GB2326499A

GB2326499A - Reading identifications eg bar code.

Info

Publication number: GB2326499A
Application number: GB9806174A
Authority: GB
Inventors: Shintarou Ohashi; Kazuo Fukunaga; Yujiro Yoshida; Matsuo Shiranaga; Hiroyuki Kawasaki; Takashi Nakamura; Tadao Tatezuki; Minoru Masuda
Original assignee: Fujitsu Ltd
Current assignee: Fujitsu Ltd
Priority date: 1997-06-19
Filing date: 1998-03-23
Publication date: 1998-12-23
Also published as: CN1203402A; KR19990006594A; JPH1115907A; GB9806174D0

Abstract

A marker 14 is attached to a bar code reader 10. Upon determining that a bar code has been read, the bar code or item to which the bar code is attached is marked. The marking may be done automatically by generating a marking drive signal or the marking may be done manually. Because the marker is attached to the bar code reader, both reading of the bar code and marking may be performed with one hand. Also, a bar code is prevented from being read twice, and any bar code to be read is prevented from being skipped.

Description

BAR CODE SCANNER AND BAR CODE READING METHOD The invention relates to a bar code scanner and reading method. For instance, at delivery centers in transportation and distribution industries, this bar code scanner and reading method enable easy use and single-handed operation by an employee even while the employees perform additional tasks, such as bar code marking or numeric input.

In the transportation and distribution industries, parcels are marked with bar codes, which are read by bar code scanners in collection, delivery, and other processes. The results are input to computers, improving work efficiency.

The following exemplifies the use of bar codes: (1) In segments of the transportation industry such as home delivery services, merchandise ordered by customers at agencies is collected at distribution terminals and classified into delivery areas.

Figure 8(A) shows the configuration of a distribution system and the tasks performed at distribution terminals. Articles of merchandise ordered by customers at agency 101 are collected at the nearest distribution terminal 1 02a or 102b, then delivered to distribution terminal 103a or 103b (whichever is nearest the delivery destination). At distribution terminals 103a and 103b, the articles of merchandise are inspected, classified according to delivery destinations, then delivered to the delivery destinations.

Each article of merchandise supplied from each agency 101 comes with an attached slip containing a bar code. At distribution terminals 1 02a and 102b, employees use bar code scanner 104 to read the bar code on the slips attached to the merchandise, to classify the merchandise for distribution terminal 1 03a or 1 03b according to the delivery destination, and then to stock the merchandise on classification shelves 105 according to distribution terminals.

At distribution terminals 1 03a and 103b, merchandise transported from distribution terminals 1 02a and 1 02b is inspected and classified according to delivery destination.

Employees use bar code scanners 104 to scan the bar code on the attached slips to inspect the merchandise, to classify the merchandise according to the nearest distribution terminal (103a or 103b) based on delivery destination, and then to stock the merchandise on classification shelves 109 according to the distribution terminal. The merchandise classified on classification shelves 109 according to the distribution area is loaded on transportation vehicles for individual areas and transported to the distribution destination specified by the customer.

At distribution terminals 102a, 102b, 103a, and 103b, bar code information on each article of merchandise scanned by bar code scanner 104 is entered into computer 107 at each delivery center via optical adapter 106 or wireless communication. The bar code information is then used to create a list of products handled. The information entered into computer 107 at each distribution terminal is sent to computers 58 at headquarters and business offices for use in office work via communication lines.

The bar code on merchandise is read by using bar code scanners at agency 101 and distribution terminals 1 02a and 102b, and data is collected at computers 108 at headquarters and business offices. The bar codes are read in every phase and data is collected by computers to quickly answer inquiries from customers.

During inspection conducted at distribution terminals 1 03a and 1 03b which are the final phase of delivering merchandise to customers, employees must not mistakenly scan bar codes twice or overscan bar codes, and must be able to easily distinguish between merchandise already scanned and merchandise to be scanned.

Therefore, as shown in Figure 8(B), the employee 110 holds bar code scanner 111 in one hand and a marking pen 112 (e.g., red pen) in the other hand. The bar code 114 on merchandise 113 is read by the bar code scanner 111. When scanning is completed, a read completion mark 115 is made near bar code 114 with marking pen 112 so that employees can easily distinguish between products already scanned and products yet to be scanned.

(2) In the air cargo segment of the transport industry, companies are entrusted by carriers around the world to handle customs and to transport cargo to customers. After arrival at airports, the cargo (i.e., merchandise) that is unloaded from the aircraft is received and inspected.

Each article of merchandise subject to customs and delivery comes with an attached slip containing a printed bar code. At the reception site, merchandise bar codes on the attached slips are scanned, the merchandise is inspected and collated with forwarded lists submitted by those requesting delivery, and customs lists are drawn up.

Should any damaged merchandise be found, supplemental information about the damage is input via the bar code scanner.

(3) In the distribution industry, delivery centers such as supermarkets draw up pickup lists indicating the quantity of goods to be delivered to each store, then deliver the goods.

The distribution centers stock merchandise in containers and on shelves according to the type of merchandise. Employees pick up the specified quantity of merchandise from stock locations based on the pick-up lists, then place the merchandise in containers to be delivered to their destinations. FoMtarders deliver these containers to the destinations.

For this pick-up work, employees scan the bar code on merchandise and enter the quantity of each item picked up on the bar code scanner keypad.

(4) To simplify an inventory at a supermarket, the bar codes of merchandise stocked on the shelves at stores and in warehouses are scanned with bar code scanners, the quantities of merchandise are entered on the bar code scanner keypads.

Since the above work requires that employees scan the bar codes on merchandise with bar code scanners while doing additional tasks, portable bar code scanners are often used.

The following types of portable bar code scanners are available: (1) Pen-type portable bar code scanners that radiate light onto the merchandise from the point of the pen, then detect the reflected bar code.

(2) Touch-type portable bar code scanners that radiate light onto the bar codes (actually touching the bar code), then detect light reflected from the bar code read.

(3) Gun-type portable bar code scanners that scan light directly over the bar code, then detect the light reflected from the bar code.

Use of any of the bar code scanners described above has the following restrictions: a. Employees must not scan the same bar code twice.

b. Employees must not overscan the bar codes of merchandise to be read.

c. To avoid double scanning and overscanning, employees must be able to easily distinguish between merchandise already scanned and merchandise yet to be scanned.

To perform the above (as shown in Figure 8(B)), employees conventionally had to hold the bar code scanner in one hand while holding a marking pen (e.g., red pens) in the other. When scanning is completed, the employee would mark the bar code to indicate that the article's bar code was scanned.

The scanners described in (1), (2), and (3) above are recommended so that employees can easily scan bar codes and enter numeric values representing additional information such as the quantity of merchandise scanned and any damage to the merchandise.

For instance, when entering such additional information, such as the quantity of merchandise scanned with a gun-type bar code scanner, operators conventionally had to use the ten-key pad on top of the scanner or press a button an appropriate number of times.

Thus, conventional technology poses several problems. Although employees could easily distinguish between merchandise already scanned and merchandise to be scanned at a glance (thus avoiding double scanning and overscanning), the employees had to hold the bar code scanner in one hand and a marking pen in the other, which hindered ease of use and resulted in lowered efficiency.

Additionally, problems occurred when employees had to scan bar codes on merchandise with bar code scanners while doing such additional tasks as numeric input. For instance, when inputting numeric values using the ten-key pad of the bar code scanner, employees must use both hands, which limits efficiency. Pressing a button on the bar code scanner the corresponding number of times to enter a large numeric value places an additional burden on the employee, and is not efficient.

A bar code scanner and a method of reading bar codes and checking is disclosed which provides operators in the transportation or distribution industry with easier use than with conventional scanners and one-handed operation even when such additional tasks as marking scanned bar codes and numeric input are required.

Specifically, a bar code scanner and bar code reading method are provided which: a. Prevents employees from scanning the bar code of an item more than once.

b. Prevents employees from overscanning bar codes on the merchandise.

c. Enables employees to easily distinguish between merchandise already scanned and merchandise to be scanned to avoid double scanning and overscanning. Also employees may perform one-handed operations and have easier use than with conventional scanners.

d. Enables employees to scan easily and to enter numeric values representing the quantities of merchandise scanned using just one hand.

A bar code scanner is disclosed which radiates light to read bar codes on merchandise, detects light reflected from the bar code, and uses an ink jet spray, ink stamp, or marking pen, for example, mounted on the bar code scanner as a single unit, for marking.

Marking is performed by a marking drive signal S or using the marking drive switch after the bar code scanner reads the bar code.

The bar code scanner system also features a numeric table provided near the said bar code scanner. After merchandise-related information is read by referencing the numeric table, the information is input to the said bar code scanner with additional merchandiserelated information.

A bar code scanner configured as described above allows operability to be increased so that operators can easily manipulate bar code scanner 10 with one hand to read bar code on merchandise to be handled, mark a bar code which has been read, and perform such additional tasks as entering the quantity of merchandise read.

Therefore, a) the merchandise bar code read by the said bar code scanner can easily be discriminated from one that has not been read, so that b) the same merchandise bar code is not read twice, and c) nothing to be read is omitted.

Reference is made, by way of example, to the accompanying drawings in which: Figure 1 shows the configuration of a first embodiment of the bar code scanner of this invention.

Figure 2 shows a block diagram of a circuit of the bar code scanner shown in Figure 1.

Figure 3 shows the configuration of the marking unit of the bar code scanner shown in Figure 1.

Figures 4(A) and 4(B) show the configuration of a second embodiment of the bar code scanner of this invention. Figure 4 (A) shows the configuration of the bar code scanner; Figure 4(B) shows an overview of the configuration of the marking unit driving mechanism.

Figures 5(A) and 5(B) show the configuration of a third embodiment of the bar code scanner related to this invention. Figure 5(A) shows the configuration of the bar code scanner; Figure 5(B) shows the configuration of another marking unit.

Figure 6 shows the configuration of a fourth embodiment of the bar code scanner related to this invention.

Figures 7(A) and 7(B) show a bar code reading method according to this invention to perform such additional tasks as the input of numeric values. Figure 7(A) shows the configuration of a delivery center (for supermarkets and convenience stores) in the distribution industry; Figure 7(B) shows the numeric table configuration.

Figures 8(A) and 8(B) show the configuration of a conventional distribution system in the transport business, and tasks to be performed at the distribution terminal. Figure 8(A) shows the configuration of the distribution system; Figure 8(B) shows the tasks to be performed at the distribution terminal.

Examples of the bar code scanner and reading of bar code according to this invention are explained in detail along with practical application examples below in conjunction with Figures 1-7.

Figures 1, 2, and 3 show the construction of a bar code scanner 10 according to the first embodiment. In the figures, 11 is the main body of the bar code scanner, 12 is the operator's hand grip of the bar code scanner 10, and switch 13 is provided where hand grip 12 is connected to the main body of bar code scanner 11.

The operator faces the bar code (in the direction indicated by the arrow) holding hand grip 12, places bar code scanner 10 over the bar code, operates reading switch 13, then radiates laser light and detects the beam reflected from the bar code to read the bar code.

At the top of the main body of bar code scanner 11, numeric keys (i.e., a ten-key pad) are usually provided to enable such additional tasks as entering numeric values indicating the quantity of merchandise and other codes.

The main body of bar code scanner 11 (as shown in Figure 2) includes a light emission section 21 (which emits laser light), a light receiving section 22 (which detects light reflected from the bar code), a light receiving and emission drive section 24 (which drives the light receiving section 22 and light emission section 21), an A/D and data conversion section 25 (which converts the detected analog signals issued from light receiving section 22 into digital signals), a control section 26, a marking unit 23, and an interface (IF) section 27.

Control section 26 controls the driving of the light receiving and emission drive section 24 when the reading switch 13 is operated, to thus control the laser light emitted from light emission section 21 which irradiates the bar code. Laser light reflected from the bar code is detected by light receiving section 22. Signals output by light receiving section 22 in response to the detected light are converted into digital signals by A/D data conversion section 25 and then read as data by control section 26.

Interface (IF) section 27 is used to send and receive data between bar code scanner 10 and a host computer (although a workstation or server may be used instead, for example).

For example, the read bar code data is sent to the host computer through interface (IF) section 27. Generally, an optical adapter or radio signal is employed on a portable bar code scanner instead of interface (IF) section 27. For example, the optical adapter includes a signal converter circuit used to convert read data signals into optical signals, and to convert optical signals from the host computer into electrical signals.

Control section 26 checks the read bar code data. If the data fails this check, laser emission section 21 emits laser light again to rescan the bar code. At the completion of a valid read operation, control section 26 issues marking drive signal S to operate marking unit 23.

In the main body of the bar code scanner 11, as shown in Figure 1, ink jet spray 14 is installed as marking unit 23. When marking unit drive signal S is issued from control section 26 at the completion of a valid read operation, ink jet spray 14 operates to spray ink in the direction indicated by arrow A from ink jet spray nozzle 14a, then applies droplets of ink to mark the target bar code.

Here, element 15 is material that prevents the reading section of bar code scanner 11 from being stained with ink.

Ink jet spray 14 used as marking unit 23 is configured as shown in Figure 3. In Figure 3, a recording head 31 includes ink jet spray nozzle 14a, piezoelectric transducer 32a, vibration plate 32b, ink supply port 33, ink chamber 34, and ink discharge port (orifice) 35.

Ink (recording liquid) 37 contained in reserve tank 36 is supplied to chamber 34 through supply pipe 38. In some cases, an intermediate filter or pump 39 may be desired to be installed in supply pipe 38.

Signals converted from marking drive signal S (see Figure 2) into pulse signals by signal processor 3la(e.g., pulse converter) are applied to piezoelectric transducer 32a, which in turn changes the recording liquid pressure in liquid chamber 34. As a result, recording liquid (ink) 37 is discharged in the form of liquid droplets (ink droplets) 37a from ink discharge port (orifice) 35, and marks made by the ink drops are recorded on recording surface P.

The spraying distance and size of ink droplets 37 (i.e., size of marking on the recording surface) can be determined based on the structural dimensions of the recording head 31, pulse voltages applied to the piezoelectric transducer 32a, and structure of ink discharge port (orifice) 35.

Therefore, the operator reads the bar code using read switch 13 of bar code scanner 10 as previously described, and when bar code reading is completed correctly, ink jet spray unit 14 of marking unit 23 operates automatically. The ink droplets can then be used to mark the bar code read. According to this construction, ink jet spray 14 always operates correctly, thus reducing the operator's workload.

In this example of the first embodiment shown in Figures 1, 2, and 3, when the bar code is read correctly, marking drive signal S is issued by control section 26 and marking unit 23 is operated. It is possible to provide an ink jet spray switch on hand grip 12 of the main body of bar code scanner 11 so that ink is sprayed from ink jet spray nozzle 14a in the direction indicated by the arrow when operating this switch after confirming that the bar code was read correctly.

This enables the operator to read and mark bar codes continuously by continuously operating reading switch 13 and the jet spray switch. If read completion is not indicated due to failure of bar code read switch 13, the operator can simply operate read switch 13 again.

Since the bar code scanner shown in Figures 1, 2, and 3 is constructed and operated as described above, the operator can easily manipulate bar code scanner 10 to read the bar code and perform such additional tasks as marking the bar code on the merchandise with one hand for increased efficiency.

Therefore, 1) operators can easily discriminate between articles of merchandise that have been or have not been scanned, 2) avoid reading the bar code of an article twice, and 3) be sure that all articles are processed.

Figures 4(A) and 4(B) show the construction of the second embodiment (shown in Figure 2) of bar code scanner 10 related to this invention. Figure 4(A) illustrates a main body of bar code scanner 11, a hand grip section 12, and read switch 13. This construction and its operation are the same as those of the first practical application example. The construction of the internal circuit of the main body of bar code scanner 11 is also the same as that shown in Figure 2.

In the main body of bar code scanner 11, stamp unit 14' (where ink is applied) is provided as marking unit 23. When the bar code scanner completes a valid reading of a bar code, marking drive signal S is issued from control section 26 (see Figure 2), and the stamp guide and stamp section 14a' (which configure stamp unit 14') are driven in the direction indicated by arrow A, and a marking is stamped near the bar code that was read.

Stamp unit 14' includes stamp guide and stamp section 14a', stamp pad 14c' (used to apply the ink in stamp unit 14a'), ink storage section 14b' (used to supply ink to stamp pad 14c'), the stamp guide, and stamp section 14a' configured to be controlled in groove 14d' provided on the main body of bar code scanner 11. Stamp unit 14' moves in the direction indicated by arrow A or B, then returns to its home position.

The stamp guide and stamp section 14a' is controlled by lock 14f' (as shown in Figure 4(B)), and held at the position of contacting stamp pad 14c' (position Y in the figure) by spring 14e' (compressed, coiled in position Y).

When the bar code scanner completes a valid reading of a bar code, marking drive signal S is issued from control section 26 (see Figure 2), lock 1 4f, is released, and spring 14e' is uncoiled, thus moving the stamp guide and stamp section 14a' in the direction indicated by arrow A to position X. A marking can then be made near the bar code that was read.

Next, the stamp guide and stamp section 14a' are shifted in the direction of arrow A and returned in the direction of arrow B by the return force of spring 14e', and lock 14f' rotates. Lock 1 4f, is configured to move freely in the direction of arrow B so that the stamp guide and stamp section 14a' return to position Y (home position in the figure) by the return force of spring 14e'.

The moving distance (between positions X and Y in the figure) of the stamp guide and stamp section 14a' can be adjusted by the elasticity constant of spring 14e'. Shift and return may be about 10 cm, for example.

Therefore, the operator reads a bar code using read switch 13 of bar code scanner 10 as previously described. When bar code reading is completed correctly, stamp unit 14' of marking unit 23 operates automatically, then an ink mark can be made near the bar code that was read.

In the examples shown in Figures 4(A) and 4(B), the stamp guide and stamp section 14a', and stamp pad 14c' (to which ink is supplied from ink storage section 14b') were described in separate structures, but these structures can be integrated.

This example describes the configuration in which control section 26 issues marking drive signal S, and stamp unit 14' of marking unit 23 operates when a bar code has been read correctly. For the configuration which includes a stamp drive switch on hand grip section 12 of the main body of bar code scanner 11, after a bar code has been read correctly, lock 14f' is released and stamp unit 14' can be driven in the direction indicated by arrow A by operating this stamp drive switch.

For this configuration, the operator can read bar codes continuously and can mark the bar codes continuously with stamp unit 14' by operating reading switch 13 and the ink jet spray switch. If the read completion indication is not displayed because of a failure in read switch 13, the operator can simply operate read switch 13 again.

Since the bar code scanner shown in Figures 4(A) and 4(B) has the configuration and operations mentioned above, the operator can easily manipulate bar code scanner 10 to read the bar code and perform such an additional tasks as marking the bar code on the merchandise with one hand to operate more efficiently. Therefore, 1) the operator can easily discriminate between merchandise that has been scanned or has not been scanned, 2) avoid processing the same merchandise twice, and 3) avoid skipping any merchandise.

In this practical application example, stamp unit 14' protrudes (in the direction indicated by arrow A in Figures 4(A) and 4(B)) slightly towards the front from the read surface of the main body of bar code scanner 11 so that the operator can touch the main body of bar code scanner 11 to operate stamp unit 14' for marking the bar code.

The spring drive is used to shift and reset stamp unit 14' in the directions indicated by the arrows (A) and (B). Marking drive signal S (see Figure 2) of control section 26 can also be omitted to simplify the configuration of bar code scanner 10.

Also in this practical application example, the size, shape, and installation location of stamp unit 14' is flexible so that the read surface of the bar code scanner need not be blocked.

Figures 5(A) and 5(B) show the configuration of an example of the third embodiment of a bar code scanner 10 according to this invention. Figure 5(A) illustrates a main body of the bar code scanner 11, a hand grip section 12, and a read switch. This configuration and operation are the same as in the first and second examples of practical applications except as discussed below.

Figure 5(A), marking pen 14" is provided as marking unit 23 on the main body of bar code scanner 11, held by support material 14b" provided at bar code scanner 11, and can be affixed and removed as needed using fastener 14a".

In Figure 5(B), marking pen 14" is provided with a marking unit 23 separately from the main body of bar code scanner 11. These components can be affixed to bar code scanner 10 when marking is required.

Marking unit 23 includes a support 14b" for holding a pen 19", a fastener 14a" for fastening the pen 14" to the holder 14b", mounting jig 14d" connected to support 14b" for marking pen 14" and near the main body of the bar code scanner, and fastener 14e". As shown in the figure, mounting jig 14d" can be a belt, for example, and fastener 14e" therefore is provided to tighten the belt type jig 14d" on the main body of bar code scanner 11.

The operator reads bar codes by operating read switch 13 of bar code scanner 10.

After confirming the completion of a bar code reading, the operator handles the marking pen provided on the main body of bar code scanner 11 for marking near the read bar code to indicate the bar code has been read.

Alternatively, the operator may operate read switch 13 without waiting for the completion indicator to indicate completion of bar code reading and can also continuously mark by using the marking pen positioned near the main body of bar code scanner 11. If the read completion indication subsequently is not displayed (because of failure of the bar code read switch 13, for example) the operator can simply operate read switch 13 again.

In this embodiment, the configuration allows the operator to place the reading surface of the main body of bar code scanner 11 near the bar codes, and operate marking pen 14" for marking. Marking drive signal S (see Figure 2) of control section 26 and associated circuitry can be omitted to simplify the construction of bar code scanner 10 because of this marking configuration.

Since the bar code scanner shown in Figures 5(A) and 5(B) has the configuration and operations mentioned above, the operator can easily manipulate bar code scanner 10 to read the bar code and perform such additional tasks as marking the bar code on merchandise with one hand to operate more efficiently.

Therefore, 1) the operator can easily discriminate between merchandise that has been scanned or has not been scanned, 2) avoid processing the same merchandise twice, and 3) avoid skipping any merchandise.

Figure 6 shows the configuration of an example of the fourth embodiment of a bar code scanner 10 of this invention. Figure 6 illustrates a main body of the bar code scanner 11. Its internal circuit configuration is the same as that shown in Figure 2 except that the marking drive signals of control section 26 and associated circuitry may be omitted.

The main body of bar code scanner 11 (like that of a cellular phone) has a smooth rectangular shape, and its edges curved for easy gripping by the operator. Read switch 13 is provided on the top surface so that the operator can easily manipulate it with the thumb of the gripping hand.

The operator can manipulate read switch 13 with the thumb while aiming the bar code scanner toward the bar code to be read (in the direction indicated by the arrow). The laser light emitted from light emitting section 21 scans the bar code, and the beam that is reflected from the bar code is detected by light receive section 22 to read the code (also see Figure 2).

On the top surface of the main body of bar code scanner 11, numeric keys (ten-key pad) 15 are provided within easy access for thumb operation by the operator.

In this embodiment, marking pen 14" is provided on the main body of bar code scanner 11. Marking pen 14" is secured by fastener 14a" for easy replacement. Fastener 14a" is attached to the side of the bar code scanner 11.

The operator can read bar codes by operating read switch 13 of bar code scanner 10.

After confirming the completion of bar code reading, the operator can then use the marking pen provided on the main body of bar code scanner 11 for marking near the bar code to indicate the bar code has been read.

Alternatively, the operator may operate read switch 13 while continuously marking without checking the completion indication of bar code reading by using the marking pen near the main body of bar code scanner 11. If the read completion indication subsequently is not displayed (because of a failure in bar code read switch 13, for example) the operator can simply operate read switch 13 again.

When additional tasks are required, such as input of a number of items and numeric values, the operator can use either thumb to perform these tasks. For example, to input item "36," numeric key labeled "3" is operated first, then numeric key labeled "6" is operated.

Mode switch 16 is

The specified quantity of merchandise based on the merchandise packing list is collected in picking container 72. The types and quantity of merchandise picked are read using the bar code scanner and are input in a computer. The read data is used to update stock data by checking and confirming the merchandise packing list (picking list).

Figure 7(B) illustrates a numeric table 75 (which lists numeric values 76 corresponding to each bar code 77) posted on pillar 74, merchandise container 71, and picking container 72 in the delivery center. After using bar code scanner 10 to read the bar code of the merchandise to be picked, the employee switches bar code scanner 10 to numeric input mode, then reads bar code 77 (corresponding to the numeric value to be input from numeric table 75) to input the quantity of merchandise.

For example, to input "36," an operator reads a portion of bar code 77 corresponding to numeral 3 in numeric table 75, and then reads a portion of bar code 77 corresponding to numeral 6 in numeric table 75 to enter the number of articles.

In the present enable, the numeric table is provided near the employee in the delivery center, but the table can also be attached to the sleeve of the employee's shirt.

The method described in conjunction with Figures 7(A) and 7(B) allows the employee to easily manipulate bar code scanner 10 to read the bar code on the merchandise, mark the bar code already read, and perform such additional tasks as entering the quantity of merchandise read with one hand.

The examples of the bar code scanner operation of the bar code scanner and the method of using this invention to read the bar codes have been described in detail. The invention is not intended to be limited to these specific examples; many modifications will be apparent to those skilled in the art which still fall within the scope of this invention. For example, this invention can also be modified in several ways as described below.

For example, marking unit 23 can be configured as a unit to affix labels. The bar code on the merchandise is read by the bar code scanner, then the label unit affixes a label near the bar code to indicate that the bar code has been read.

Marking unit 23 can also be configured to peel off bar codes. Once a bar code on the merchandise has been read by the bar code scanner, the bar code peeling unit is used to peel off the bar code attached to the merchandise. This procedure enables quick and easy visual recognition of merchandise which bar code has already been read. Note that the operator can no longer read the bar code once it has been peeled off, thereby eliminating the possibility of reading bar codes twice.

One possible variation of the bar code peeling unit is providing a control to adjust the intensity of the laser light. After the bar code on the merchandise is read, the intensity of the laser light is increased to burn the bar code.

Another variation for reading bar codes involves the use of color development materials (e.g., heat-sensitive paper or ink) to transfonn a bar code when radiating the laser light. When the bar code on the merchandise is read, the paper on which the bar code is printed or the bar code ink is transformed in response to the laser light. Such a bar code scanning operation (with the subsequent change of the color of the paper or ink) assures recognition that the bar code has been read.

After bar code reading, a voice input and scanning using numeric keys (ten-key pad) can be configured to enter additional information. For example, light of the lamps of the ten keys is used for scanning, and when a numeric value to be input is scanned, scanning is stopped to determine the value to be input. Plus and minus keys are provided to determine numeric values, and a rotary system counter is provided to input numeric values.

The operator can easily manipulate the bar code scanner with one hand and perform such additional tasks as entering numeric values.

The invention can be applied to various types of bar code scanners, such as a pentype bar code scanner, touch-type bar code scanner, and gun-type bar code scanner.

Claims

ClAIMS:

1. An apparatus for identifying items, comprising: reading means for reading an identifying label attached to an item; and marking means, attached to said reading means, for marking one of the identifying label and the item to indicate that the identifying label has been read by said reading means.

2. The apparatus of claim 1, wherein said marking means includes a marker holder permanently attached to said reading means.

3. The apparatus of claim 2, wherein said marker holder includes pen fixing means for fixing a pen to said marker holder.

4. The apparatus of claim 1, wherein said marking means is removably attached to said reading means.

5. The apparatus of claim 4, wherein said marking means includes a marker holder and an adjustable belt fixed to said marker holder and removably attached to said reading means.

6. The apparatus of claim 1, wherein said marking means includes ink spraying means for spraying ink after said reading means reads the identifying label.

7. The apparatus of claim 1, wherein said marking means includes stamping means for projecting toward the identifying label to stamp one of the identifying label and the item after said reading means reads the identifying label.

8. The apparatus of any preceding claim, further carprising: control means for operating said marking means upon determining that the identifying label has been read.

9. The apparatus of any preceding claim, wherein said reading means is a bar code reader and said identifying label is a bar code.

10. An apparatus for identifying items, comprising: a bar code reader; a marker attached to said bar code reader, positioned about said bar code reader to mark one of an item and a bar code attached to the item when said bar code reader is reading the bar code attached to the item.

11. The apparatus of claim 10, wherein said bar code reader includes a control unit having an output of a marking drive signal in response to a determination that the bar code has been read, and said marker has an input of the marking drive signal and is responsive to said marking drive signal to mark one of the item and the bar code attached to the item.

12. The apparatus of claim 11, wherein said marker includes an ink sprayer which is responsive to said marking drive signal to spray ink on one of the item and the bar code attached to the item.

13. The apparatus of claim 12, wherein said ink sprayer includes an ink reservoir and a recording head in fluid communication with said ink reservoir.

14. The apparatus of claim 13, wherein said recording head includes: a signal processor receiving the marking drive signal as an input and having a pulsed signal as an output; a piezoelectric element, receiving said pulsed signal as an input and producing vibrations in response to the pulsed signal; a chamber, in fluid communication with said ink reservoir, and connected to said piezoelectric element to receive the vibrations from said piezoelectric element; and a nozzle, in fluid communication with said chamber, spraying the ink in response to vibrations received by said charnber.

15. The apparatus of claim 11, wherein said marker includes a stamp which is responsive to said marking drive signal to extend toward the bar code to mark one of the item and the bar code attached to the item.

16. The apparatus of claim 15, wherein said stamp includes: a stamp pad; and a stamp guide fixed to said stamp pad and slidably attached within a groove of said bar code reader.

17. The apparatus of claim 16, wherein said stamp further includes: a spring, connected to at least one of said stamp guide and said stamp pad, said spring being compressed when said stamp is retracted and being uncompressed when said stamp is extended; and a lock, locking said spring into a compressed state, and unlocking said spring to uncompress and extend said stamp in response to said marking drive signal.

18. The apparatus of claim 11, wherein said marker includes a marking instrument holder attached to said bar code reader and a marking instrument held by said marking instrument holder.

19. The apparatus of claim 18, wherein said marking instrument is a marking pen.

20. The apparatus of claim 18 or 19, herein said marking instrument holder is permanently attached to said bar code reader.

21. The apparatus of claim 20, wherein said marking instrument holder has a marking instrument fastener which fastens and unfastens said marking instrument to said marking instrument holder to allow replacement of said marking instrument.

21. The apparatus of claim 18 or 19, wherein said marking instrument holder is removably attached to said bar code reader by an adjustable jig.

22. The apparatus of claim 21, wherein said adjustable jig includes a looped belt which surrounds said bar code reader; and a fastener which fastens a length of said belt and allows adjustment of the length of said belt.

23. The apparatus of any of claims 11 to 22, herein said bar code reader includes a key pad and a mode switch to switch bar code reading to numeric value input to indicate the number of items associated with a read bar code, said key pad and mode switch accessible by a digit of a hand holding said bar code reader.

24. A method of identifying items, comprising: (a) scanning with a reader an identification code attached to an item; (b) marking at least one of the identification code and the item with a marker attached to the reader.

25. The method of claim 24, wherein step (a) includes scanning a bar code with a bar code reader.

26. The method of claim 24 or 25, wherein step (b) includes marking with a stamp attached to the reader.

27. The method of claim 24 or 25, 'wherein step (b) includes marking with a ink sprayer attached to the reader.

28. The method of claim 24 or 25, wherein step (b) includes automatically extending a stamp towards the identification code upon determining the identification code has been read.

29. The method of claim 24 or 25, wherein step (b) includes automatically spraying ink on or near the identification code upon determining the identification code has been read.

30. The method of claim 24 or 25, wherein step (b) includes marking with a marking pen attached to the bar code reader.

31. The method of any of claims 24 to 30, further catprising: (c) entering a number into the reader corresponding to the number of items associated with the identification code.

32. The method of claim 31, wherein step (c) includes pushing a numeric key of a key pad of the reader.

33. The method of claim 31, wherein step (c) includes scanning one or more numeric codes to enter the number into the reader corresponding to the number of items associated with the identification code.

34. The method of claim 33 wherein step (c) includes scanning one or more numeric codes which are part of a numeric table, the numeric table being attached to clothing of an operator of the reader.

35. The method of claim 33, wherein step (c) includes scanning one or more numeric codes of a numeric table provided in a working area.

36. An apparatus for identifying intems, substantially as hereinbefore described with reference to Figures 1 to 7 of the a#uying drawiws.

36. An apparatus for identifying items, substantially as hereinbefore described with reference to Figures 1 to 7 of the accompenying drawings.

Amendments to the claims have been filed as follows CLAIMS:

1. An apparatus for identifying items by reading an identifying label, comprising: reading means for reading the identifying label attached to an item; and marking means, attached to the reading means so as to face the identifying label when the identifying label is read by said reading means, for marking on the identifying label read by the reading means or on the item, to indicate that the identifying label on the item has already been read.

7. The apparatus of claim 1, wherein said marking means includes stamping means for projecting toward the identifying label to stamp one of the identifying label and the item after said reading means reads the identifying label

8. The apparatus of any preceding claim, further u svising: control means for operating said marking means upon determining that the identifying label has been read.

10. An apparatus for identifying items, comprising: a bar code reader; a marker attached to said bar code reader, positioned about said bar code reader to ziark on one of an itml and a bar code attached to the itan en said bar code reader is reading the bar code attached to the iten.

14. The apparatus of claim 13, wherein said recording head includes: a signal processor receiving the marking drive signal as an input and having a pulsed signal as an output; a piezoelectric element, receiving said pulsed signal as an input and producing vibrations in response to the pulsed signal; a chamber, in fluid communication with said ink reservoir, and connected to said piezoelectric element to receive the vibrations from said piezoelectric element; and a nozzle, in fluid communication with said chamber, spraying the ink in response to.

vibrations received by said chamber.

18. The apparatus of claim 1.1, wherein said marker includes a marking instrument holder attached to said bar code reader and a marking instrument held by said marking instrument holder.

20. The apparatus of claim 18 or 19, wherein said marking instrument holder is permanently attached to said bar code reader.

21. The apparatus of claim 20, wherein said marking instrument holder has a marking instrument fastener which fastens and unfastens said marking instrument to said marking instrument holder to allow replacement of said marking instrument

21. The apparatus of claim 18 or 19, herein said marking instrument holder is removably attached to said bar code reader by an adjustable jig.

22. The apparatus of clairn 21, wherein said adjustable jig includes a looped belt which surrounds said bar code reader; and a fastener which fastens a length of said belt and allows adjustment of the length of said belt.

23. The apparatus of any of claims 11 to 22, wherein said bar code reader includes a key pad and a mode switch to switch bar code reading to numeric value input to indicate the number of items associated with a read bar code, said key pad and mode switch accessible by a digit of a hand holding said bar code reader.

24. A method of identifying items, comprising: (a) scanning with a reader an identification code attached to an item; (b) marking at least on one of the identification code and the item with a marker attached to the reader, to indicate that the identification code on the item has already been read.

27. The method of claim 24 or 25, wherein step (b) includes marking with a ink sprayer attached to the reader.

31. The method of any of claims 24 to 30, further conprising: (c) entering a number into the reader corresponding to the number of items associated with the identification code.

34. The method of claim 33 wherein step (c) includes scanning one or more numeric codes which are part of a numeric table, the numeric table being attached to dothing of an operator of the reader.