什么是(shi)裹(guo)背(bei)(bei)條，裹(guo)背(bei)(bei)條是(shi)通(tong)過皮殼機(ji)(ji)等(deng)機(ji)(ji)械用于精裝(zhuang)(zhuang)書(shu)(shu)本的書(shu)(shu)脊部(bu)分，使(shi)書(shu)(shu)貼連接得(de)更(geng)加(jia)牢固。書(shu)(shu)脊制作弧長的計算(suan)，本器規格依書(shu)(shu)芯幅面大小(xiao)進(jin)行調定(ding)，以能將書(shu)(shu)芯平穩(wen)地送(song)進(jin)夾書(shu)(shu)裝(zhuang)(zhuang)置(zhi)內(nei)為標(biao)準。入本后的書(shu)(shu)冊不(bu)斜(xie)歪，四(si)角垂(chui)直地頂齊(qi)在夾書(shu)(shu)裝(zhuang)(zhuang)置(zhi)的靠板、側規內(nei)。裁切(qie)尺寸正確一(yi)致(zhi)，其(qi)質(zhi)量要求與規格誤差與一(yi)般切(qie)書(shu)(shu)相同。

夾書(shu)(shu)簽絲(si)帶裝置(zhi)安放在切書(shu)(shu)機(ji)與扒圓(yuan)起脊機(ji)之間。即將切完的(de)書(shu)(shu)芯(xin)，用分本器從中(zhong)間分開，再(zai)由輸放絲(si)帶器將絲(si)帶夾入中(zhong)心紙書(shu)(shu)芯(xin)的(de)中(zhong)間靠(kao)訂縫一邊(bian)。絲(si)帶夾在書(shu)(shu)芯(xin)內兩端各留出(chu)粘(zhan)邊(bian)和(he)使用的(de)余地，再(zai)經切刀（剪刀式(shi)）將其剪斷(duan)。

剪(jian)斷后(hou)的(de)絲(si)帶(dai)，裹背(bei)(bei)條芯(xin)(xin)(xin)部分(fen)被(bei)下面(mian)(mian)膠輥著膠、壓實(shi)完(wan)成(cheng)夾書(shu)(shu)(shu)(shu)(shu)簽絲(si)帶(dai)過(guo)程。書(shu)(shu)(shu)(shu)(shu)簽絲(si)帶(dai)的(de)長度與一(yi)般手工(gong)加工(gong)長度基(ji)本相同，可依書(shu)(shu)(shu)(shu)(shu)冊(ce)幅面(mian)(mian)長度調(diao)定。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起脊(ji)操作(zuo)(zuo)及要(yao)求。書(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)經裁切(qie)、夾粘(zhan)絲(si)帶(dai)（或(huo)(huo)不夾粘(zhan)絲(si)帶(dai)）后(hou)，繼續傳送（或(huo)(huo)翻(fan)轉變位）并做90°翻(fan)轉，使(shi)平(ping)(ping)放書(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)變為后(hou)背(bei)(bei)朝上(shang)（或(huo)(huo)朝下）而(er)進入(ru)扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起脊(ji)機(ji)。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起脊(ji)機(ji)的(de)加工(gong)，其操作(zuo)(zuo)分(fen)為兩(liang)步，但機(ji)器(qi)的(de)結構(gou)是(shi)連(lian)在一(yi)起的(de)，均是(shi)先扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)后(hou)起脊(ji)。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)。扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)起脊(ji)機(ji)在扒(ba)(ba)(ba)圓(yuan)(yuan)(yuan)時(shi)，由一(yi)組（或(huo)(huo)一(yi)對）圓(yuan)(yuan)(yuan)輥，將(jiang)書(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)壓緊后(hou)作(zuo)(zuo)相對旋轉動作(zuo)(zuo)），使(shi)書(shu)(shu)(shu)(shu)(shu)背(bei)(bei)扒(ba)(ba)(ba)成(cheng)適(shi)當規格圓(yuan)(yuan)(yuan)勢，加工(gong)成(cheng)圓(yuan)(yuan)(yuan)背(bei)(bei)書(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)書(shu)(shu)(shu)(shu)(shu)背(bei)(bei)的(de)形狀分(fen)為圓(yuan)(yuan)(yuan)背(bei)(bei)有脊(ji)、圓(yuan)(yuan)(yuan)背(bei)(bei)無(wu)脊(ji)和方背(bei)(bei)（或(huo)(huo)稱(cheng)平(ping)(ping)背(bei)(bei)）三種(zhong)。平(ping)(ping)裝(zhuang)裹背(bei)(bei)條書(shu)(shu)(shu)(shu)(shu)刊的(de)書(shu)(shu)(shu)(shu)(shu)脊(ji)不高出(chu)書(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)平(ping)(ping)面(mian)(mian)，而(er)精裝(zhuang)書(shu)(shu)(shu)(shu)(shu)刊的(de)書(shu)(shu)(shu)(shu)(shu)脊(ji)一(yi)般要(yao)高出(chu)書(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)的(de)平(ping)(ping)面(mian)(mian)。書(shu)(shu)(shu)(shu)(shu)脊(ji)分(fen)為真脊(ji)和假脊(ji)。

真脊是(shi)(shi)利用(yong)書(shu)(shu)(shu)(shu)背(bei)(bei)上下兩邊(bian)變形的(de)(de)弧(hu)度高出(chu)書(shu)(shu)(shu)(shu)芯(xin)(xin)平面；假(jia)脊則(ze)是(shi)(shi)利用(yong)紙板(ban)鑲(xiang)在書(shu)(shu)(shu)(shu)背(bei)(bei)后(hou)形成的(de)(de)書(shu)(shu)(shu)(shu)脊，書(shu)(shu)(shu)(shu)脊的(de)(de)脊高等于封面紙板(ban)的(de)(de)厚度。方背(bei)(bei)書(shu)(shu)(shu)(shu)芯(xin)(xin)。是(shi)(shi)指書(shu)(shu)(shu)(shu)芯(xin)(xin)的(de)(de)書(shu)(shu)(shu)(shu)背(bei)(bei)平直方正。書(shu)(shu)(shu)(shu)背(bei)(bei)不突出(chu)，與平裝書(shu)(shu)(shu)(shu)刊的(de)(de)書(shu)(shu)(shu)(shu)背(bei)(bei)基本相似。

背(bei)(bei)(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)上下環(huan)襯互(hu)成(cheng)(cheng)直角，由于精裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)是(shi)用(yong)鎖線(xian)訂訂連(lian)，每一(yi)個書(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)的(de)(de)(de)(de)(de)(de)(de)訂口(kou)折縫(feng)里面(mian)都用(yong)線(xian)串過，因此(ci)，書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)背(bei)(bei)(bei)脊(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)帖(tie)其(qi)它(ta)部(bu)分要厚一(yi)些，書(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)的(de)(de)(de)(de)(de)(de)(de)帖(tie)數越(yue)多(duo)，書(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)背(bei)(bei)(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)其(qi)它(ta)部(bu)分厚度(du)的(de)(de)(de)(de)(de)(de)(de)差別也越(yue)大。所以方(fang)背(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)的(de)(de)(de)(de)(de)(de)(de)形(xing)(xing)(xing)式(shi)(shi)一(yi)般只用(yong)于厚度(du)約為20mm的(de)(de)(de)(de)(de)(de)(de)精裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)有(you)(you)脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)有(you)(you)脊(ji)又(you)稱圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)真脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)背(bei)(bei)(bei)部(bu)呈圓(yuan)(yuan)(yuan)弧(hu)形(xing)(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)高起有(you)(you)脊(ji)壟(long)，堅硬(ying)挺實，這(zhe)種書(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)的(de)(de)(de)(de)(de)(de)(de)形(xing)(xing)(xing)式(shi)(shi)適(shi)合于裝(zhuang)訂較厚的(de)(de)(de)(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)，裝(zhuang)上書(shu)(shu)(shu)(shu)(shu)(shu)殼后(hou)有(you)(you)明顯的(de)(de)(de)(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)槽，翻閱方(fang)便。目前我國(guo)的(de)(de)(de)(de)(de)(de)(de)精裝(zhuang)書(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)多(duo)采用(yong)這(zhe)種圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)有(you)(you)脊(ji)的(de)(de)(de)(de)(de)(de)(de)加工形(xing)(xing)(xing)式(shi)(shi)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)無(wu)脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)。圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)無(wu)脊(ji)書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)又(you)稱圓(yuan)(yuan)(yuan)背(bei)(bei)(bei)假脊(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)背(bei)(bei)(bei)部(bu)呈圓(yuan)(yuan)(yuan)弧(hu)形(xing)(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)的(de)(de)(de)(de)(de)(de)(de)厚度(du)相同，堅實挺括，但沒有(you)(you)書(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)(bei)(bei)條脊(ji)。這(zhe)種形(xing)(xing)(xing)式(shi)(shi)的(de)(de)(de)(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)，一(yi)般常與(yu)軟質書(shu)(shu)(shu)(shu)(shu)(shu)殼或塑料壓制而成(cheng)(cheng)的(de)(de)(de)(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)殼相配套。中心紙有(you)(you)些機器還(huan)沒有(you)(you)沖圓(yuan)(yuan)(yuan)裝(zhuang)置，即(ji)將(jiang)方(fang)背(bei)(bei)(bei)書(shu)(shu)(shu)(shu)(shu)(shu)先(xian)進行沖圓(yuan)(yuan)(yuan)加工，作初步(bu)定(ding)型。先(xian)根據書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)厚度(du)和中心紙幅面(mian)大小調定(ding)好(hao)夾(jia)書(shu)(shu)(shu)(shu)(shu)(shu)器及(ji)扒(ba)圓(yuan)(yuan)(yuan)輥（或沖圓(yuan)(yuan)(yuan)裝(zhuang)置）的(de)(de)(de)(de)(de)(de)(de)規矩，再使書(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)進入夾(jia)書(shu)(shu)(shu)(shu)(shu)(shu)器內并送到扒(ba)圓(yuan)(yuan)(yuan)輥之間(jian)，將(jiang)書(shu)(shu)(shu)(shu)(shu)(shu)背(bei)(bei)(bei)扒(ba)擠成(cheng)(cheng)一(yi)定(ding)圓(yuan)(yuan)(yuan)勢。