Images

Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
  • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
  • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
  • B26D7/06—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form
  • B26D7/0625—Arrangements for feeding or delivering work of other than sheet, web, or filamentary form by endless conveyors, e.g. belts
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T74/00—Machine element or mechanism
  • Y10T74/15—Intermittent grip type mechanical movement
  • Y10T74/1526—Oscillation or reciprocation to intermittent unidirectional motion
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T83/00—Cutting
  • Y10T83/647—With means to convey work relative to tool station
  • Y10T83/6584—Cut made parallel to direction of and during work movement
  • Y10T83/66—With means to press work to tool

Definitions

• the invention relates an improved bread slicer, and more particularly to novel means for feeding the loaves of bread through the slicing machine, its main object being to propel the loaves at a relatively high speed to the slicing unit thereof and then retard the speed while the loaf is being sliced in order to obtain a greaterproportion of useful slicing time out of the cycle of operation.
• a This object in the present invention is accomplished by means of a double pawl and ratchet mechanism, the pawls being controlled from a double cam.
• One pawl through the action of its cam drives the ratchet and conveyor rapidly,
• Fig. 1 is a side view of the improved bread licer equipped with the novel loaf feed
• Fig. 2 is an enlarged detail view of the pawl and ratchet driving mechanism
• Fig. 3 is a side view of the same.
• a chute adapted to receive a single file 35 of loaves of bread, a slicer unit, and means for separating loaves from said file and advancing them to the slicer unit at a relatively high speed wild advancing them through the slicer unit at a elatively low speed.
• said means includes conveyor mains, driven and idler sprockets over which the chains are trained, cam-actuated fingers adapted to arrest the leading loaf in the file and release it to permit it to slide down the chute it into the path of the flights, and mechanism for driving the driven sprockets at a relatively high speed and then at a relatively low speed.
• the mechanism for driving the driven sprockets at alternately high and low 50 speed includes a shaft to which the sprockets are fast, a ratchet fast to the shaft, arms loosely mounted on the shaft, spring-pawls mounted on the arms to engage the teeth of the ratchet, means for vibrating the arms to cause said pawls successively to engage the teeth of the ratchet and drive the shaft at alternately different speed, and adjusting means for varying the amplitude of the vibratory motion of the arms.
• the loaves L are placed on infeed chute H) which is supported by the side frames II and brackets l2 attached to the frames I I.
• the chute I has adjustable side guides I3 which are attached to rods l4 slidable in the brackets l5 and held in position by set screws iii.
• the leading loaf L of the file of loaves in chute i0 stops against the fingers l'l fast on cross shaft I8 supported in bearings of the brackets 12.
• the fingers [1 are actuated from a cam plate l9 mounted on shaft 20, said cam being engaged by a cam roller 21 carried by a cam lever 22 fulcrumed on a stud 23 set in bracket 24, the other end of lever 22 being connected to one of the fingers I! by rod 25.
• Each revolution of 'cam l9 brings its raised portion 26 into engagement with roller 2!, thereby raising the same and causing the rod 25 and fingers II to descend and thus free the loaf.
• the fingers I! remain down until the raised portion 26 of cam l9 has passed the roller 2i, whereupon a torsion spring 21 on shaft l8 raises the fingers I'l into position to arrest the following loaf.
• the loaf thus freed slides along chute l0 into the path of one of the flights 28 carried by the double conveyor chains 29 and traveling in longitudinal slots on the bottom of the chute ill.
• the conveyor 29 is driven at a predetermined speed by means of the double cam 34 having in one of its faces a cam groove receiving a cam roller 35 of an army 36 integral with the slotted arm 31.
• a link 38 is connected to the arm 31 by a pin set in a block fastened in the slot of arm 31, and pivotally connected to arm 39 of the gear segment 40, the block being adjustable in the slot of the arm 31 to regulate the amplitude of the oscillating motion imparted to gear segment 40.
• loosely with ment 40 meshes 'with a mounted on shaft 32 (Fig. 2) and provided an integral arm 42 whichcarries a stud 43 on which is pivoted a pawl 44 engaging with a tooth 45 of ratchet 46 keyed on shaft 32.
• the loaf is advanced rapidly a distance corresponding to the space between the loaves on conveyor 29 until the loaf engages the knives of the slicer, the amplitude of the oscillation of segment 40 being regulated to produce the required extent of motion for loaves of varying size.
• the tooth 45 is thus advanced under the second. pawl 41 (Fig. 2) which engages the tooth and drives the ratchet and conveyor at a slower speed while the loaf is being advanced through the slicer unit.
• While propelling the loaves the flights 28 of conveyor 29 are held in an upright position by means of rollers 58 carried by the flights 28 and riding on the top of a cam rail 59 supported on shafts 32 and 33.
• rollers 58 When the rollers 58 reach the end of rail 59 they follow the track 60 which allows the flights gradually to descend from the loaf, and the loaf is thus halted in the slicer unit 6
• the loaves on entering the slicer unit pass beneath a top tension guide 620:.
• the slicer unit BI is of the conventional type, and is mounted on tie bars 62 connecting the side frames ll of the machine.
• the slicer unit is driven by means of 'a motor 63 driving a chain 64 running over a sprocket 65 and a sprocket 66 attached to the crank shaft 67 of the slicer.
• the slicing knives are disposed in slots in the bottom of the chute l0 and supported on knife frames connected to the crank shaft 61. Further description of the mountingof the knife frames and their connections to the crank shaft is deemed unnecessary since the same is conventional.
• the loaf after having been sliced enters between side guides 68 which are attached to rods 69 slidable in the lugs 10 of brackets H connected by a table, and locked in position by set screws 12 to hold the slices of the loaf together.
• the sliced loaves drop onto the table supported by the brackets l l, the loaves being advanced on the table by a conveyor I3 having pushers 14 which travel through slots Segment 53' in the table and deliver the loaves to the runway 15 of a wrapping machine.
• the loaves Upon entering the runway 15 the loaves enter between flights 1B of an endless conveyor (not shown) which clamp the loaf by its ends and propel the same to the wrapper applying station of the wrapping machine.
• the conveyor 13 is driven from the cam shaft 20 by means of a sprocket ll driving a chain T8 running over a sprocket 19 mounted on a shaft 85 supported in brackets 8
• the shaft carries a pair of sprockets 82 driving conveyor chains 13 over idler sprockets 83.
• On the shaft 80 are pivoted the brackets ll one of which is equipped with a. stud and lock nut 84 engaging in the elongated slot 85 of bracketBl. With this arrangement, the brackets H can be raised or lowered to the level of the runway of the wrapping machine and when properly located, locked in position by nut 84.
• the cam shaft 20 is provided with a sprocket 8B which is driven by means of a chain 81 from the main drive of the wrapping machine.
• the adjustment of the block by which link 38 is secured to arm 31 to regulate the amplitude of the loaf forwarding stroke of the chain flight 28 is important because it permits the slicing of narrow loaves to occupy the same proportion of the machine cycle that the slicing of the wide loaves does.
• the value of this lies in the fact .that most of the production in bakeries is on relatively narrow loaves and it is on these loaves which are commonly sliced while soft and hot, that a slow advance resulting in the highest quality of slicing is desired.
• a chute adapted to receive a single file of loaves of bread, of a slicer unit, and cam-actuated means for separating loaves from said file and advancing them to said slicer unit at a relatively high speed and advancing them through the slicer unit at a relatively low speed
• the bottom of said chute being provided with longitudinal slots
• said means including conveyor chains provided with flights arranged to travel through said slots, driven and idler sprockets over which said chains are trained, escapement means adapted to arrest the leading loaf in said file and then release the same to permit it to slide down said chute into the path'of said flights, and mechanism for driving said driven sprockets at a relatively high speed and then at a relatively low speed.
• a chute adapted to receive a single file of loaves of bread, of a slicer unit, and means for separating loaves from said file and advancing them to said slicerunit at a relatively high speed and advancing them through the slicer unit at a rela tively low speed
• the bottom of said chute being provided with longitudinal slots
• said means including conveyor chains provided with flights means for varying the amplitude of the high I speed and low speed motions of said driven sprockets in order to bring loaves of different sizes into engagement with the slicer unit at high speed and advance them clear of the slicer unit at low speed.
• said means including conveyor chains provided with flights adapted to pushthe loaves, driven and idler sprockets over which said chain's are trained, mechanism for driving the driven sprockets at a relatively high speed and then at relatively low speed, and adjusting means for varying the amplitude of the high speed and low speed motions of the driven sprockets in order to bring loaves of different sizes into engagement with the slicer unit at high speed and advance them clear of the slicer unit at low speed.
• Cam-actuated means for advancing loaves at a relatively high speed and then at a relatively low speed comprising conveyor chains provided with flights adapted to push the loaves, driven and idler sprockets over which said chains are trained, and mechanism for driving the driven sprockets at a constant relatively high speed and then at a constant relatively low speed.
• Means for advancing loaves at a relatively high speed and then at a relatively low speed comprising conveyor chains provided with flights adapted to push the 'loaves, driven and idler sprockets over which said chains are trained, and mechanism for driving the driven sprockets at a relatively high speed and then at a relatively low speed, said mechanism including a shaft to which said driven sprockets are fast, a ratchet fast to said shaft, arms loosely mounted on said shaft, spring-pawls mounted on said arms to engage the teeth of said ratchet, and means for vibrating said arms to cause said pawls successively to engage the teeth of said ratchet and drive said shaft at alternately different speeds.
• Means for advancing loaves at a relatively high speed and then at a relatively low speed comprising conveyor chains provided with flights adapted to push the loaves, driven and idler sprockets over which said chains are trained, and mechanism for driving the driven sprockets at a relatively high speed and then at a relatively low speed, said mechanism including a shaft to which said driven sprockets are fast, a ratchet fast to said shaft, arms loosely mounted on said shaft, spring-pawls mounted on said arms to engage the teeth of said ratchet, means for vibrating said arms to cause said pawls successively to engage the teeth of said ratchet and drive said shaft at alternately different speeds, and adjusting means for varying the amplitude of the vibratory motion of said arms.
• a slicer unit having a plurality of spaced knives,mechanism for advancing a series of loaves along a runway to said knives, comprising a conveyor having spaced loaf forwarding flights, driving connections for imparting a relatively high speed to the flights during a part of each cycle of the machine for feeding'loaves in front of and adjacent said knives, and for moving said flights at a relatively low speed for the remainder of the cycle to advance said loaves through said knives, and means for adjusting said connections for varying the distance traveled by said flights at said high and low speed in accordance with the width of the loaves of the series to be sliced.
• a slicing unit having a plurality of spaced knives, of mechanism for feeding a row of loaves along a runway and for separating the loaves seriatim from said row and depositing each loaf so separated in front of and adjacent to said knives, said mechanism including, a loaf forwarding member, means for moving said member to advance each succeeding separated loaf against each immediately preceding separated loaf to push the latter through said knives, and devices for adjusting said means to vary the amount of movement to be imparted to said feeding mechanism in accordance with the with of the loaves to be sliced.
• a bread slicing machine the combination with a slicer; means to receive and to feed towards said slicer, a row of loaves in constantly upright, contacting, side by side relation; mechanism for pushing positively through said slicer, in continuous series at all times, a plurality of loaves from said row in contacting, upright, side by side relation; means to advance from said slicer each completely sliced loaf; said flrstnamed feeding means operating to advance intermittently from said row each leading loaf thereof, thereby replenishing recurrently the quantum of loaves being so pushed in continuous series through said slicer, said means for advancing each completely sliced loaf including, a delivery conveyor provided with spaced flights adapted to receive sliced loaves sidewise therebetween from said slicer and transport them sidewise to a wrapping machine, said mechanism for intermittently advancing upright loaves sidewise through said slicer acting to deliver them sidewise between the flights of said conveyor, and means for driving said delivery conveyor in coordinated relation with said intermittent feed of the pushers.

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• Life Sciences & Earth Sciences (AREA)
• Forests & Forestry (AREA)
• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Manufacture Of Wood Veneers (AREA)

Description

Priority Applications (1)

Applications Claiming Priority (1)

Publications (1)

Family

ID=25025915

Family Applications (1)

Country Status (1)

• 1934
  • 1934-11-09 US US752344A patent/US2141947A/en not_active Expired - Lifetime

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