account_bank_statement_print/views/bank_statement_button.xml

<?xml version="1.0" encoding="UTF-8"?>
<openerp>
	<data>
		<!-- Registros de caja -->
        <record id="views_account_bank_statement_print" model="ir.ui.view">
            <field name="name">account.bank.statement.print</field>
            <field name="model">account.bank.statement</field>
            <field name="inherit_id" ref="account.view_bank_statement_form2"/>
            <field name="arch" type="xml">
                <label for="name" position="before">
                    <div class="oe_right oe_button_box print_statement_box" attrs="{'invisible': [('state','=','draft')]}"></div>
                </label>
            </field>
        </record>
		<!-- Extractos bancario -->
		<record id="views_account_bank_statement_print2" model="ir.ui.view">
            <field name="name">account.bank.statement.print2</field>
            <field name="model">account.bank.statement</field>
            <field name="inherit_id" ref="account.view_bank_statement_form"/>
            <field name="arch" type="xml">
                <label for="name" position="before">
                    <div class="oe_right oe_button_box print_statement_box"></div>
                </label>
            </field>
        </record>
	</data>
</openerp>