Method for feeding base paper for Western envelopes and method for manufacturing Western envelopes

Abstract

To provide a paper feeding method capable of feeding side-opening envelope base paper of a type in which a notch is formed at a center in a width direction of an end part of a rear surface part of the base paper.SOLUTION: A paper feeding method for pulling out side-opening envelope base paper, in which a notch 1c is formed at a center in a width direction of an end part of a rear surface part 1b of the base paper, one by one from a laminated body 1' of the side-opening envelope base paper, includes a suction step for sucking the rear surface part 1b of the side-opening envelope base paper in the lowest layer of the laminated body 1' to hold the same by suction blocks 14, 14 by actuating suction ports 14a, 14a opened at the suction blocks 14, 14. The number of the suction ports is two or more, and the rear surface part of the base paper is held by the suction blocks 14, 14 at least at both ends in the width direction of the notch.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a method for feeding base paper for Western-style envelopes and a method for manufacturing Western-style envelopes. [Background technology]

[0002] Traditionally, envelopes are manufactured through a punching process in which envelope base paper is made by punching, an extraction process in which a single sheet of envelope base paper is extracted from a stack (also called a "stack") of the created envelope base paper, and a folding process in which the extracted sheet of envelope base paper is folded, glued, and otherwise processed. Extracting a single sheet of envelope base paper from a stack is usually called "paper feeding."

[0003] For example, when feeding the type of envelope base paper 20 shown in Figure 10, the widthwise center 20c of the end of the portion 20b (hereinafter referred to as the "back surface of the base paper") that overlaps with the flap portion 20a when folded is held in place.

[0004] Similarly, when feeding the envelope base paper 30 of the type shown in FIG. 11, the widthwise center 30c of the end of the back surface 30b of the base paper that overlaps the flap portion 30a when folded is held. Summary of the Invention [Problem to be solved by the invention]

[0005] The inventors have devised a structure in which notches are formed in the center edges 20c, 30c of the back surface of the envelope, making it easier to check the contents inside the envelope and to remove them. However, the above-mentioned conventional paper feeding method cannot feed this type of envelope base paper.

[0006] The present invention aims to provide a paper feeding method capable of feeding a type of Western-style envelope base paper in which a notch is formed in the center of the width direction of the end of the back surface of the base paper, and a method for manufacturing Western-style envelopes made from such Western-style envelope base paper. [Means for solving the problem]

[0007] In order to solve the above problem, the method for feeding Western-style envelope base paper of the present invention is a feeding method for extracting Western-style envelope base paper one sheet at a time from a stack of Western-style envelope base paper in which a notch is formed in the center of the width direction of the end of the back surface of the base paper, and includes a suction step in which the back surface of the Western-style envelope base paper in the bottom layer of the stack is sucked in and held in the suction block by operating a suction nozzle formed in an opening in the suction block, and is characterized in that the number of suction nozzles is two or more, and the back surface of the base paper is held in the suction block at least at both widthwise ends of the notch.

[0008] In addition, in order to solve the above-mentioned problems, the manufacturing method of the present invention for Western-style envelopes comprises a punching process for creating Western-style envelope base paper by punching, a paper feeding process for extracting one sheet of Western-style envelope base paper from a stack of created Western-style envelope base paper, and a folding process for folding the extracted sheet of Western-style envelope base paper, wherein in the punching process, Western-style envelope base paper is created with a notch formed in the center of the width direction at the end of the back side of the base paper, and the paper feeding process includes a suction process for activating a suction nozzle formed in a suction block to suck in the back side of the base paper of the Western-style envelope base paper at the bottom layer of the stack and hold it in the suction block, and is characterized in that there are two suction nozzles, and the back side of the base paper is held by the suction block at both widthwise ends of the notch.

[0009] It is preferable that the manufacturing method further comprises an inter-suction nozzle distance adjusting step of adjusting the distance between the two suction nozzles, which is carried out before the punching step or between the punching step and the paper feeding step. [Effects of the Invention]

[0010] According to the present invention, a paper feeding method can be provided that can feed a type of Western-style envelope base paper that has a notch formed in the center of the width direction at the end of the back surface of the base paper, and a method for manufacturing Western-style envelopes made from such Western-style envelope base paper. [Brief explanation of the drawings]

[0011] [Figure 1]1A is a diagram showing a base paper for an envelope fed by a paper feeding method according to an embodiment of the present invention, and FIG. 1B is a diagram showing a folded envelope. [Figure 2] 1 is a flow diagram of a manufacturing method according to an embodiment of the present invention. [Figure 3] 1 is a perspective view of a paper feeder for carrying out a paper feed method according to an embodiment of the present invention, as seen from above; [Figure 4] 1 is a perspective view showing a paper feeding device (movement of a claw) that is executing a paper feeding method according to an embodiment of the present invention; [Figure 5] 1 is a perspective view showing a paper feeding device (movement of the foot and the suction nozzle) that is executing a paper feeding method according to an embodiment of the present invention; [Figure 6] FIG. 10 is a flow chart of a manufacturing method according to a first modified example of the present invention. [Figure 7] FIG. 10 is a perspective view, seen from above, of a paper feeding device for carrying out a paper feeding method according to a second modified example of the present invention. [Figure 8] 1A is a diagram showing an example of a base paper for a Western-style envelope that can be fed by the paper feeding method according to the present invention, and FIG. 2B is a diagram showing an example of a folded Western-style envelope. [Figure 9] 1A and 1B are diagrams showing another example of a base paper for a Western-style envelope (A) that can be fed by the paper feeding method according to the present invention, and a folded Western-style envelope (B). [Figure 10] 1A and 1B are diagrams showing an example of a conventional Western-style envelope base paper (A) and a folded Western-style envelope (B). [Figure 11] 1A and 1B are diagrams showing another example of a conventional Western-style envelope base paper (A) and a folded Western-style envelope (B). DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, examples of a paper feeding method and a manufacturing method according to the present invention will be described with reference to the accompanying drawings. In this example, the case of feeding the base paper 1 for Western-style envelopes shown in Figure 1 (i.e., base paper having a substantially trapezoidal notch 1c formed in the widthwise center of the end of the back surface 1b of the base paper that overlaps with the flap 1a when folded) and the case of manufacturing Western-style envelopes using the base paper 1 will be described. [Example]

[0013] As shown in Figure 2, Western-style envelopes are manufactured through a punching process S1 in which Western-style envelope base paper 1 is produced by punching, a paper feeding process S2 in which one sheet of Western-style envelope base paper 1 is extracted from a stack (stack) 1' of the produced Western-style envelope base paper 1, and a folding process S3 in which the extracted sheet of Western-style envelope base paper 1 is subjected to processing such as folding and gluing.

[0014] 3 shows the paper feeder 10 used in the paper feed process S2. The paper feeder 10 includes a paper feed table 11 on which a stack 1' of envelope base paper 1 is placed, a pair of support legs 12, 12 that support from below both widthwise ends of the back surface 1b of the envelope base paper 1 protruding from the paper feed table 11, paper stoppers 13, 13 provided on each of the support legs 12, 12 for positioning the back surface 1b, suction blocks 14, 14 provided between the support legs 12, 12, and claws 15, 15 provided slightly above the suction blocks 14, 14. A suction port 14a is formed in the surface of each suction block 14.

[0015] When the stack 1' of envelope base paper 1 is positioned by the paper stoppers 13, 13, the back surface 1b of the base paper is present above the tips of the suction nozzles 14a, 14a and the claws 15, 15.

[0016] The positions of the suction blocks 14, 14 (suction ports 14a, 14a) and the claws 15, 15 can be arbitrarily adjusted between the geta 12, 12.

[0017] The sheet feeding device 10 feeds one sheet of envelope base paper 1 at the bottom of the stack 1' by the following operation of each section. (1) As shown in FIG. 4, the claws 15, 15 move upward slightly in a pendulum-like arc. (2) The suction nozzles 14a, 14a suck the bottom sheet of the bundle 1' at the back surface 1b of the envelope base paper 1 (both ends of the notch 1c in the width direction). (3) The claws 15, 15 return to the space between the single sheet of envelope base paper 1 that has been sucked in and the remaining stack 1' stacked on top. (4) As shown in FIG. 5, the suction blocks 14, 14 are lowered, and the slippers 12, 12 swing upward in a pendulum-like arc, clearing the way for the envelope base paper 1 to be fed.

[0018] In this way, the paper feeder 10 can perform a suction process in which the suction ports 14a, 14a formed in the suction blocks 14, 14 are operated to suck in the back surface 1b of the envelope base paper 1 at the bottom of the stack 1' and hold it in the suction blocks 14, 14. At this time, the back surface 1b of the base paper is held by the suction blocks 14, 14 at both widthwise ends of the cutouts 1c.

[0019] According to the paper feeding method and manufacturing method of the embodiment of the present invention, the suction blocks 14, 14 hold both widthwise ends of the notch 1c, so that the bottommost envelope base paper 1 can be fed stably.

[0020] Although the paper feeding method and manufacturing method according to the present invention have been described above as examples, the present invention is not limited to these configurations.

[0021] [First Modification] For example, the manufacturing method according to the present invention may further include an inter-suction nozzle distance adjusting step S4 for adjusting the distance between the two suction nozzles 14a, 14a, which is performed before the punching step S1 or between the punching step S1 and the paper feeding step S2 (see FIG. 6). By performing the inter-suction nozzle distance adjusting step S4, base paper 1 for envelopes having notches 1c of various shapes can be stably fed.

[0022] [Second Modification] In addition, the paper feeding device 10 used in the paper feeding method of the present invention (paper feeding step S2 of the manufacturing method) may be equipped with a large suction block 16 having two suction ports 14a, 14a formed therein instead of the suction blocks 14, 14 (see Figure 7).

[0023] [Other variations] Furthermore, the paper feeding method (paper feeding step S2 of the manufacturing method) according to the present invention can also feed envelope base paper having notches of various shapes, as exemplified in Figures 8 and 9. That is, the paper feeding method (paper feeding step S2 of the manufacturing method) according to the present invention can also feed envelope base paper 40 having notch 40c formed in a position shifted from the center in the width direction, or envelope base paper 50 having wide notch 50c formed in it. [Explanation of symbols]

[0024] 1. Western envelope base paper 1a Flap section 1b Back side of base paper 1c Notch 10 Paper feeder 11 Paper feed stand 12 Geta 13 Paper Cover 14 Suction block 14a Mouthpiece 15 Nails 16 Suction block

Claims

1. A paper feeding method for extracting envelope base paper one by one from a stack of envelope base paper having a notch formed in the center of the width direction at the end of the back surface of the base paper, comprising: a step of raising a claw provided above the suction block upward in an arc; a suction step in which a suction port formed in the suction block is actuated to suck in the back surface of the envelope base paper at the bottom of the stack, thereby holding the envelope base paper in the suction block; a step of returning the claw to a space between the sucked sheet of envelope base paper and the remaining sheet of envelope base paper; the suction block is lowered, and a step supporting the envelope base paper from below is raised in an arc to clear a path for the envelope base paper, and the envelope base paper is fed, A paper feeding method for Western-style envelope base paper, wherein the number of suction nozzles is two or more, and at least both widthwise ends of the notch on the back surface of the base paper are held by the suction block by suction from the suction nozzles.

2. A method for manufacturing a Western envelope, A punching process to create envelope base paper by punching; a paper feeding step of extracting one sheet of the envelope base paper from the stack of the envelope base paper sheets produced by the punching step; a folding step of folding one sheet of the envelope base paper extracted by the paper feeding step, The punching step is to prepare a base paper for an envelope by forming a notch in the center of the width direction at the end of the back surface of the base paper, which will be the back surface of the envelope; The paper feeding step includes: a step of raising a claw provided above the suction block upward in an arc; a suction step in which a suction port formed in the suction block is actuated to suck in the back surface of the envelope base paper at the bottom of the stack, thereby holding the envelope base paper in the suction block; a step of returning the claw to a space between the sucked sheet of envelope base paper and the remaining sheet of envelope base paper; a step of lowering the suction block, and raising a step supporting the envelope base paper from below in an arc to clear a path for the envelope base paper, and feeding the envelope base paper; A method for manufacturing a Western-style envelope, wherein the number of suction nozzles is two, and both widthwise ends of the notch on the back surface of the base paper are held by the suction block by the suction nozzles.

3. 3. The method for manufacturing envelopes according to claim 2, further comprising a step of adjusting a distance between the two suction nozzles, which is carried out before the punching step or between the punching step and the paper feeding step.

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