JP2019099320A - Printer - Google Patents

Abstract

To provide a printer adapted to easily determine an insertion position of an insertion sheet by a simple structure while suppressing the consumption of consumable supplies.SOLUTION: A printer (stencil printer ) comprises: a first roller (pickup roller 22) that transports a sheet P; a second roller (secondary paper feeding roller 26) that is arranged downstream of the first roller with respect to a transport direction D of the sheet P and transports the sheet P; driving means (first drive motor M1 and second drive motor M2) that drives at least one of the first roller and the second roller; and a control section that controls the driving means to form a fold P0b in the sheet by inserting a sheet (insertion sheet P0) that is in a state of being loosened between the first roller and the second roller at one time into the second roller on both sides of a looseness P0a with respect to the transport direction D.SELECTED DRAWING: Figure 6B

Description

  The present invention relates to a printing apparatus.

  Heretofore, in a printing apparatus, in order to facilitate sorting of printed sheets, insertion of a slip sheet (slip sheet) dedicated for sorting, insertion of a paper tape, stapling, or the like is performed. There is also known a method of sorting by simply inserting a blank sheet as an interleaf or printing on this interleaf.

  As a technique for sorting, two sheets of paper for interleaf are used, the paper is conveyed so that the first and second interleaf sheets are shifted and overlapped, and further, a mechanism for fixing the paper is used 2 An image forming apparatus has been proposed which performs sorting by bonding sheets of interleaf (see, for example, Patent Document 1).

  Further, a discharge device of a copying machine has been proposed in which the copy paper is creased between the paper discharge rollers by lifting the copy paper end by the variable guide plate (see, for example, Patent Document 2).

JP, 2010-181639, A Japanese Utility Model Publication No. 61-122255

  However, the above-mentioned insertion of special-purpose paper for sorting, insertion of paper tape, stapling, etc. requires the installation of a dedicated mechanism, resulting in a complicated structure. In addition, the use of consumables such as paper tape and staples is disadvantageous in cost.

  As described above, in an image forming apparatus that performs sorting by bonding two sheets of paper, a mechanism for fixing each sheet is essential, and consumption of consumables is increased by using two sheets of paper. Costs money.

  Further, in the discharge device for lifting the copy paper end by the variable guide plate as described above, the variable guide plate and the solenoid for moving the variable guide plate are required, thereby complicating the configuration.

  In addition, as described above, in the method of sorting by simply inserting a blank sheet as the interleaving paper or printing on the interleaving paper, the interleaving paper is buried in the printed matter where the interleaving paper is. It is difficult for the user to determine if it is inserted.

  An object of the present invention is to provide a printing apparatus capable of easily determining the insertion position of a slip sheet while suppressing consumption of consumables by a simple configuration.

  In one aspect, the printing apparatus includes a first roller for conveying a sheet, a second roller disposed downstream of the first roller in the sheet conveyance direction, and for conveying the sheet; And a driving unit for driving at least one of the second roller and the second roller, and the conveying direction in which the sheet in a state of being slackened between the first roller and the second roller is interposed between the slack And a control unit configured to control the drive unit so as to form a fold on the sheet by inserting the second roller collectively on both sides of the sheet.

  According to the aspect, it is possible to easily determine the insertion position of the slip sheet while suppressing consumption of consumables by a simple configuration.

It is a block diagram which shows a stencil printing apparatus. It is a figure which shows typically the paper feeding part of a stencil printing apparatus. FIG. 6 is a block diagram for explaining a control configuration of a sheet feeding unit. 5 is a timing chart for explaining a sheet feeding operation at the time of normal conveyance. 5 is a timing chart for explaining a sheet feeding operation at the time of interleaf conveyance. FIG. 6 is an explanatory diagram (part 1) for describing a sheet feeding operation at the time of interleaf conveyance. FIG. 13 is an explanatory diagram (part 2) for describing the sheet feeding operation at the time of interleaf conveyance. FIG. 5 is an explanatory view showing a sheet stacked on a sheet discharge tray. It is a timing chart for explaining the sheet feeding operation at the time of normal conveyance of a modification. It is a timing chart for explaining sheet feeding operation at the time of conveyance of an interleaving paper of a modification.

Hereinafter, a printing apparatus according to an embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a stencil printing apparatus 1 which is an example of a printing apparatus.

  As shown in FIG. 1, the stencil printing apparatus 1 includes an apparatus casing 2, an operation panel unit 3, an original reading unit 4, a cam drive unit 5, a plate discharge unit 6, a paper discharge unit 7, and a control unit. A printing unit 10, a sheet feeding unit 20, and a plate making unit 30 are provided. Further, as shown in FIG. 3 described later, the stencil printing apparatus 1 further includes a read only memory (ROM) 41, a random access memory (RAM) 42, and motor drive circuits 43 and 44. Although the stencil printing apparatus 1 will be described below, the printing apparatus according to the present embodiment is not limited to the stencil printing apparatus 1, and may be an inkjet printing apparatus or another printing apparatus.

The operation panel unit 3 and the document reading unit 4 are disposed on the upper portion of the apparatus housing 2.
The operation panel unit 3 has operation keys and the like for performing various operations of the stencil printing apparatus 1 and functions as an input unit of the stencil printing apparatus 1.

The document reading unit 4 has a scanner that reads image information from a document.
The cam drive unit 5 clamps the leading end of the stencil sheet (master) S on a clamp unit 15 of the printing unit 10 described later, and bounces the stencil sheet S printed on the clamp unit 15 and the flip-up unit 16 from the drum 11 Let

The plate discharge unit 6 accommodates the stencil sheet S that has been flipped up from the drum 11.
The paper discharge unit 7 discharges the printed paper P conveyed from the printing unit 10 from the apparatus housing 2, and discharges the paper P shown in FIG. 7 onto which the paper P discharged from the apparatus housing 2 is stacked. It has paper stand 7a etc.

  The control unit 8 has a processor (for example, CPU: Central Processing Unit) that functions as an arithmetic processing unit that controls the operation of the whole stencil printing apparatus 1. For example, the control unit 8 reads the control program stored in the ROM 41 shown in FIG. 3 and executes the control program while using the RAM 42 as a working storage area.

  The printing unit 10 includes a drum 11, a central shaft 12, an encoder 13, a drum motor 14, a clamp unit 15, a flip-up unit 16, a press roller 17, and a peeling claw 18.

  The drum 11 has a cylindrical shape centered on a central axis 12 parallel to the width direction of the stencil sheet S and the paper P. A large number of holes are formed on the outer peripheral surface of the drum 11. In addition, a stencil sheet S which has been thermally perforated by the thermal head 32 of the plate making unit 30 described later is wound around the outer peripheral surface of the drum 11.

  An ink insertion port 12 a for inserting the ink IK is formed in the central shaft 12. The ink IK exudes from the above-described many holes formed on the outer peripheral surface of the drum 11.

The encoder 13 is attached to the drum motor 14.
The drum motor 14 rotates the drum 11 counterclockwise in FIG. 1 around the central axis 12.

  The clamp unit 15 is provided on the drum 11 and fixes one end of the stencil sheet S to the drum 11 by clamping the front end of the stencil sheet S.

  The flip-up unit 16 is provided on the drum 11 and performs a release operation for releasing the stencil sheet S fixed to the drum 11 by the clamp unit 15 from the fixed state.

  The press roller 17 is provided below the drum 11. The press roller 17 presses the sheet P against the stencil sheet S wound around the drum 11 and rotating with the drum 11.

  The peeling claw 18 is provided below the drum 11 and peels the sheet P printed by the printing unit 10 from the stencil sheet S (drum 11).

  The plate making unit 30 includes a base paper storage unit 31, a thermal head 32, a platen roller 33, a base paper feed roller 34, and a base paper cutter 35.

The raw paper container 31 accommodates the stencil sheet S wound in a roll shape.
The thermal head 32 performs heat-sensitive perforation on the stencil sheet S based on, for example, image information obtained from the document reading unit 4.

The platen roller 33 sandwiches the stencil sheet S with the thermal head 32.
The raw paper feed roller 34 carries the stencil sheet S on which the heat sensitive perforation has been performed.

  The sheet cutter 35 cuts the stencil sheet S conveyed by the sheet feed roller 34 one by one. The stencil sheet S of one plate cut by the stencil cutter 35 is wound around the drum 11 described above.

FIG. 2 is a view schematically showing the sheet feeding unit 20 of the stencil printing apparatus 1.
FIG. 3 is a block diagram for explaining a control configuration of the sheet feeding unit 20. As shown in FIG.

  As shown in FIG. 2, the sheet feeding unit 20 includes a scraper roller 21 and a pickup roller 22 which are an example of one or more sheet feeding rollers (primary sheet feeding rollers), an electromagnetic clutch 23, a separating plate 24, and a sheet. It has a detection sensor 25, secondary sheet feeding rollers 26, 27, a sheet feeding table 28, a first drive motor M1, and a second drive motor M2.

  The scraper roller 21 is disposed above the plurality of sheets P stacked on the sheet feeding table 28. The scraper roller 21 is a delivery roller that delivers and conveys the topmost sheet P among the plurality of sheets P stacked.

  The pickup roller 22 is located, for example, above the fed sheet P. The pickup roller 22 conveys the sheet P fed by the scraper roller 21. Thus, the sheet P is fed (primary sheet feeding). The pickup roller 22 is an example of a first roller for conveying the sheet P.

  The electromagnetic clutch 23 is switched between an ON state for transmitting power from the first drive motor M1 to the scraper roller 21 and the pickup roller 22 and an OFF state for not transmitting the power from the first drive motor M1 under the control of the control unit 8 shown in FIG.

  The winding plate 24 is disposed to face the pickup roller 22. At least the contact surface with the sheet P is formed of rubber, thereby causing the sheet P to generate frictional resistance. As a result, the separating plate 24 separates the sheets P one by one with the pickup roller 22.

  The sheet detection sensor 25 is, for example, an optical sensor that detects the presence or absence of the sheet P. As an example, the sheet detection sensor 25 outputs an ON signal when detecting a sheet P, and outputs an OFF signal when not detecting a sheet P. These signals are acquired by the control unit 8.

  The secondary sheet feeding rollers 26 and 27 are disposed downstream of the pickup roller 22 in the sheet conveyance direction D, and convey the sheet P conveyed by the pickup roller 22. One of the secondary sheet feeding rollers 26 and 27 is driven by a second driving motor M2. The leading edge of the sheet P is once hit in a state in which the rotation of the secondary sheet feeding roller 26 is stopped even if the sheet P is not limited to the interleaf sheet P0 described later, and the other sheet P. The sheet P whose front end abuts on the secondary sheet feeding roller 26 is slightly conveyed by the pickup roller 22, whereby skew correction and feed amount adjustment are performed. The secondary sheet feeding roller 26 is an example of a second roller which is disposed downstream of the pickup roller 22 in the sheet conveying direction D and conveys the sheet P.

The sheet feeding table 28 is disposed, for example, vertically movable, and the sheets P are stacked.
The first drive motor M1 drives the scraper roller 21 and the pickup roller 22 by the control unit 8 outputting a control signal to the motor drive circuit 43, as shown in FIG. The second drive motor M2 drives the secondary paper feed roller 26 by the control unit 8 outputting a control signal to the motor drive circuit 44. The first drive motor M1 and the second drive motor M2 are drive means for driving at least one of the pickup roller 22 (first roller) and the secondary paper feed roller 26 (second roller). It is an example.

  FIG. 4 is a timing chart for explaining the sheet feeding operation at the time of normal conveyance (at the time of conveyance of the sheet P shown in FIG. 2).

  FIG. 5 is a timing chart for explaining the sheet feeding operation at the time of interleaf conveyance (at the time of conveyance of the interleaf P0 shown in FIGS. 6A and 6B).

  First, as shown in FIG. 4, the control unit 8 transmits the power of the first drive motor M1 to the scraper roller 21 and the pickup roller 22 via the electromagnetic clutch 23 in the ON state, so that the first drive motor M1 is operated. And control the electromagnetic clutch 23 (time T1). Thereby, the feeding of the sheet P is started.

  Next, the control unit 8 detects the sheet P by the sheet detection sensor 25 and starts outputting the ON signal (time T2), and after the first predetermined time has elapsed (time T3), the secondary sheet feeding roller The second drive motor M2 is started so as to drive 26. By setting the time T3 to a time slightly later than the timing when the sheet P reaches the secondary sheet feeding roller 26, the leading edge of the sheet P on the secondary sheet feeding roller 26 in a state in which the rotation is stopped as described above. Can be used for skew correction and feed amount adjustment of the sheet P. The timing at which the sheet P reaches the secondary sheet feeding roller 26 can be calculated by the control unit 8 based on, for example, the transport speed of the sheet P or the detection result of the sheet detection sensor 25.

  Next, the control unit 8 detects that the sheet detection sensor 25 detects the sheet P and starts outputting the ON signal (time T2), and then, for example, turns off the electromagnetic clutch 23 after a second predetermined time (time T4) By setting the state, the drive of the pickup roller 22 is stopped.

  Thereafter, for example, at the timing when the sheet detection sensor 25 no longer detects the sheet, that is, the timing when the output of the OFF signal is started (time T5), the control unit 8 starts the conveyance of the second sheet P. The first drive motor M1 and the electromagnetic clutch 23 are controlled to transmit the power of the first drive motor M1 to the scraper roller 21 and the pickup roller 22 via the electromagnetic clutch 23 in the ON state. Thereafter, the sheet detection sensor 25 detects the second sheet P and starts the output of the ON signal (time T6).

  The timing chart at the time of conveyance of the interleaving paper P0 shown in FIG. 5 is the timing (time T3-1) at which the control section 8 starts driving the second drive motor M2 at the time of conveyance of the normal sheet P shown in FIG. This point is different from the timing chart shown in FIG. 4 only in that the timing (time T3) is delayed. Note that, for example, the control unit 8 interposes the interleaf sheet P0 on the sheet P printed at the timing of each print job or each predetermined number of sheets based on the setting of the user.

  6A and 6B are explanatory diagrams for explaining the sheet feeding operation at the time of conveyance of the interleaving paper P0.

  As shown in FIG. 6A, the interleaving paper P0 is in a stopped state by delaying the timing of starting driving of the second drive motor M2 than the time T3 at the time of conveyance of the sheet P at time T3-1 described above. The time for which the sheet is conveyed by the pickup roller 22 while the front end abuts on the secondary sheet feeding roller 26 is long. As a result, slack P0a is generated on the interleaf P0 between the pickup roller 22 and the secondary sheet feeding roller 26. The slack P0a is, for example, a portion which is slackened upward across the entire width direction orthogonal to the conveyance direction D in the interleaf P0.

  As shown in FIG. 6B, the interleaving paper P0 in the state in which the slack P0a is generated as described above is started on both sides of the conveyance direction D across the slack P0a as shown in FIG. Is inserted into the secondary sheet feeding rollers 26 and 27 collectively, and a fold line P0 b is formed on the interleaving paper P0.

  When the interleaving paper P0 in which the fold line P0b is formed as described above is conveyed to the paper discharge unit 7 shown in FIG. 1, the paper P is bulked on the paper discharge tray 7a as shown in FIG. It will be. Therefore, the user can easily determine that the interleaf P0 is inserted. Although the interleaving paper P0 shown in FIG. 7 is in a state in which the slack P0a is left (a state in which the interleaving paper P0 is folded back at the crease P10b), the slack P0a is eliminated in the process of conveying the interleaving paper P0, and the crease P0b is Even if only the above is left, the fold P0b makes it easy for the user to determine that the interleaf P0 is inserted.

  FIG. 8 is a timing chart for explaining the sheet feeding operation at the time of normal conveyance of the modified example (at the time of conveyance of the sheet P shown in FIG. 2).

  FIG. 9 is a timing chart for explaining the sheet feeding operation at the time of conveying the interleaving paper (when conveying the interleaving paper P0 shown in FIGS. 6A and 6B) of the modification.

  At timing when driving of the secondary sheet feeding roller 26 by the second drive motor M2 starts at time T3 shown in FIG. 4 described above, for example, as shown in FIG. Drive may be stopped (time T4-1 = time T3). Even in this case, the pickup roller 22 can rotate along with the movement of the sheet P conveyed by the secondary sheet feeding roller 26.

  On the other hand, at the time of conveyance of the interleaving paper P0 shown in FIG. 9, the timing for starting the driving of the secondary sheet feeding roller 26 is time T3-1 as described above, but the driving of the pickup roller 22 is stopped according to this timing. Then, it is inserted into the secondary sheet feeding roller 26 and the fold line P0b is not formed so that the slack P0a of the interleaf sheet P0 is eliminated, so that it is later than the timing when the secondary sheet feeding roller 26 starts driving. As shown in FIG. 6B, the pickup roller is at a timing (time T4-2) after the both sides in the conveyance direction D sandwiching the slack P0a of at least the interleaf P0 are collectively inserted into the secondary sheet feeding rollers 26 and 27. It is good to stop the driving of 22.

  In the present embodiment, in a state where the driving of the secondary sheet feeding roller 26 is stopped, the recording sheet P0 is conveyed by the pickup roller 22 while the front end of the interleaving sheet P0 is in contact with the secondary sheet feeding roller 26. An example in which the fold P0 b is formed by loosening the interleaving paper P0 has been described, but in a state in which a portion other than the leading end of the interleaving paper P0 is nipped by the pair of secondary paper feeding rollers 26 and 27. In the same manner, the fold P0b may be formed. Further, even while the interleaf P0 is being conveyed while being nipped by the secondary sheet feeding rollers 26 and 27, the rotational speed (angular velocity) of the pickup roller 22 is made faster than that of the secondary sheet feeding roller 26. It is likewise possible to form a fold line P0b.

  When the secondary sheet feeding rollers 26 and 27 are driven rollers, it is possible to form the fold line P0b only by controlling the acceleration of the pickup roller 22 of the first drive motor M1 that drives the pickup roller 22. is there. Therefore, only the first drive motor M1 for driving the pickup roller 22 may be used as a drive unit controlled by the control unit 8 to form the fold line P0b. Furthermore, when the pickup roller 22 is a driven roller and, for example, the interleaf P0 is transported by the driving of the scraper roller 21, the secondary paper feeding of the second drive motor M2 which drives the secondary paper feeding roller 26. It is possible to form the fold line P0b by controlling the roller 26 to stop or decelerate. Therefore, only the second drive motor M2 for driving the secondary paper feed roller 26 may be used as a drive unit controlled by the control unit 8 to form the fold line P0b. As described above, as the driving unit, any unit that drives at least one of the pickup roller 22 (first roller) and the secondary sheet feeding roller 26 (second roller) may be used.

  Further, in the present embodiment, the interleaf P0 is slackened between the pickup roller 22 which is an example of the first roller and the secondary sheet feeding roller 26 which is an example of the second roller to form a fold line P0b. Although the example has been described, the first roller and the second roller may be other rollers of the printing apparatus. For example, in the stencil printing apparatus 1 shown in FIG. 1, the first roller and the second roller may be sheet discharge rollers disposed in the sheet discharge unit 7, or the sheet feeding unit 20 and the sheet discharge unit 7 may be discharged. It may be a roller or the like disposed between the paper unit 7 and the like. Furthermore, a plurality of folds P0a may be formed on the interleaving paper P0 at a plurality of positions in the transport path.

  When a pair of transport rollers or a pair of transport belts having a variable interval is disposed in the transport path of the printing apparatus, an increase in thickness of the interleaving paper P0 accompanying the formation of the fold P0b is allowed. The distance between the pair of rollers or the pair of belts may be increased at least during conveyance of the interleaf P0.

  In the embodiment described above, the stencil printing apparatus 1 which is an example of a printing apparatus includes a pickup roller 22 which is an example of a first roller, and a secondary sheet feeding roller 26 which is an example of a second roller. A control unit 8 is provided with a first drive motor M1 and a second drive motor M2, which are an example of drive means for driving at least one of the pickup roller 22 and the secondary paper feed roller 26. The pickup roller 22 and the secondary sheet feeding roller 26 convey the sheet P. The secondary sheet feeding roller 26 is disposed downstream of the pickup roller 22 in the sheet feeding direction D. The first drive motor M1 drives the pickup roller 22, and the second drive motor M2 drives the secondary paper feed roller 26. The control unit 8 collectively feeds secondary sheets P0 (sheets P) in a state of being slackened between the pickup roller 22 and the secondary sheet feeding roller 26 collectively on both sides in the conveyance direction D across the slack P0a. The first drive motor M1 and the second drive motor M2 are controlled so as to form a fold line P0b in the interleaving paper P0 by inserting the roller 26 into the paper 26. As described above, by forming the fold line P0b in the interleaving paper P0 by drive control of at least one of the pickup roller 22 and the secondary paper feeding roller 26, it is possible to easily determine the insertion position of the interleaving paper P0. Therefore, it is possible to avoid using consumables such as paper tape, staples, and plural sheets of paper P for sorting. Furthermore, since a mechanism for sorting consumables is not required, it is possible to prevent the configuration from being complicated. Therefore, according to the present embodiment, it is possible to easily determine the insertion position of the interleaving paper P0 while suppressing consumption of consumables with a simple configuration.

  Further, in the present embodiment, the control unit 8 butts the leading edge of the interleaf P0 (sheet P) against the secondary sheet feeding roller 26 in a state in which the secondary sheet feeding roller 26 (second roller) is stopped. The first drive motor M1 and the second drive motor M2 are controlled so as to loosen the paper P0 by rotating the pickup roller 22 as it is. Therefore, the fold P0b can be formed on the interleaf P0 while performing skew correction and feed amount adjustment by transporting the sheet P by the pickup roller 22 while the sheet P is in contact with the secondary sheet feeding roller 26. . Therefore, the fold P0b can be formed on the interleaving paper P0 with simple control, and the time for forming the fold P0b can be shortened.

  Further, in the present embodiment, the stencil printing apparatus 1 includes the scraper roller 21 and the pickup roller 22 which are an example of one or more sheet feeding rollers for feeding the sheet P from the plurality of stacked sheets P. The pickup roller 22 is adopted as the first roller. Therefore, the fold P0b can be formed on the interleaf P0 with a simple configuration and simple control using the pickup roller 22 for paper feeding and the first drive motor M1.

  The present invention is not limited to the above-described embodiment as it is, and constituent elements can be modified and embodied without departing from the scope of the present invention at the implementation stage. In addition, various inventions can be formed by appropriate combinations of a plurality of components disclosed in the above-described embodiment. For example, all the components shown in the embodiment may be combined as appropriate. Of course, various modifications and applications are possible without departing from the scope of the invention. The invention described in the claims at the beginning of the application of the present application is appended below.

[Supplementary Note 1]
A first roller for transporting the sheet;
A second roller disposed downstream of the first roller in the sheet conveyance direction and configured to convey the sheet;
Drive means for driving at least one of the first roller and the second roller;
A crease is formed in the sheet by inserting the sheets in a state of being slackened between the first roller and the second roller into the second roller collectively on both sides in the conveying direction across the slack. A control unit to control the drive means to form;
A printing apparatus comprising:

[Supplementary Note 2]
The control unit is configured to cause the sheet to be loosened by rotating the first roller while the front end of the sheet is in contact with the second roller in a state in which the second roller is stopped. Control the
The printing apparatus according to appendix 1, wherein

[Supplementary Note 3]
Equipped with one or more feed rollers that feed sheets from stacked sheets of paper;
The first roller is a paper feed roller.
The printing apparatus according to any one of appendices 1 and 2, characterized in that

DESCRIPTION OF SYMBOLS 1 stencil printing apparatus 2 apparatus housing 3 operation panel section 4 document reading section 5 cam drive section 6 plate discharging section 7 sheet ejection section 7 a sheet ejection stand 8 control section 10 printing section 11 drum 12 central axis 12 a ink insertion port 13 encoder 14 drum Motor 15 Clamping part 16 Lifting part 17 Press roller 18 Peeling claw 20 Sheet feeding part 21 Scraper roller (sheet feeding roller)
22 Pickup roller (paper feed roller)
23 electromagnetic clutch 24 sheet board 25 sheet detection sensor 26, 27 secondary sheet feed roller 28 sheet feed table 30 plate making section 31 base sheet accommodation section 32 thermal head 33 platen roller 34 base sheet feed roller 35 base sheet cutter 41 ROM
42 RAM
43, 44 Motor drive circuit D Conveying direction M1 1st drive motor M2 2nd drive motor P Paper P0 Interleaf P0a Slack P0b Fold S S stencil sheet (master)

Claims (3)

A first roller for transporting the sheet;
A second roller disposed downstream of the first roller in the sheet conveyance direction and configured to convey the sheet;
Drive means for driving at least one of the first roller and the second roller;
A crease is formed in the sheet by inserting the sheets in a state of being slackened between the first roller and the second roller into the second roller collectively on both sides in the conveying direction across the slack. A control unit to control the drive means to form;
A printing apparatus comprising: The control unit is configured to cause the sheet to be loosened by rotating the first roller while the front end of the sheet is in contact with the second roller in a state in which the second roller is stopped. Control the
The printing apparatus according to claim 1, Equipped with one or more feed rollers that feed sheets from stacked sheets of paper;
The first roller is a paper feed roller.
The printing apparatus according to claim 1 or 2, characterized in that: