EP0441871A1 - A sheet feeding apparatus - Google Patents
A sheet feeding apparatusInfo
- Publication number
- EP0441871A1 EP0441871A1 EP89912795A EP89912795A EP0441871A1 EP 0441871 A1 EP0441871 A1 EP 0441871A1 EP 89912795 A EP89912795 A EP 89912795A EP 89912795 A EP89912795 A EP 89912795A EP 0441871 A1 EP0441871 A1 EP 0441871A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet
- feed
- set forth
- feeding apparatus
- sheet feeding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
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- 230000001133 acceleration Effects 0.000 claims description 18
- 238000005192 partition Methods 0.000 claims description 8
- 238000012546 transfer Methods 0.000 abstract description 19
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 239000011087 paperboard Substances 0.000 description 15
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000007795 chemical reaction product Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000009849 deactivation Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 241000139306 Platt Species 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/001—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof by chemical synthesis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/02—Separating articles from piles using friction forces between articles and separator
- B65H3/06—Rollers or like rotary separators
- B65H3/0607—Rollers or like rotary separators cooperating with means for automatically separating the pile from roller or rotary separator after a separation step
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/02—Separating articles from piles using friction forces between articles and separator
- B65H3/06—Rollers or like rotary separators
- B65H3/063—Rollers or like rotary separators separating from the bottom of pile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H3/00—Separating articles from piles
- B65H3/02—Separating articles from piles using friction forces between articles and separator
- B65H3/06—Rollers or like rotary separators
- B65H3/0692—Vacuum assisted separator rollers
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/46—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates
- C07K14/47—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans from vertebrates from mammals
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/435—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from animals; from humans
- C07K14/78—Connective tissue peptides, e.g. collagen, elastin, laminin, fibronectin, vitronectin or cold insoluble globulin [CIG]
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2406/00—Means using fluid
- B65H2406/30—Suction means
Definitions
- This invention relates to apparatus for feeding paperboard sheets, and particularly corrugated paperboard sheets, to sheet-handling apparatus.
- This feeding apparatus can also be used to feed solid fiber or non-corrugated sheets.
- Corrugated paperboard typically comprises a laminate of several layers of thin paperboard.
- the internal layer or layers of the paperboard are corrugated, i.e., comprised of paperboard which has parallel and alternating grooves therein. While these grooves lend strength to the cardboard without adding excess weight, they are susceptible to being crushed when excess force is applied to the sheet.
- Corrugated paperboard is manufactured in a paper-making plant and is then typically shipped as large flat sheets or "blanks" to box manufacturers who use the paperboard sheets to form boxes.
- the box manufacturer typically has machinery for printing desired information on the sheet and for forming the sheet into a flattened box ready for shipment to the customer, who then purchases the flattened boxes for later assembly and packaging of the customers product.
- Sheet feeders are used in these industries where it is desirable to feed paperboard sheets to machinery for subse ⁇ quent treatment thereof.
- Such sheet feeders are commonly used in the box-making industry, at the very beginning of the box manufacturing process, to feed corrugated paperboard sheets to an entire manufacturing line of machinery, which follows the sheet feeder, for treating the sheet.
- This machinery may comprise a variety of known sheet treatment machines for example a rotary die cutter or flexo-folder-gluer.
- One common example of a manufacturing line for treating corrugated cardboard sheets includes a series of print and impression cylinders which provide printed matter on the sheet. These cylinders are commonly followed by a siotter which provides cuts in the sheet at which the sheet may be later folded for assembly into a box. The siotter may be followed by a gluer which provides adhesive on selected areas of the sheet so that when the sheet is later assembled into a box, selected areas of the sheet are adhered to one another.
- Sheet feeders of conventional design for timely feeding paperboard sheets to sheet-handling apparatus use vacuum assisted feeding elements such as suction cups, belts or wheels to transfer the sheet from a stack of sheets to a pair of heavy weight feed rolls or cylinders. The sheet is transferred by the feed rolls to the subsequent sheet- handling apparatus of the manufacturing line.
- vacuum assisted feeding elements such as suction cups, belts or wheels to transfer the sheet from a stack of sheets to a pair of heavy weight feed rolls or cylinders. The sheet is transferred by the feed rolls to the subsequent sheet- handling apparatus of the manufacturing line.
- U.S. Patent No. 4,236,708 to Matsuo Another example of a prior art sheet feeder which has attempted to overcome the crushing problems associated with feed rolls is described in U.S. Patent No. 4,236,708 to Matsuo.
- the sheet feeder of this patent employs two sets of vacuum assisted conveyor belts to feed corrugated cardboard sheets to a die cutter. Each set of belts is arranged along the sheet feeder in a longitudinal direction to the direction of travel of the sheet. The first set of belts advances the sheet from rest up to line speed of the subsequent sheet handling machinery. The first set of belts then feeds the sheet to the second set of belts which is traveling at line speed.
- the Matsuo patent although avoiding the problems associated with feed rolls, has several disadvantages.
- the speed between the two sets of belts is matched for only an instant during the period when the sheet is fed from the first set of belts to the second. Therefore, for some finite time, the sheet is under the control of at least two belts which are not traveling at a matched speed.
- This unequal rate of speed between the two belts does not produce a smooth, continuous transfer of the sheet.
- an unequal rate of speed can cause the belts to lose control of the sheet which would not be acceptable for heavyweight corrugated sheets.
- Lack of a smooth transfer and loss of control of the sheet by the feed belts can cause the sheet to be fed out of sequence to the subsequent sheet handling machinery. Feeding out of sequence or misfeeding, as discussed above, is known to result in an inferior, non-uniform end product.
- the vacuum area of the Matsuo sheet feeder is not constant during the time when the sheet is in transi- tion between the belt sets.
- the sheet may not remain in contact with the belts during the transfer.
- this too can cause a loss of control of the sheet which can cause the sheet to be fed out of sequence to the subsequent sheet handling machinery, resulting in an inferior, non-uniform end product.
- the present invention overcomes the problems and deficiencies discussed above by providing a sheet-feeding apparatus capable of feeding corrugated sheets without the need for feed rolls.
- the apparatus comprises a support for a sheet having a first plurality of feed elements driven at a variable speed and second plurality of feed elements driven at a constant speed.
- the feed elements are preferably arranged in transverse rows.
- the feed elements preferably comprise feed wheels.
- variable speed feed elements are driven by a variable-speed generating mechanism.
- the variable-speed generating mechanism generates a motion cycle which preferably comprises an acceleration segment, a constant-speed output segment, and a deceleration segment.
- the constant-speed output segment is substantially equal to the constant speed of the constant speed feed elements.
- the variable-speed generating mechanism may comprise a driver element and a driven element, both having geared portions which intermesh to create the constant-speed output segment.
- the constant-speed output segment of the variable- speed generating mechanism may begin before the leading edge of the sheet contacts the variable-speed feed elements, and may be maintained until the trailing edge of the sheet has contacted the constant-speed feed element closest to the variable speed feed elements.
- the deceleration segment may begin.
- the deceleration segment may be created by the driver element including a roller which is received in a slot of the driven element.
- An output gate may be provided above the variable speed feed elements to define a gap for limiting the number of sheets transferred at one time by the feed elements to the delivery end.
- a vacuum chamber may be provided adjacent the feed elements for creating a constant vacuum pressure which maintains the sheet in contact with the feed elements at all times during sheet transfer.
- the vacuum chamber may include vacuum partitions for allowing vacuum pressure to be provided adjacent selected feed elements.
- a clearing mechanism may be provided adjacent the variable speed feed elements.
- the clearing mechanism may comprise a lowering mechanism, an actuator, and a clearing cam. Interaction between the clearing cam and actuator causes the lowering mechanism to move vertically and selectively prevent the sheet from contacting the feed elements.
- the sheet feeding apparatus provides a smooth, continuous controlled transfer of a sheet, a corrugated sheet in particular, from one end of the feed apparatus to the other. Due to the absence of feed rolls, the sheet is fed without crushing the corrugations.
- the sheet remains under the control of a plurality of feed elements traveling at matched speed, which allows improved control of the sheet throughout sheet transfer. Maintaining the constant speed output segment of the variable speed feed elements until the sheet has been transferred to the control of the constant speed feed elements provides accurate feeding of the sheet to subsequent sheet- handling apparatus. As each successive feed element row assumes control of the leading edge of the sheet, a feed element row at the trailing edge of the sheet relinquishes control. This provides a smooth, continuous controlled transfer of the sheet as it is fed by the feeding apparatus.
- Figure 1 shows a top plan view, with sections cut away, of a sheet feeder embodying the principles of the present invention
- Figure 2 is cross sections of the sheet feeder taken along line 2-2 in Figure 1;
- Figure 3 is a diagram showing the relationship between output velocity and machine rotation during a single-feed operation of the present invention
- Figure 4 is a diagram showing the relationship between output velocity and machine rotation during a double-feed operation of the present invention
- Figure 5 is a side elevation of a variable speed generating mechanism for the sheet feeder of Figure 1;
- Figure 6 is a cross section of the sheet feeder taken along line 6-6 of Figure 1 with the clearing mechanism in the high position
- Figure 7 is a cross section of the sheet feeder taken along line 7-7 of Figure 1 with the clearing mechanism in the low position;
- Figure 8 is a cross section taken along line 8-8 in Figure 1;
- Figure 9 is a cross section taken along line 9-9 in Figure 8;
- Figure 10 is a cross section taken along line 10-10 in Figure 9.
- the present invention comprises a sheet feeder, shown generally by reference numeral 10, for feeding a paperboard sheet from a stack of sheets.
- the sheet feeder 10 is designed to transfer an individual sheet to a variety of subsequent sheet handling machinery, designated by the dotted outline box labeled M.
- Machinery M may comprise for example: a die cutter; a siotter; a folder; a gluer; print and impression cylinders; as well as any combination of the same.
- the machinery M is driven at a continuous speed which is hereinafter referred to as the line speed, but does not form a part of the present invention.
- sheet feeder 10 be as wide as machine M.
- Sheet feeder 10 of the present invention comprises a series of feed wheels 19, a drive train located in housing 44, a vacuum mechanism located within wheel box 34 underneath feed wheels 19, and a clearing mechanism, a portion of which is located within wheel box 34, which cooperate to smoothly transfer a sheet to machine M.
- Feed wheels 19 provide support for a sheet as it is transferred by sheet feeder 10, and preferably are comprised of high-friction urethane. However, other materials having a high coefficient of friction may be used as well.
- Feed wheels 19 are arranged in wheel box 34. Wheel box 34 has a feed end 38, a center portion 40, and a delivery end 42. The sides of wheel box 34 are shown generally in Figure 1 as the operator side 0 and drive side D.
- a plurality of feed wheels 19 are arranged along feed wheel shafts 21, 23, 25, 27, 29, 31 and 33.
- Shafts 21, 23, 25, 27, 29, 31 and 33 are arranged in horizontal rows within wheel box 34 from feed end 38 to delivery end 42.
- Shafts 21, 23, 25, 27, 29, 31 and 33 extend across wheel box 34 from operator side 0 to the drive side D and are transverse to the direction of travel of a sheet from feed end 38 to delivery end 42.
- Feed wheels 19 are preferably arranged so that they do not contact one another.
- shafts 21, 23, 25, 27, 29, 31 and 33 may be positioned so that wheels 19 of adjacent shafts are interleaved in order to conserve space by making the distance between feed end 38 and delivery end 42 shorter.
- FIG. 6 in which feeder 10 is shown just prior to transfer of a sheet S from stack SS to machine M, Sheet S is supported by feed wheels 19 on shafts 21, 23 and 25.
- a feed gate 14 is provided above center portion 40.
- Gate 14 is a rigid plate which extends from operator side 0 to drive side D of wheel box 34.
- Gate 14 acts as a front stop by preventing stack SS from moving toward delivery end 42.
- Sheet S has a leading edge L and a trailing edge T.
- a gap 15 is formed between the bottom of gate 14 and center portion 40. Gap 15 selectively allows only one sheet S at a time to pass from stack SS towards delivery end 42, and can be adjusted to accommodate for a variety of sheet thicknesses.
- sheet feeder 10 could alternately comprise individual belts driven by pulleys, or any other known feed element means for transferring paperboard sheets.
- the belts may be arranged similar to the wheels shown in the drawings. That is, there could be seven transverse rows of individual belts extending from feed end 38 to delivery end 42 of feeder 10. Three transverse rows of belts driven at a variable speed may be provided between feed end 38 and gate 14. One transverse row of belts driven at a variable speed may be provided between gate 14 and delivery end 42. Three transverse rows of belts driven at a constant speed may be provided between the four belts driven at a variable speed and delivery end 42 of feeder 10.
- sheet feeder 10 could comprise more or less than the number of rows shown.
- sheet feeder 10 could employ a single row of feed elements rotating at variable speed and a single row of feed elements rotating at constant speed.
- feed wheels having a continuous surface have been shown in the drawings, it is possible that feed wheels having a partially relieved surface, as in known in the art, could also be employed with the present invention.
- Drive train 43 is disposed within housing 45 preferably mounted at drive side D of wheel box 34.
- Drive train 43 comprises a variable-speed drive train shown generally at 45 and a constant-speed drive train shown generally at 46.
- constant-speed drive train 46 comprises a constant-speed drive gear 84 which rotates clockwise, to drive constant-speed pinion gears 57 and 58 provided on shafts 29 and 30, respectively. Additionally, constant-speed gear train 46 comprises a constant-speed idler gear 86 which, driven by gear 58, drives constant-speed pinion gear 59 provided on shaft 31. Rotation of constant-speed pinion gears 57, 58 and 59 by drive gear 84 and idler gear 86 causes feed wheels 19 on shafts 29, 31, and 33 to rotate. Contact between the rotating feed wheels 19 and sheet S causes sheet S to be transferred from the feed wheels 19 of shafts 21, 23, 25 and 27 to delivery end 42 of feeder 10.
- Constant-speed drive gear 84 may be driven independently of sheet feeder 10. ' However, as discussed above, it is preferable that feed wheels 19 on shafts 29, 31 and 33 are driven at the same line speed as machine M. Therefore, constant-speed drive gear 84 could be driven by machine M.
- Variable-speed drive gear 50 is driven in the motion cycle shown in Figures 3 and 4.
- Figures 3 and 4 show the relationship between the output velocity or line speed of feed elements 19 on shafts 21, 23, 25, and 27 and machine rotation of sheet feeder 10. That is, it shows the line speed of the feed wheels 19 during the time it takes for sheet feeder 10 to go through one complete feed cycle (360°).
- Figure 3 which shows a single feed operation where one sheet S is fed per machine cycle
- the motion cycle of variable-speed drive train 45 is divided into three segments A, B, and C. The first is acceleration segment A.
- acceleration segment A the speed of the feed wheels 19 on shafts 21, 23, 25, and 27 accelerates from zero velocity to 100% velocity, which is equivalent to the line speed of machine M.
- the third segment C is a non-critical segment during which the speed of feed wheels 19 on shafts 21, 23, 25 and 27 may increase or decrease without an effect on sheet S due to a clearing mechanism (Figs 6-10).
- the clearing mechanism maintains stack SS out of contact with feed wheels 19 on shafts 21, 23, 25 and 27 when it is desired that no sheet S be transferred from stack SS.
- the preferred non-critical segment C shown in dotted lines in figure 3, is generated by a mechanism which is to be discussed in greater detail below. As shown in Figure 3, the velocity at the end of segment C may, if desired, be zero.
- Figure 4 shows the relationship between output velocity of the feed elements 19 on shafts 21, 23, 25 and 27 and machine rotation (360°) of sheet feeder 10 during a double feed operation when two sheets are fed per machine rotation. That is, where the first sheet is fed when the machine rotation is at 0 ⁇ and the second sheet is fed when the machine rotation is at 180".
- the motion cycle goes through six segments A', B', C, A', B', and C.
- the third segment C is the noncritical segment for the double feed operation. Similar to non-critical segment C ( Figure 3), the output velocity of feed wheels 19 on shafts 21, 23, 25 and 27 may increase or decrease without an effect on stack SS due to the clearing mechanism ( Figures 6-10) which maintains stack SS out of contact with feed wheels 19 on shafts 21, 23, 25, and 27.
- Non-critical segment C extends until 180° of a machine rotation, at which point in the feed cycle, a second acceleration segment A', identical to the first A' begins, followed by a second identical constant-speed output segment B', which is followed by a second non-critical segment C. Both preferred non-critical segments C are shown in dotted lines in Figure 4.
- a variable-speed generating mechanism which is capable of generating the preferred motion cycles shown in Figure 3 is shown generally at 60 in Figure 5.
- This mechanism is available from Cyclo Index, a division of Leggett & Platt, Inc., Carthage, Missouri.
- Mechanism 60 for performing the single feed operation of Figure 3, is available as Part No. 6410-240-1/2.
- the preferred mechanism (not shown) for performing the double feed operation of Figure 4 is available as part No. 6420-170-1/3.
- Variable-speed generating mechanism 60 comprises a driver element 61 and a driven element 66 which cooperate to produce a variable-speed motion cycle.
- Driver element 61 comprises a geared portion 62; an acceleration roller 63; a deceleration roller 64; and a circumferential portion 65.
- Driven element 66 comprises two geared portions 67 and 68 each having teeth; four slots 70, 71, 72, and 73; and four rollers 74, 75, 76, and 77.
- segment A Figure 3
- acceleration roller 63 is disposed within slot 70 and mechanism 60 functions similar to a conventional Geneva mechanism.
- Figure 5 shows mechanism 60 during a portion of the constant-speed output segment B ( Figure 3), during which, the teeth of geared portion 62 of driver element 61 are inter- meshing with the teeth of geared portion 68 of driven element 66.
- driver element 61 continues to rotate clockwise, the teeth of geared portions 62 and 68 intermesh causing driven element 66 to rotate counterclockwise.
- This constant and continuous intermeshing of geared portions 62 and 68 causes variable-speed gear train 45 to rotate at a constant speed and thereby causes feed wheels 19 on shafts 21, 23, 25 and 27 to rotate at a constant speed.
- deceleration roller 64 on driver element 61 engages slot 77 and the deceleration segment begins (dotted line in Figure 3).
- driver 61 continues to rotate clock ⁇ wise, the only contact between driver 61 and driven element 66 is rollers 76 and 77 which roll along the surface of surface 65 of driver 61.
- Driven element 66 is in a dwell period in which it is maintained in a stationary position relative to driver element 61 by rollers 74 and 75.
- deceleration of mechanism 60 occurs during the non-critical segment C.
- mechanism 60 provides a dwell period, it is not critical to the present invention that a dwell period be a part of the motion cycle.
- variable-speed generating mechanism 60 shown in Figure 5 can be used to rotate the variable-speed drive gear 50 ( Figure 2). While this is the preferred mechanism for generating the required motion cycle shown in Figure 3, the present invention may be practiced with a variety of other conventional mechanisms which are capable of generating the desired variable speed motion cycle. Examples of such alternative variable-speed generating mechanisms which are capable of generating the required segments A and B include: a conventional indexing mechanism with a conven ⁇ tional differential; a conventional Geneva drive with a conventional differential; a five-bar dwell mechanism with a conventional differential; and a variable-speed motor. Furthermore, although driven element 66 of mechanism 60 only achieves 1/2 a revolution per one revolution of driver
- this ratio is not essential to the present invention.
- variable-speed drive gear 50 in a double feed operation would comprise a drive gear having two identical geared portions and rollers. Geared portions similar to portion 62 would, however, include fewer teeth than portion 62 shown in Figure 5, and rollers 63 and 64 would be approxi ⁇ mately 90 c apart.
- the vacuum mechanism maintains sheet S in constant contact with feed wheels 19 while sheet S is being transferred from feed end 38 to delivery end 42 of sheet feeder 10.
- the vacuum mechanism more particularly comprises a vacuum chamber 94 located within wheel box 34 underneath feed wheels 19.
- Vacuum chamber 94 further includes alternating vacuum partitions 96 and bearing supports 98 (Fig. 1).
- Bearing supports 98 include bearing surfaces for supporting shafts 21, 23, 25, 27, 29, 31 and 33, and act as vacuum partitions.
- Vacuum chamber 94 is connected at its bottom portion to a fan (not shown) which generates a constant negative vacuum pressure shown by arrows V in Figure 7.
- Vacuum pressure V is applied to the underside of feed wheels 19 as they are supported across wheel box 34. Vacuum pressure V pulls sheet S against feed wheels 19 as sheet S is transferred along them.
- sheet feeder 10 When a sheet narrower than the width of the wheel box 34, the width being defined by the distance between operator side 0 and the drive D side, is fed by sheet feeder 10, it is possible to close off vacuum pressure V to selected areas of vacuum chamber 94 which are not contacted by sheet S.
- a baffle 16 is provided above feed elements 19 on shafts 27, 29, 31 and 33 between gate 14 and delivery end 42.
- Baffle 16 which may be a horizontal flexible plate supported by vertical support 17, extends from operator side 0 to drive side D of sheet feeder 10.
- Baffle 16 is fixed at a height just above the height of sheet S as it passes thereunder.
- Baffle 16 serves to minimize air leakage into vacuum chamber 94 which might otherwise reduce the efficiency of the vacuum mechanism.
- a single vacuum chamber 94 has been shown extending from feed end 38 to delivery end 42, individual vacuum chambers and fans could be provided for each row of feed wheels or the alternative feed elements discussed above. This would increase efficiency of the vacuum mechanism because any leakages of air associated with one chamber would not effect any of the other chambers.
- Actuator 103 comprises a push lever 114 (Figure 7), actuating lever 122 and cam follower 118 (Figure 8).
- One end of push lever 114 is in contact with.the hemispherical end of rod 108.
- the other end of push lever 114 is rigidly fixed to a clearing shaft 116.
- Each clearing shaft 116 extends from housing 136 on operator side 0 to drive side D of feeder 10.
- Cam follower 118 is rotatably attached to actuating lever 122 by a cam follower pin 120.
- cams 126 are provided in housing 130.
- One cam 126 is provided for each row of feed wheels 19 on shafts 21, 23, 25 and 27.
- Cams 126 are disposed on cam shaft 127 which rotates at a constant angular speed preferably equal to the constant angular speed of driver 61 ( Figure 5). If an alternative variable-speed mechanism is selected to drive the variable-speed feed elements 19 of shafts 21, 23, 25 and 27, it is preferred that cams 126 be at a 1:1 ratio with the output element of the mechanism.
- Each cam 126 has a profile including a relieved surface 125 and a non-relieved surface 129 ( Figure 8).
- Each cam follower 118 follows the profile of its associated clearing cam 126.
- a compression spring 117 is provided on rod 108 to provide a downward force on clearing shaft 116 to help ensure constant contact between each cam follower 118 and its associated clearing cam 126.
- Housing 130 preferably comprises the sheet feeder inner frame 132, a bottom plate 134, an end plate 136, and a top plate 138.
- Inner frame 132 provides a bearing surface 133 which supports clearing shafts 116, and a bearing surface 135 (shown in phantom in Figure 9)which supports clearing cam shaft 127.
- a drive means DM for driving shaft 127 is shown in dotted outline in Figure 9. Alternatively, shaft 127 may extend to drive side D of feeder 10 and may be driven by drive train 43.
- the end plate 136 of housing 103 also provides a bearing support 137 (shown in phantom) for clearing cam shaft 127.
- end plate 136 provides apertures 140 for supporting interrupter mechanisms shown generally at 128.
- One interrupter 128 is provided for each actuator 122.
- Each interrupter 128 acts as a latch by maintaining the clearing mechanism in the up position.
- Each interrupter 128 preferably comprises a double-acting air cylinder 142 which cooperates with an actuating lever 122.
- Air cylinder 142 includes an operator-selectable switch (not shown) which causes pressurized air supplied to air cylinder 142 to extend the tapered end 144 of air cylinder 142. When tapered end 144 is extended, it is received within a " tapered hole 124 on actuating lever 122 ( Figure 8).
- Tapered end 144 and tapered hole 124 are in alignment only when roller 118 is on surface 129 of cam 126; therefore, interrupter 128 should only be activated when roller 118 is on raised surface 129 of cams 126.
- the presence of tapered end 144 within tapered hole 124 slightly raises actuating lever 122 and prevents it from further pivoting which prevents rod 108 from moving vertical ⁇ ly.
- the operator-selectable switch is activated in the opposite direction causing tapered end 144 to retract from tapered hole 124.
- deactivation is accomplished when roller 118 is in contact with surface 129 of cam 126. Once deactivated, actuator 122 is allowed to pivot freely and therefore rod 108 is again allowed to move vertically.
- lowering mechanisms 102 are provided along each shaft 21, 23, 25, and 27.
- An individual actuator 122, clearing cam 126 and interrupter 128 is provided for each shaft 21, 23, 25 and 27.
- Each clearing cam 126 has a cam profile which raises the lowering mechanisms for each row into the up position when trailing edge T of sheet S has been transferred to the next subsequent row of feed wheels 19.
- the cams may lower all of the rods 108 in unison.
- rods 108 associated with feed elements 19 of shafts 21, 23 and 27 could lower in unison before rods 108 for shaft 29 are lowered. This would be useful if sheet S is particularly long.
- any conventional clearing mechanism which is capable of changing the relationship of stack SS and feed elements 19 would be suitable for incorporation with the present inven ⁇ tion.
- a clearing mechanism which lowers the feed wheels or elements, feed wheels having a relieved surface as discussed above; and an outer shell rotatably mounted over the sheet support which blocks contact of the feed elements with the sheet could alternatively be used.
- Sheet S is now under the control of the feed wheels 19 on shafts 21, 23, and 25, rotating at identical or matched speed.
- Lead edge L of sheet S then passes under gate 14 and through gap 15.
- lowering mechanism 102 for shaft 21 is raised to the up position.
- sheet S has reached 100% line speed.
- lowering mechanism 102 for shaft 29 is raised to the up position.
- lowering mechanism 102 for shaft 25 is raised to the up position.
- lowering mechanism 102 for shaft 27 is raised to the up position.
- Constant-speed output segment B has begun ( Figure 3) and is maintained until lead edge L of sheet S has contacted feed wheels 19 on shaft 33, or until sheet S is contacting the minimum number of rows of constant-speed feed wheels 19 necessary to control sheet S. In the preferred embodiment this minimum number is preferable three.
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- Biochemistry (AREA)
- Biophysics (AREA)
- General Health & Medical Sciences (AREA)
- Proteomics, Peptides & Aminoacids (AREA)
- Engineering & Computer Science (AREA)
- Molecular Biology (AREA)
- Toxicology (AREA)
- Zoology (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Un appareil d'alimentation en feuilles, (10) capable d'introduire des feuilles de carton ondulé, comprend un support pour les feuilles possédant une extrémité d'introduction (38) et une extrémité de sortie (42). Le support comprend de plus des éléments d'avancement (19) comprenant au moins un élément d'avancement (21, 23, 25, 27) à vitesse variable et au moins un élément d'avancement (29, 31, 33) à vitesse constante. L'élément d'avancement à vitesse variable transfère la feuille de l'élément d'introduction vers l'élément d'avancement à vitesse constante. L'élément d'avancement à vitesse constante transfère la feuille de l'élément d'avancement à vitesse variable vers l'extrémité de sortie. L'élément d'avancement à vitesse variable est actionné par un mécanisme générateur (45) à vitesse variable qui génère un cycle de mouvement comprenant un segment de sortie à vitesse constante qui est égal à la vitesse constante de l'élément d'avancement à vitesse constante.A sheet feeding apparatus (10) capable of feeding sheets of corrugated cardboard comprises a support for the sheets having an insertion end (38) and an exit end (42). The support further comprises advancement elements (19) comprising at least one advancement element (21, 23, 25, 27) with variable speed and at least one advancement element (29, 31, 33) with speed constant. The variable speed feed member transfers the sheet from the feed member to the constant speed feed member. The constant speed advancing member transfers the sheet from the variable speed advancing member to the output end. The variable speed advancement element is actuated by a variable speed generator mechanism (45) which generates a movement cycle comprising a constant speed output segment which is equal to the constant speed of the advancement element at constant speed.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US26646588A | 1988-11-03 | 1988-11-03 | |
US266465 | 2002-10-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0441871A1 true EP0441871A1 (en) | 1991-08-21 |
EP0441871A4 EP0441871A4 (en) | 1991-09-11 |
Family
ID=23014695
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19890912795 Withdrawn EP0441871A4 (en) | 1988-11-03 | 1989-11-03 | A sheet feeding apparatus |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0441871A4 (en) |
JP (1) | JPH04504552A (en) |
AU (1) | AU4528589A (en) |
WO (1) | WO1990005103A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5794758A (en) * | 1996-05-24 | 1998-08-18 | Scapa Group Plc | Roller apparatus |
JPH11314785A (en) * | 1998-05-07 | 1999-11-16 | Mitsubishi Heavy Ind Ltd | Paper feeder for corrugated sheet |
ITTO980423A1 (en) * | 1998-05-19 | 1998-08-19 | Texo Srl | INTRODUCTION BENCH FOR CORRUGATED CARDBOARD SHEETS IN A PROCESSING LINE. |
CN112469648B (en) * | 2018-02-26 | 2023-02-21 | 太阳自动化股份有限公司 | Device and method for retrofitting a corrugated cardboard or cardboard sheet feeder without a feed roller |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2418186A1 (en) * | 1978-02-27 | 1979-09-21 | Matsuo Masaharu | PNEUMATIC LEAF FEEDING APPARATUS |
US4363478A (en) * | 1979-07-23 | 1982-12-14 | Yasuhiro Tsukasaki | Method and apparatus of feeding corrugated boards |
EP0183361A2 (en) * | 1984-11-23 | 1986-06-04 | Prime Technology Inc. | Improvements in or relating to apparatus and methods for feeding articles such as sheets or boards |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US549111A (en) * | 1895-11-05 | Dore h | ||
US4341344A (en) * | 1980-02-25 | 1982-07-27 | Russell Robert J | Automatic draft controller |
US4681311A (en) * | 1983-11-09 | 1987-07-21 | Wm. C. Staley Machinery Corporation | Intermittently protruding feeder for paperboard blanks |
GB8301928D0 (en) * | 1983-01-24 | 1983-02-23 | Nicholson B H | Process for producing polypeptides |
US4683291A (en) * | 1985-10-28 | 1987-07-28 | Scripps Clinic And Research Foundation | Platelet binding inhibitors |
US5159061A (en) * | 1986-09-29 | 1992-10-27 | Takeda Chemical Industries, Ltd. | Atrial natriuretic peptide derivative |
JPS63225399A (en) * | 1986-10-28 | 1988-09-20 | Takeda Chem Ind Ltd | Peptide derivative and production thereof |
JPS63218698A (en) * | 1986-12-10 | 1988-09-12 | アボット・ラボラトリーズ | Auricular peptide derivative |
EP0275748B1 (en) * | 1986-12-15 | 1992-08-19 | Institut National De La Sante Et De La Recherche Medicale (Inserm) | Peptide derivatives and their therapeutical use |
-
1989
- 1989-11-03 JP JP2500647A patent/JPH04504552A/en active Pending
- 1989-11-03 AU AU45285/89A patent/AU4528589A/en not_active Abandoned
- 1989-11-03 WO PCT/US1989/004912 patent/WO1990005103A1/en not_active Application Discontinuation
- 1989-11-03 EP EP19890912795 patent/EP0441871A4/en not_active Withdrawn
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2418186A1 (en) * | 1978-02-27 | 1979-09-21 | Matsuo Masaharu | PNEUMATIC LEAF FEEDING APPARATUS |
US4363478A (en) * | 1979-07-23 | 1982-12-14 | Yasuhiro Tsukasaki | Method and apparatus of feeding corrugated boards |
EP0183361A2 (en) * | 1984-11-23 | 1986-06-04 | Prime Technology Inc. | Improvements in or relating to apparatus and methods for feeding articles such as sheets or boards |
Non-Patent Citations (1)
Title |
---|
See also references of WO9005103A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP0441871A4 (en) | 1991-09-11 |
JPH04504552A (en) | 1992-08-13 |
WO1990005103A1 (en) | 1990-05-17 |
AU4528589A (en) | 1990-05-28 |
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