JP2009166989A - Feeding device - Google Patents

Abstract

A detection unit provided in a feeding device may not detect a sheet to be fed depending on the position of the leading end of the sheet and the rigidity of the sheet.
A support surface 232 for supporting a document 141 as at least one sheet and a side surface of the uppermost document 141 of the document 141 and feeding the uppermost document 141 by rotation driving. A part of the document 141 is placed in the position range L by bringing the roller 230 and the detection unit for detecting the uppermost document 141 in the position range L in the direction perpendicular to the support surface 232 and the side surface of the document 141. Provided is a feeding device provided with a sheet regulating plate 800 defined at an inner position.
[Selection] Figure 12

Description

  The present invention relates to a feeding device.

  There is a feeding device that takes in one sheet at a time when a plurality of sheets are stacked and inserted. This type of feeding apparatus is installed in various apparatuses such as a copying machine, an image forming apparatus, a facsimile machine, and a printer, and is used when continuously processing a plurality of originals or recording sheets. This type of feeding device includes a sensor that detects whether or not a document or recording paper has been supplied. When it detects that a document or recording paper has been supplied, the feeding device conveys them one by one to the separation side. As a method for detecting whether or not a document or recording paper is supplied, there is a method for detecting that a document or recording paper is supplied by providing a member that rotates when contacting the document or recording paper. For example, Patent Document 1 proposes a method for detecting the presence or absence of paper, which includes a lever that contacts the paper.

JP-A-9-118452

When separating sheets such as originals and recording sheets one by one, a method is used in which a member is brought into contact with the end portions of a plurality of sheets to align the end portions of the sheets and then fed to the separating side. ing. Using such a method, when the leading edge side of the first sheet is separated and fed, the second sheet that is in contact with the member overlaps with the trailing edge side of the first sheet. In some cases, the sheet is fed so that the leading edge of the sheet gets over the member.
The second sheet fed in an overlapping manner comes into contact with a member on the side to be separated and stops at the contacted position. If the second sheet stops at the contact position, depending on the position of the leading edge of the second sheet and the rigidity of the sheet, the detection unit provided in the feeding device may cause the second sheet The sheet may not be detected. If the sheet is not detected by the detection unit of the feeding device, the feeding device stops the operation of feeding the sheet.
As described above, the detection unit provided in the feeding device may not detect the sheet to be fed depending on the position of the leading end of the sheet and the rigidity of the sheet.

  SUMMARY An advantage of some aspects of the invention is to solve some of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A supporting surface that supports at least one sheet, a feeding roller that contacts a side surface of the uppermost sheet of the sheet, and that feeds the uppermost sheet by rotational driving, and the uppermost sheet A detection unit that detects a higher-level sheet within a range of positions in a direction perpendicular to the support surface; and a sheet regulating plate that determines a part of the sheet at a position within the range by contacting the side surface of the sheet A feeding device characterized by comprising:

  According to this configuration, the sheet regulating plate is provided that determines the position of a part of the sheet within the range by being brought into contact with the side surface of the sheet. Accordingly, it is possible to determine the position of a part of the sheet fed by the feeding roller within the range of the position perpendicular to the detectable support surface. Therefore, the probability of detecting the fed sheet is improved.

Application Example 2 The above-described feeding device, wherein the sheet regulating plate is provided on the downstream side in the feeding direction of the feeding roller.
According to this configuration, the sheet restricting plate is provided in the vicinity of a position within the range of the position in the direction perpendicular to the detectable support surface. Thereby, the position of a part of the sheet can be determined within the range of the position in the direction perpendicular to the detectable support surface. Therefore, the probability of detecting the fed sheet is improved.

[Application Example 3] The feeding device, wherein an end portion of the sheet regulating plate is bent toward the downstream side.
According to this configuration, since there is no burr on the upstream side in the feeding direction of the end portion of the sheet regulating plate, it is possible to suppress the frictional resistance when the sheet comes into contact with the end portion of the sheet regulating plate. Therefore, the load when feeding the sheet can be reduced.

[Application Example 4] The feeding device, wherein an end portion of the sheet regulating plate has a curved surface.
According to this configuration, it is possible to suppress the frictional resistance when the sheet comes into contact with the end portion of the sheet regulating plate. Therefore, it is possible to reduce the load when the sheet is conveyed.

Application Example 5 In the above-described feeding device, the sheet regulating plate moves up and down in conjunction with the feeding roller.
According to this configuration, when the feeding roller is in the upper position, it is possible to prevent the sheet and the feeding roller from coming into contact with each other, and thus it is possible to reduce the load when the sheet is conveyed.

Hereinafter, examples will be described with reference to the drawings.
<Example>
FIG. 1 is a perspective view showing the overall shape of the feeding device 100 mounted on the image reading device. As shown in FIG. 1, the feeding device 100 operates in a state where it is mounted on an image reading device 130 whose detailed illustration is omitted.

  In the middle of the feeding apparatus 100, a feeding tray 112 for loading at least one original 140 as a sheet, and a discharge tray 118 for accumulating the original 140 discharged after the image is read by the image reading apparatus 130 are stored. And are placed one on top of the other. A pair of side guides 114 and 116 are mounted near the side edge of the feed tray 112 to guide the original 140 supplied from the feed tray 112 so as not to tilt. A transport unit 320 (see FIG. 2) that transports the original 140 loaded on the feed tray 112 is accommodated in an upper case 120 disposed on the left side of the feed tray 112 in the drawing.

  The feeding device 100 having the above-described shape feeds one by one from a plurality of documents 140 stacked and loaded on the feeding tray 112 and conveys them by a conveyance unit described later. The document whose image has been read on the transport path is discharged and stored in the discharge tray 118 by the discharge unit.

  In addition, the feeding device 100 is attached to the image reading device 130 by a hinge (not shown) provided at a lower portion of the rear end thereof. Accordingly, when the image reading apparatus 130 is used as a flatbed scanner or a copying machine without using the conveyance unit 320, the whole is used as a document presser. In this case, the front end can be lifted by placing a hand on the handle 122 formed on the upper case 120.

  FIG. 2 is a perspective view showing the internal mechanism 200 accommodated in the upper case 120 of the feeding device 100 by itself. For the purpose of avoiding complicated drawing, a part of the train wheel described later with reference to FIG. 3 is omitted in FIG. Further, the feeding direction of the original 140 in the internal mechanism 200 is indicated by an arrow S in the drawing.

  The internal mechanism 200 shown in the figure includes a feeding unit 310 on the right side in the figure and a conveying unit 320 on the left side in the figure, which are integrated by a pair of frames 210 parallel to the feeding direction of the document 140. The feeding unit 310 includes a support surface 232 formed continuously on the same plane as the surface of the feed tray 112, and a feed roller 230 disposed above the support surface 232. The support surface 232 of the present embodiment is an inclined surface with respect to the horizontal plane.

  The feed roller 230 is attached to the tip of the support arm 236 and moves up and down as the support arm 236 rotates. As a result, the feed roller 230 can move between a position in contact with the originals 140 stacked on the support surface 232 and a position away from the stacked originals 140. The feeding roller 230 sends the driving force to the uppermost document 140 of the documents 140 stacked on the support surface 232 from the upper side, thereby feeding the uppermost document 140 to the left side of the drawing.

  Further, a pair of stoppers 222 protrudes from the slope 220. These stoppers 222 move forward and backward with respect to the slope 220. The state depicted in FIG. 2 is in the advanced position, and is hidden behind the slope 220 when moved to the retracted position. When the stopper 222 is in the advanced position, the stopper 222 contacts the front end of the original 140 stacked on the support surface 232 in the feeding direction, thereby aligning the front end of the original 140.

  On the other hand, the transport unit 320 includes an upper transport unit 240 disposed on the side of the upper end of the slope 220 and a lower transport unit 250 disposed at the lower left end of the internal mechanism 200. The upper transport unit 240 includes an upper transport drive roller 242 that is rotationally driven via a train wheel (not shown), and an upper transport driven roller 244 that is rotated in contact with the upper transport drive roller 242.

  The upper conveyance driving roller 242 is attached to the tip of the support arm 246 and moves up and down as the support arm 246 rotates. By this operation, the upper conveyance drive roller 242 contacts or separates from the upper conveyance driven roller 244. The upper conveyance driven roller 244 is supported by the support member 228. The support member 228 is urged upward and supported so that it can be raised and lowered.

  At the position where the upper conveyance driving roller 242 contacts the upper conveyance driven roller 244, the one original 140 is conveyed by the rotational driving of the upper conveyance driving roller 242 while sandwiching one original 140.

  The rear ends of the support arm 236 that supports the feed roller 230 and the support arm 246 that supports the upper conveyance drive roller 242 are pivotally supported by a carriage frame 290 indicated by a dotted line in the drawing. The carriage frame 290 is supported by a support member (not shown), and the relative position with respect to the entire internal mechanism 200 is fixed.

  Further, the lower conveyance unit 250 includes a lower conveyance driving roller 252 that is rotationally driven via a transmission mechanism that is not shown, and a lower conveyance driven roller 254 that is rotated in contact with the lower conveyance driving roller 252. including. However, in the lower conveyance unit 250, the lower conveyance driving roller 252 and the lower conveyance driven roller 254 are always in contact with each other.

  Furthermore, the internal mechanism 200 has a pressing portion 260 on the bottom surface. The pressing unit 260 brings the conveyed document 140 into close contact with a reading window (not shown) of the image reading device 130 on which the feeding device 100 is mounted. Furthermore, the internal mechanism 200 includes a discharge portion (not shown) that feeds the document 140 that has passed through the pressing portion 260 to the discharge tray 118 at the left end of the bottom surface, but is hidden by the support surface 232 in this drawing.

  FIG. 3 is a diagram illustrating a state in which the feeding unit 310 illustrated in FIG. 2 is viewed from different directions. As shown in FIG. 3, wheel trains 284 and 286 including a plurality of gears are formed on the right side surface of the carriage frame 290 in the drawing. The feed roller 230 and the upper transport drive roller 242 are rotationally driven in the same rotational direction, and move the document 140 in contact with them in the same feed direction or transport direction. The wheel trains 284 and 286 are commonly supplied with a rotational driving force from a transmission shaft 282 extending from the outside of the feeding path.

  Further, inside the support arm 236, an elevating gear 237 that rotates integrally with the feed roller 230 is attached to one end of the feed roller 230. The raising / lowering gear 237 meshes with a rack 239 mounted on the carriage frame 290 to raise and lower the tip of the support arm 236. The feed roller 230 and the elevating gear 237 are interlocked by a train wheel 284 and a friction clutch (not shown). The friction clutch slips at the upper and lower ends of the rack 239, and the elevating gear 237 and the rack 239 are engaged. Still in state.

  FIG. 4 is a perspective view in which the feeding device 100 includes a separation pad 410. FIG. 4 is a perspective view showing the internal mechanism 200 of FIG. 2 with a separation slope 420 and a separation pad 410. The separation slope 420 protrudes from the slope 220 toward the feeding roller 230 side. The separation pad 410 is provided on the upper conveyance drive roller 242 side of the separation slope 420.

  FIG. 5 is a cross-sectional view when the sheet pressing lever 430 provided in the feeding device 100 is at the lower position. As shown in the drawing, the sheet pressing lever 430 is provided on the downstream side of the feeding roller 230 in the feeding direction D, and is in a lower position where it contacts the separation pad 410. The sheet pressing lever 430 can apply a certain load to the surface of the sheet pressing lever 430 that contacts the separation pad 410 by the pulling force of the spring 440 as an elastic member.

  The friction coefficient between the document 140 and the separation pad 410 is larger than the friction coefficient between the documents 140 and the friction coefficient between the document 140 and the sheet pressing lever 430. Accordingly, when a plurality of documents placed on the separation pad 410 are conveyed while being loaded by the sheet pressing lever 430, the documents can be separated one by one.

  The sheet feeding device 100 is provided with a sheet regulating plate 800 to be described later, and moves up and down as the feeding roller 230 moves up and down.

  FIG. 6 is a cross-sectional view when the sheet pressing lever 430 provided in the feeding device 100 is in the upper position. FIG. 7 is a cross-sectional view showing portions of the support arm 246 and the sheet pressing lever 430 of FIG. When the support arm 246 rotates in the rotation direction R1 about the rotation axis P0, the protrusion 247 formed on the support arm 246 contacts the protrusion 431 of the sheet pressing lever 430, and the sheet pressing lever 430 is shown in FIG. As shown in FIG. 4, the upper position can be set so as not to contact the separation pad 410.

  FIG. 8 is a cross-sectional view illustrating the operation of the detection unit. FIG. 8 shows a case where no sheet regulating plate is provided. The detection unit according to the present embodiment includes a rotation shaft 710, an arm 720 that rotates about the rotation shaft 710, a contact portion 700 provided at a tip of the arm 720, and a contact (not shown). Depending on the position at which the arm 720 rotates, the contact is conducted or interrupted.

  As shown in FIG. 8, when the stacked originals 140 are supplied to the support surface 232, the end portion 701 of the contact portion 700 contacts the original document at the lowest position of the original 140, and the position of the support surface 232. It is in. At this time, it is detected that the document 140 is supplied to the support surface 232 by the contact being conducted. When the document 140 is not on the support surface 232, the end portion 701 of the contact portion 700 is located away from the support surface 232. At this time, the detection unit does not detect the document 140 because the contact is cut off.

(Comparative example)
Here, the comparative example with a present Example is demonstrated. FIG. 9 is a cross-sectional view when one document 141 is in contact with the end portion 701 of the contact portion 700. FIG. 9 shows a case where no sheet regulating plate is provided. FIG. 9 is a diagram showing a state in which the document 141 that has been fed in front of the document 141 and overlapped with the separated document (not shown) and is in contact with the stopper 222 is also fed. Only one document 141 is placed on the support surface 232, and the leading end in the feeding direction D of one document 141 is placed on the stopper 222. The feeding roller 230 and the sheet pressing lever 430 are in an upper position away from the document 141.

  9 indicates a range of positions of the support surface 232 in the vertical direction (hereinafter referred to as position range L) when the contact portion 700 of the detection unit rotates about the rotation shaft 710. When the end portion 701 is in the position range L, the contact (not shown) of the detection portion is conducted, and it is detected that the document 141 is on the support surface 232.

  The single document 141 in FIG. 9 is in a position where it passes over the stopper 222 and abuts against the sheet pressing lever 430. At this time, the document 141 is in contact with the end portion 701, but the end portion 701 is not located in the position range L. Therefore, when the document 141 is supplied to the support surface 232 in such a state, the document 141 is not detected by the detection unit.

  FIG. 10 is a cross-sectional view when one document 141 is in contact with the feeding roller 230. FIG. 10 shows a case where no sheet regulating plate is provided. FIG. 10 is a diagram illustrating a state in which the document 141 that is fed in front of the document 141 and overlaps the separated document (not shown) and is in contact with the stopper 222 is also fed. The sheet pressing lever 430 is at an upper position away from the separation pad 410. Only one document 141 is placed on the support surface 232, and the leading end of the one document 141 in the feeding direction D is located between the stopper 222, the separation pad 410 and the sheet pressing lever 430. .

  Depending on the rigidity of the document 141, the state shown in FIG. When the document 141 is supplied to the support surface 232 in such a state, the document 141 is not in contact with the end portion 701 of the contact portion 700, and thus the detection unit does not detect the document 141.

  When the sheet pressing lever 430 in FIG. 10 is in the upper position away from the separation pad 410, the feeding roller 230 in the feeding device feeds the document 141 in the direction opposite to the feeding direction D in the rotational direction R2. Rotate to. For this reason, when the document 141 comes into contact with the feeding roller 230, a force for conveying the document 141 in the direction opposite to the feeding direction D acts. Therefore, the speed at which the sheet is conveyed in the feeding direction D varies due to the upper conveyance driving roller 242 and the upper conveyance driven roller 244 in FIG.

  Next, the feeding device 100 provided with the sheet regulating plate in the present embodiment will be described. 11 is a perspective view of the feeding unit 310 and the conveying unit 320 of FIG. 2 as viewed from the back side of the upper case 120 of FIG. In this embodiment, the sheet regulating plate 800 is provided between the feeding roller 230 and the sheet pressing lever 430 and is fixed to the support arm 236 of the feeding unit 310.

  The sheet regulating plate 800 is made of, for example, a plastic plate material and has a flat surface in a direction intersecting with the support surface 232. FIG. 14A is a diagram illustrating a cross-sectional shape of the end portion 810 of the sheet regulating plate 800 of the present embodiment. As shown in FIG. 14A, the end 810 of the sheet regulating plate 800 is bent in the feeding direction D and has an L shape. By having such an end portion, since there is no burr at the end portion, it is possible to suppress an increase in frictional force when the document 141 is fed while abutting against the end portion 810, or to collide with the burr. It is possible to prevent the original 140 from being fed in the feeding direction D.

  Further, since the sheet regulating plate 800 is elastic, it can be bent in the feeding direction D when the fed document 141 comes into contact therewith. For this reason, even if the document 141 collides with the end 810, the document 141 can be fed in the feeding direction D.

  FIG. 12 is a cross-sectional view when the feeding roller 230 is in the lower position. The feed roller 230 is in a lower position where it abuts against a single document 141 placed on the support surface 232. The sheet pressing lever 430 is in a lower position where it abuts on the separation pad 410. The leading end of the document 141 is placed on the stopper 222 and is in contact with the sheet pressing lever 430.

  The end portion 810 of the sheet regulating plate 800 and the feeding roller 230 abut on the document 141, so that a part of the document 141 can be positioned within the range L of the position with respect to the support surface 232. Then, since the document 141 comes into contact with the contact portion 700 of the detection unit, the document 141 rotates clockwise about the rotation shaft 710. As a result, the end portion 701 becomes a position within the position range L, so that the contact of the detection portion becomes conductive and the document 141 can be detected.

  FIG. 13 is a cross-sectional view when the feeding roller 230 is in the upper position. Only one document 141 is placed on the support surface 232, and the leading end of one document 141 in the feeding direction D is at a position that passes between the stopper 222, the separation pad 410, and the sheet pressing lever 430. .

  The end portion 810 of the sheet regulating plate 800 abuts on the document 141, so that a part of the document 141 can be positioned within the position range L with respect to the support surface 232. Then, since the document 141 comes into contact with the contact portion 700 of the detection unit, the document 141 rotates clockwise about the rotation shaft 710. As a result, the end portion 701 becomes a position within the position range L, so that the contact of the detection portion becomes conductive and the document 141 can be detected.

  The sheet regulating plate 800 can be set to an upper position and a lower position in conjunction with an operation in which the feeding roller 230 moves up and down between an upper position and a lower position.

  Further, since the end portion 810 of the sheet regulating plate 800 abuts on the original 141, the original 141 does not abut on the feeding roller 230, and thus a force for conveying the original 141 in the direction opposite to the feeding direction D. Does not work. Therefore, it is possible to suppress fluctuations in the speed of conveyance in the feeding direction D by the upper conveyance driving roller 242 and the upper conveyance driven roller 244 in FIG.

  In this embodiment, the case where only one document 141 is supplied has been described. However, in the state where the leading ends of a plurality of documents before being separated by the separation pad 410 and the sheet pressing lever 430 are on the stopper 222. In addition, the original can be detected by bringing a part of the plurality of originals into contact with the sheet regulating plate 800.

FIGS. 14B and 14C are views showing the cross-sectional shape of the end portion of the sheet regulating plate. In this embodiment, the cross-sectional shape of the end portion 810 is L-shaped, but as shown in FIG. 14B, the end portion 810a of the sheet regulating plate 800a is bent in the feeding direction D. It may be a shape. Further, as shown in FIG. 14C, the end portion 810 b of the sheet regulating plate 800 b may have a U shape that is bent in the direction opposite to the feeding direction D.
In this way, since there is no burr at the end of the sheet regulating plate, it is possible to reduce the frictional force generated when the document 141 abuts against the end.

  As described above, the feeding apparatus 100 according to the embodiment is in contact with the support surface 232 that supports the document 140 as at least one sheet and the side surface of the uppermost document of the document 140, and is rotated and driven to By abutting the feeding roller 230 that feeds the upper document 141, the detection unit that detects the uppermost document 141 in a range L in the direction perpendicular to the support surface 232, and the side surface of the document 141, A sheet restricting plate 800 that defines a part of the document 141 at a position within the position range L is provided.

  According to this configuration, the sheet regulating plate 800 is provided that determines the position of a part of the document 141 within the position range L by contacting the side surface of the document 141. Accordingly, the position of a part of the document 141 can be determined within the range L of the position in the direction perpendicular to the support surface 232 that can be detected. Therefore, the probability of detecting the supplied document 141 is improved.

Further, the sheet regulating plate 800 is provided on the downstream side in the feeding direction D of the feeding roller 230.
According to this configuration, the sheet regulating plate 800 is provided in the vicinity of a position within the range L of the position in the direction perpendicular to the support surface 232 that can be detected by the detection unit. Thereby, the position of a part of the document 141 can be set within the range L of the position that can be detected by the detection unit. Therefore, the probability of detecting the fed document 141 is improved.

Further, the end 810 of the sheet regulating plate 800 is bent downstream in the feeding direction D.
According to this configuration, since there is no burr on the upstream side in the feeding direction D of the end portion 810 of the sheet regulating plate 800, the frictional resistance when the document 141 comes into contact with the end portion 810 of the sheet regulating plate 800 is suppressed. be able to. Therefore, the load when feeding the document 141 can be reduced.

Further, the end portion of the sheet regulating plate 800 has a curved surface.
According to this configuration, it is possible to suppress the frictional resistance when the document 141 comes into contact with the end portion 810 of the sheet regulating plate 800. Therefore, the load when feeding the sheet can be reduced.

  Further, the sheet regulating plate 800 can be moved up and down in conjunction with the feeding roller 230. According to this configuration, when the feeding roller is in the upper position, it is possible to prevent the sheet and the feeding roller from coming into contact with each other, and thus it is possible to reduce the load when feeding the sheet. Further, even if the feeding roller is reversed, a force in the direction opposite to the conveyance direction does not act on the document 141.

  The detection unit of the present embodiment is configured such that the abutting portion 700 that abuts on the document 141 rotates about the rotation shaft 710. However, the document 141 blocks the light beam using a phototransistor or the like that receives the irradiated light beam. It may be a detection unit that detects whether or not to do so.

  In this embodiment, the sheet regulating plate 800 is provided on the downstream side in the feeding direction D of the feeding roller 230, but may be provided on the upstream side in the feeding direction D of the feeding roller 230.

FIG. 3 is a perspective view showing the overall shape of a feeding device mounted on the image reading device. The perspective view which extracted the internal mechanism of the feeder. The figure which shows a mode that the feeding part was seen from the different direction. The perspective view which provided the separation pad in the feeding apparatus. FIG. 4 is a cross-sectional view when a sheet pressing lever provided in the feeding device is in a lower position. FIG. 6 is a cross-sectional view when a sheet pressing lever provided in the feeding device is in an upper position. Sectional drawing which shows the part of a support arm and a sheet | seat presser lever. Sectional drawing explaining operation | movement of a detection part. FIG. 4 is a cross-sectional view when a document is in contact with a contact portion of a detection unit. FIG. 4 is a cross-sectional view when a document is in contact with a feeding roller. The perspective view which looked at the feeding part and the conveyance part from the back side of the upper case. Sectional drawing of the feeding part provided with the sheet | seat control board, and a support surface. Sectional drawing of the feeding part provided with the sheet | seat control board, and a support surface. (A), (b), (c) is a figure which shows the cross-sectional shape of the edge part of a sheet | seat control board.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 100 ... Feeding device, 140 ... Multiple documents, 141 ... Single document, 230 ... Feeding roller, 232 ... Support surface, 800 ... Sheet regulating plate, 810 ... End of sheet regulating plate, 700 ... Detection unit The abutting portion constituting the detecting portion, 710... Rotating shaft constituting the detecting portion, D... Feeding direction, L.

Claims (5)

A support surface for supporting at least one sheet;
A feeding roller that abuts against a side surface of the uppermost sheet of the sheet and feeds the uppermost sheet by rotational driving;
A detection unit that detects the uppermost sheet in a range of positions in a direction perpendicular to the support surface;
A sheet feeding device, comprising: a sheet regulating plate that defines a part of the sheet at a position within the range by contacting the side surface of the sheet. The feeding device according to claim 1,
The sheet feeding device according to claim 1, wherein the sheet regulating plate is provided on the downstream side in the feeding direction of the feeding roller. The feeding device according to claim 1 or 2, wherein
An end portion of the sheet regulating plate is bent toward the downstream side. A feeding device according to any one of claims 1 to 3,
An end portion of the sheet regulating plate has a curved surface. A feeding device according to any one of claims 1 to 4, wherein
The sheet regulating plate is moved up and down in conjunction with the feeding roller.

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