracted position, driving means including a rod normally spaced from the supporting means but movable toward and into engagement with the supporting means, means connecting said rod to said abutment for moving the abutment from retracted position into register with the supporting means in response to movement of the rod toward the supporting means, and means for thus moving said rod for first moving the abutment into register with the supporting means and for thereafter moving the supporting means toward the abutment.

References Cited in the file of this patent UNITED STATES PATENTS 743,884 Ketcheson Nov. 10, 1903 1,631,492 Labombarde June 7, 1927 1,864,479 Ware June 21, 1932 1,929,703 McDonough Oct. 10, 1933 1,946,198 Dunlap Feb. 6, 1934 1,975,010 Kronquest Sept. 25, 1934 2,249,432 Moeller July 15, 1941 2,393,383 Knowlton Jan. 22, 1946 2,464,407 Levkolf Mar. 15, 1949 2,521,996 Ray et a1. Sept. 12, 1950 2,567,232 Nordquist Sept. 11, 1951